研究業績 | 東京工業大学大学院理工学研究科化学専攻 岩澤・鷹谷研究室

研究業績

2012-

Visible-Light-Driven Carboxylation of Aryl Halides by the Combined Use of Palladium and Photoredox Catalysts
K. Shimomaki, K. Murata, R. Martin, and N. Iwasawa
J. Am. Chem. Soc., ASAP , Highlighted in ChemistryViews


Synthesis, Structure, and Catalysis of Palladium Complexes Bearing a Group 13 Metalloligand: Remarkable Effect of an Aluminum-Metalloligand in Hydrosilylation of CO2
J. Takaya, and N. Iwasawa
J. Am. Chem. Soc., 139, 6074-6077 (2017)


Synthesis and Reactivity of Iron– and Cobalt–Dinitrogen Complexes Bearing PSiP-Type Pincer Ligands toward Nitrogen Fixation
R. Imayoshi, K. Nakajima, J. Takaya, N. Iwasawa, and Y. Nishibayashi
Eur. J. Inorg. Chem., early view


Metallic reductant-free synthesis of α-substituted propionic acid derived through hydrocarboxylaion of alkenes with formate salt
J. Takaya, K. Miyama, C. Zhu, and N. Iwasawa
Chem. Commun., 53, 3982-3985 (2017)


Construction of a Visible Light-Driven Hydrocarboxylation Cycle of Alkenes by the Combined Use of Rh(I) and Photoredox Catalysts
K. Murata, N. Numasawa, K. Shimomaki, J. Takaya, and N. Iwasawa
Chem. Commun., 53, 3098-3101 (2017)


Control of the Reversibility During Boronic Etser Formation: Application to the Construction of Ferrocene Dimers and Trimers
K. Ono, Y. Tohyama, T. Uchikura, Y. Kikuchi, K. Fujii, H. Uekusa, and N. Iwasawa
Dalton Trans., 46, 2370-2376 (2017)


Mechanistic study of the rhodium-catalyzed carboxylation of simple aromatic compounds with carbon dioxide
T. Suga, T. Saitou, J. Takaya, and N. Iwasawa
Chem. Sci., 8, 1454-1462 (2017)


Switching of the solid-state guest selectivity: solvent-dependent selective guest inclusion in a crystalline macrocyclic boronic ester
S. Ito, K. Ono, K. Johmoto, H. Uekusa, and N. Iwasawa
Chem. Sci., 7, 5765-5769 (2016)


Rhenium(I)-Catalyzed Generation of α,β-Unsaturated Carbene Complex Intermediates from Propargyl Ethers for the Preparation of Cycloheptadiene Derivatives
H. Sogo, and N. Iwasawa
Angew. Chem. Int. Ed., 55, 10057-10060 (2016)


Total Synthesis of (±)-Integrifolin
K. Shimomaki, H. Kusama, and N. Iwasawa
Chem. Eur. J., 22, 9953-9957 (2016). Highlighted in ChemistryViews, Synfacts (2016, No9, p 889)


Total Synthesis of Englerin A Utilizing Intermolecular [3+2] Cycloaddition Reaction of Platinum-Containing Carbonyl Ylide
Kusama, A. Tazawa, K. Ishida, and N. Iwasawa
Chem. Asian J., 11, 64-67 (2016).


Fluorine-controlled C-H borylation of arenes catalyzed by a PSiN-pincer platinum complex
J. Takaya, S. Ito, H. Nomoto, N. Saito, N. Kirai and N. Iwasawa
Chem. Commun., 51, 17662-17665 (2015).


Total Synthesis of Proposed Structure of Yuremamine and All Diastereomers Using [3+2]-Cycloaddition of Platinum-Containing Azomethine Ylide
T. Ohyama, M. Uchida, H. Kusama, and N. Iwasawa
Chem. Asian J., 10, 1850-1853 (2015).


Self-Assembly of Nanometer-Sized Boroxine Cages from Diboronic Acids
K. Ono, K. Johmoto, N. Yasuda, H. Uekusa, S. Fujii, M. Kiguchi, and N. Iwasawa
J. Am. Chem. Soc., 137, 7015-7018 (2015). Highlighted as editor's choice in Science, 348, (2015).


Use of Formate Salts as a Hydride and a CO2 Source in PGeP-Palladium Complex-Catalyzed Hydrocarboxylation of Allenes
C. Zhu, J. Takaya, and N. Iwasawa
Org. Lett., 17, 1814-1817 (2015).


Inclusion of Two Different Guest Molecules within a Rationally Designed Macrocyclic Boronic Ester in Organic Solvent
Y. Kikuchi, K. Ono, K. Johmoto, H. Uekusa, and N. Iwasawa
Chem. Eur. J., 20, 15737-15741 (2014).


Direct Carboxylation of Simple Arenes with CO2 through a Rhodium Catalyzed C-H Bond Activation
T. Suga, H. Mizuno, J. Takaya, and N. Iwasawa
Chem. Commun., 50, 14360-14363 (2014).


Procedure-Dependent Construction of Two Kinds of Trimeric Self-Assembled Boronic Esters
K. Ono, R. Aizawa, T. Yamano, S. Ito, N. Yasuda, K. Johmoto, H. Uekusa, and N. Iwasawa
Chem. Commun., 50, 13683-13686 (2014).


Silyl Ligand-Mediated Reversible beta-Hydrogen Elimination and Hydrometallation at Palladium
J. Takaya, and N. Iwasawa
Chem. Eur. J., 20, 11812-11819 (2014).


Enhancement of Host-Guest Interaction Using Rationally Designed Macrocyclic Boronic Esters with Naphthalene Core
Y. Kikuchi, H. Takahagi, K. Ono, and N. Iwasawa
Chem. – Asian J., 9, 1011-1005 (2014).


Mechanistic Studies on the Stereoisomerization Between Two Stereoisomeric, Isolable Five-Coordinate Borylpalladium(II) Complexes Bearing a Phenylene-Bridged PSiP-Pincer Type Ligand
J. Takaya, N. Kirai, and N. Iwasawa
Organometallics, 33, 1499-1502 (2014)


Cobalt-Salen Complex Catalyzed Oxidative Generation of Alkyl Radicals from Aldehydes for the Preparation of Hydroperoxides
E. Watanabe, A. Kaiho, H. Kusama, and N. Iwasawa
J. Am. Chem. Soc., 135, 11744-11747 (2013)


Palladium(II)-Catalyzed Direct Carboxylation of Alkenyl C-H Bonds with CO2
K. Sasano, J. Takaya, and N. Iwasawa
J. Am. Chem. Soc., 135, 10954-10957 (2013)


Release and Recovery of Guest Molecules During the Reversible Borate Gel Formation of Guest-Included Macrocyclic Boronic Esters
S. Ito, H. Takata, K. Ono, and N. Iwasawa
Angew. Chem. Int. Ed., 52, 11045-11048 (2013).


Construction of Cyclohepta[b]indoles via Platinum Catalyzed Intermolecular Formal [4+3]-Cycloaddition Reaction of α,β-Unsaturated Carbene Complex Intermediates with Siloxydienes
H. Kusama, H. Sogo, K. Saito, T. Suga, and N. Iwasawa
Synlett., 24, 1364-1370 (2013)


PSiP-Pincer Type Palladium-Catalyzed Dehydrogenative Borylation of Alkenes and 1,3-Dienes
N. Kirai, S. Iguchi, T. Ito, J. Takaya, and N. Iwasawa
Bull. Chem. Soc. Jpn., 86, 784-799 (2013)


Two Reversible σ-bond Metathesis Pathways for Boron-Palladium Bond Formation: Selective Synthesis of Isomeric Five-coordinate Borylpalladium Complexes
N. Kirai, J. Takaya, and N. Iwasawa
J. Am. Chem. Soc., 135, 2493-2496 (2013)


Protonation-Triggered Generation of Acyl-cobalt Species from Alkyne-[Co2(CO)6] Complexes and Their Reaction with Alkenes
I. Ooi, T. Sakurai, J. Takaya, and N. Iwasawa
Chem. Eur. J., 18, 14618-14621 (2012).


Synthesis, Structure, and Catalytic Activity of Palladium Complexes Bearing a Tridentate PXP-Pincer Ligand of Heavier Group 14 Element (X=Ge, Sn)
J. Takaya, S. Nakamura, and N. Iwasawa
Chem. Lett., 41, 967-969 (2012).


Controlled self-assembly of multiple diastereomeric macrocyclic boronic esters composed of two chiral units
S. Ito, K. Ono and N. Iwasawa
J. Am. Chem. Soc., 134, 13962-13965 (2012).


Selective Intermolecular [2+2] Cycloaddition Reaction Using Platinum(II) Catalyst with Hollow-Shaped Triethynylphosphine
M. Ebisawa, H. Kusama, and N. Iwasawa
Chem. Lett., 41, 786-788 (2012).


Guest-Induced Self-Assembly of Macrocyclic Boronic Ester Containing Diarylethene Units: Enhancement of Photoresponsivity
N. Iwasawa, H. Takahagi, K. Ono, K. Fujii, and H. Uekusa
Chem. Commun., 48, 7477-7479 (2012).


Chromium(0)-Catalyzed Tandem Cyclization of α,β−Unsaturated Thioimidates Containing an Enyne Moiety
Y. Karibe, H. Kusama, N. Iwasawa
Angew. Chem. Int. Ed., 51, 6214-6218 (2012).


2007 - 2011

Efficient Synthesis of Diborylalkenes from Alkenes and Diboron by a New PSiP-Pincer Palladium-Catalyzed Dehydrogenative Borylation
J. Takaya, N. Kirai, N. Iwasawa
J. Am. Chem. Soc., 133, 12980-12983 (2011).
Efficient Control for the Cationic Platinum(II)-Catalyzed Concise Synthesis of Two Types of Fused Carbocycles with Angular Oxygen Functionality
H. Kusama, E. Watanabe, K. Ishida, N. Iwasawa
Chem. – Asian J., 6, 2273-2277 (2011).
Reaction of bis(o-phosphinophenyl)silane with M(PPh3)4 (M = Ni, Pd, Pt): synthesis and structural analysis of η2-(Si-H) metal(0) and pentacoordinate silyl metal(II) hydride complexes of the Ni triad bearing a PSiP-pincer ligand
J. Takaya, N. Iwasawa
Dalton Trans., 40, 8814-8821 (2011).
Photochemically Promoted Transition Metal-Free Cross Coupling of Acylsilanes with Organoboronic Esters
K. Ito, H. Tamashima, N. Iwasawa, H. Kusama
J. Am. Chem. Soc., 133, 3716-3719 (2011).
Rhenium(I)- and Tungsten(0)-Catalyzed Tandem Cyclization of Acetylenic Dienol Silyl Ethers Based on Geminal Carbo-Functionalization of Alkynes
H. Kusama, Y. Karibe, R. Imai, Y. Onizawa, H. Yamabe, N. Iwasawa
Chem.–Eur. J., 17, 4839-4848 (2011).
[3+2] Cycloaddition of Metal-Containing Azomethine Ylides for Highly Efficient Synthesis of Mitosene Skeleton
J. Takaya, Y. Miyashita, H. Kusama, N. Iwasawa
Tetrahedron, 67, 4455-4466 (2011).
Efficient One-to-One Coupling of Easily Available 1,3-Dienes with Carbon Dioxide
J. Takaya, K. Sasano, N. Iwasawa
Org. Lett. 13, 1698-1701 (2011).
Rhodium(I)-Catalyzed Direct Carboxylation of Arenes with CO2 via Chelation-Assisted C−H Bond Activation
H. Mizuno, J. Takaya, N. Iwasawa
J. Am. Chem. Soc., 133, 1251-1253 (2011). (この研究成果が新聞で紹介されました。読売新聞 2011/01/19朝刊朝日新聞 2011/01/25朝刊、毎日新聞 2011/02/01朝刊)
Platinum(II)-Catalyzed Generation and [3+2] Cycloaddition Reaction of α,β−Unsaturated Carbene Complex Intermediates for the Preparation of Polycyclic Compounds
K. Saito, H. Sogou, T. Suga, H. Kusama, N. Iwasawa
J. Am. Chem. Soc., 133, 689-691 (2011).
Crystallization-Controlled Dynamic Self-Assembly and an On/Off Switch for Equilibration Using Boronic Ester Formation
H. Takahagi, N. Iwasawa
Chem.-Eur. J., 16, 13680-13688 (2010).
[4+2] Cycloaddition Reaction of Cyclic Alkyne–{Co2(CO)6} Complexes with Dienes
N. Iwasawa, I. Ooi, K. Inaba, J. Takaya
Angew. Chem. Int. Ed., 49, 7534-7537 (2010).
Synthetic Studies on and Mechanistic Insight into [W(CO)5(L)]-Catalyzed Stereoselective Construction of Functionalized Bicyclo[5.3.0]decane Frameworks
Y. Onizawa, M. Hara, T. Hashimoto, H. Kusama, N. Iwasawa
Chem.–Eur. J., 16, 10785-10796 (2010). (selected as a VIP)
Enantioselective Preparation of 8-Oxabicyclo[3.2.1]octane Derivatives via Asymmetric [3+2]-Cycloaddition of Platinum-Containing Carbonyl Ylides with Vinyl Ethers
K. Ishida, H. Kusama, N. Iwasawa
J. Am. Chem. Soc., 132, 8842-8843 (2010).
Rhodium-catalyzed Synthesis of γ−Pyrones by Three Consecutive Redox-Aldol Reactions of Allylic Alcohols with α,β−Unsaturated Aldehydes
A. Mizuno, H. Kusama, N. Iwasawa
Chem.–Eur. J., 16, 8248-8250 (2010).
Gold-Catalyzed Tandem Cyclization of Dienol-Silyl Ethers for the Preparation of Bicyclo[4.3.0]nonane Derivatives
H. Kusama, Y. Karibe, Y. Onizawa, N. Iwasawa
Angew. Chem. Int. Ed., 49, 4269-4272 (2010).
Rhenium(I)-Catalyzed Cyclization of Silyl Enol Ethers Containing a Propargyl Carboxylate Moiety: A Versatile Access to Highly Substituted Phenols
K. Saito, Y. Onizawa, H. Kusama, N. Iwasawa
Chem.–Eur. J., 16, 4716-4720 (2010).
Bis(o-phosphinophenyl)silane as a Scaffold for Dynamic Behavior of H-Si and C-Si Bonds with Palladium(0)
J. Takaya, N. Iwasawa
Organometallics, 28, 6636-6638 (2009).
Guest-Induced Dynamic Self-Assembly of Two Diastereomeric Cage-Like Boronic Esters
H. Takahagi, S. Fujibe, N. Iwasawa
Chem.-Eur. J. 15, 13327-13330 (2009).
Platinum(II)-Catalyzed Intermolecular [3+2] Cycloaddition Reaction of Propadienyl Silyl Ethers and Alkenyl Ethers
H. Kusama, M. Ebisawa, H. Funami, N. Iwasawa
J. Am. Chem. Soc., 131, 16352-16353 (2009).
Rhodium(I)-Catalyzed [4+1] Cycloaddition Reactions of α,β-Unsaturated Imines with Terminal Alkynes for the Preparation of Substituted Pyrrole Derivatives
A. Mizuno, H. Kusama, N. Iwasawa
Angew. Chem. Int. Ed. 48, 8318-8320 (2009).
Theoretical Study of the Cycloaddition Reaction of a Tungsten-Containing Carbonyl Ylide
K. Ito, Y. Hara, S. Mori, H. Kusama, N. Iwasawa
Chem.-Eur. J. 15, 12408-12416 (2009).
Molybdenum(0)-Promoted Carbonylative Cyclization of o-Haloaryl- and β-Haloalkenylimine Derivatives by Oxidative Addition of a Carbon(sp2)-Halogen Bond: Preparation of Two Types of γ-Lactams
J. Takaya, K. Sangu, N. Iwasawa
Angew. Chem. Int. Ed. 48, 7090-7093 (2009).
Hydrocarboxylation of Allenes with CO2 Catalyzed by Silyl Pincer-Type Palladium Complex
J. Takaya, N. Iwasawa
J. Am. Chem. Soc. 130, 15254 (2008). (この論文はAngewandte Chemie誌でHighlightとして紹介されました)
Copper(I)-Catalyzed Carboxylation of Aryl- and Alkenylboronic Esters
J. Takaya, S. Tadami, K. Ukai, N. Iwasawa
Org. Lett., 10, 2697-2700 (2008).
Platinum(II)-Catalyzed Reaction of γ,δ-Ynones with Alkenes for the Construction of 8-Oxabicyclo[3.2.1]octane Skeletons: Generation of Platinum-Containing Carbonyl Ylides from Acyclic Precursors
H. Kusama, K. Ishida, H. Funami, N. Iwasawa
Angew. Chem. Int. Ed. 47, 4903-4905 (2008).
Synthesis of N-Fused Tricyclic Indoles by a Tandem [1,2] Stevens-Type Rearrangement/1,2-Alkyl Migration of Metal-Containing Ammonium Ylides, 
J. Takaya, S. Udagawa, H. Kusama, N. Iwasawa
Angew. Chem. Int. Ed. 47, 4906-4909 (2008).
Synthesis, Structure, and Reactivity of Naphthalyne-Co2(CO)6 Complexes
N. Iwasawa, M. Otsuka, S. Yamashita, M. Aoki, J. Takaya
J. Am. Chem. Soc., 130, 6328-6329 (2008).
Efficient Control of π-Alkyne and Vinylidene Pathways for W(CO)5(L)-Catalyzed Synthesis of Two Types of Nitrogen-Containing Bicyclic Compounds
Y. Onizawa, H. Kusama, N. Iwasawa
J. Am. Chem. Soc., 130, 802-803 (2008).
Chelation-Assisted Photochemical Electrocyclization of 3-Alkenyl-2,2'-bipyridines: Efficient Synthesis of Substituted 1,10-Phenanthrolines
A. Takahashi, Y. Hirose, H. Kusama, N, Iwasawa
Chem. Commun., 2008, 609-611.
Boronic Esters as a System for Crystallization-Induced Dynamic Self-Assembly Equipped with an “On-Off” Switch for Equilibration
N. Iwasawa, H. Takahagi
J. Am. Chem. Soc., 129, 7754-7755 (2007).
Synthesis of Naphthalene Derivatives through Platinum(II)-Catalyzed Reaction of 2-Alkynylbenzoates with Vinyl Ethers
H. Kusama, H. Funami, N. Iwasawa
Synthesis, 2007, 2014-2024.
Intermolecular Addition Reaction to Alkenes of Acylmolybdenum Complexes Generated by Oxidative Addition of Aryl or Alkenyl Halides with Molybdenum(0) Carbonyl Complexes
K. Sangu, T. Watanabe, J. Takaya, N. Iwasawa
Synlett, 2007, 929-933.
Stereoselective Synthesis of Medium-sized Cyclic Compounds through the Intramolecular Michael-type Reaction Utilizing Alkyne–Hexacarbonyldicobalt Complex Formation
K. Inaba, J. Takaya, N. Iwasawa
Chem. Lett., 36, 474-475 (2007).
Ni(0)-Promoted Hydroxycarboxylation of 1,2-Dienes by Reaction with CO2 and O2
M. Aoki, S. Izumi, M. Kaneko, K. Ukai, J. Takaya, N. Iwasawa
Org. Lett., 9, 1251-1253 (2007).
Preparation of Substituted Cyclopentadienes through Platinum(II)-Catalyzed Cyclization of 1,2,4-Trienes
H. Funami, H. Kusama, N. Iwasawa
Angew. Chem. Int. Ed., 46, 909-911 (2007).
W(CO)5(L)-Catalyzed Cyclization of Acetylenic Silyl Enol Ethers for the Preparation of Nitrogen-Containing Cyclic Compounds, A. Grandmarre
H. Kusama, N. Iwasawa
Chem. Lett., 36, 66-67 (2007).
W(CO)5(L)-catalyzed 6-Endo-selective Cyclization and Formal Cope Rearrangement of Allenyl Silyl Enol Ethers
T. Miura, K. Kiyota, H. Kusama, and N. Iwasawa
J. Organomet. Chem., 692, .562-568 (2007).

2002 - 2006

W(CO)5(L)-Catalyzed Tandem Intramolecular Cyclopropanation / Cope Rearrangement for the Stereoselective Construction of Bicyclo[5.3.0]decane Framework
H. Kusama, Y. Onizawa, and N. Iwasawa
J. Am. Chem. Soc., 128, 16500-16501 (2006).
Useful Reactions of Silylated Propargyltungsten or Propargylmolybdenum Species
T. Asakura, T. Kojima, T. Miura, and N. Iwasawa
Angew Chem. Int. Ed., 45, 6874-6877 (2006).
Rhodium(I)-catalyzed Carboxylation of Aryl- and Alkenylboronic Esters with CO2
K. Ukai, M. Aoki, J. Takaya, and N. Iwasawa
J. Am. Chem. Soc., 128, 8706-8707 (2006).
Synthesis of Isochromene Esters Utilizing 1,6-Addition of Nucleophiles to Benzopyranylidenetungsten(0) Complexes
H. Kusama, T. Sawada, A. Okita, F. Shiozawa, and N. Iwasawa
Org. Lett., 8, 1077-1079 (2006).
Intermolecular 1,5-Dipolar Cycloaddition Reaction of Tungsten-Containing Vinyl-azomethine Ylides Leading to Seven-Membered Heterocycles
H. Kusama, Y. Suzuki, J. Takaya, and N. Iwasawa
Org. Lett., 8, 895-897 (2006).
Pt(II)- or Au(III)-Catalyzed [3+2] Cycloaddition of Metal-Containing Azomethine Ylides: Highly Efficient Synthesis of Mitosene Skeleton
H. Kusama, Y. Miyashita, J. Takaya, N. Iwasawa
Org. Lett., 8, 289-292 (2006).
Complexation-Initiated Formal Intramolecular [4+2]-Cycloaddition Reaction for the Construction of Bridged-Type Cycloadducts
N. Iwasawa, K. Inaba, S. Nakayama, and M. Aoki
Angew. Chem. Int. Ed., 44, 7447-7450 (2005).
W(CO)5(L)-Catalyzed Formal Cope Rearrangement of Allenyl Silyl Enol Ethers
T. Miura, K. Kiyota, H. Kusama, and N. Iwasawa
Org. Lett., 7, 1445-1447 (2005).
Rh(I)-Catalyzed Cyclization of 1-Arylprop-2-yn-1-ol Derivatives Utilizing Rhodium 1,4-Migration
H. Yamabe, A. Mizuno, H. Kusama, and N. Iwasawa
J. Am. Chem. Soc.,127, 3248-3249 (2005).
Generation and Reaction of Tungsten-containing Carbonyl Ylides: [3 + 2]-Cycloaddition Reaction with Electron-Rich Alkenes
H. Kusama, H. Funami, M. Shido, Y. Hara, J. Takaya, and N. Iwasawa
J. Am. Chem. Soc.,127, 2709-2716 (2005).
Rhenium(I)-Catalyzed Intramolecular Geminal Carbo-functionalization of Alkynes: Tandem Cyclization of ωω-Acetylenic Dienol Silyl Ethers
H. Kusama, H. Yamabe, Y. Onizawa, T. Hoshino and N. Iwasawa
Angew. Chem. Int. Ed., 44, 468-470 (2005).
Bidentate Amidine Ligands for Nickel(0)-Mediated Coupling of Carbon Dioxide with Unsaturated Hydrocarbons
M. Aoki, M. Kaneko, S. Izumi, K. Ukai, and N. Iwasawa
Chem. Commun., 2004, 2568-2569.
Platinum(II)-Catalyzed Reaction of 2-Alkynylbenzoates or Benzothioates with Vinyl Ethers: A Concise Method for Synthesis of 1-Acyl-4-alkoxy- or 1-Acyl-4-alkylsulfanyl-naphthalene Derivatives
H. Kusama, H. Funami, J. Takaya, and N. Iwasawa
Org. Lett., 6, 605-608 (2004).
W(CO)5(L)-Promoted Cyclization of 1-Iodo-1-alkynes via Iodovinylidene Tungsten Complexes
T. Miura, H. Murata, K. Kiyota, H. Kusama, and N. Iwasawa
J. Mol. Cat. A, 213, 59-71 (2004).
Isolation and Reaction of (Indolin-3-ylidene)pentacarbonyltungsten Generated from Tungsten-Containing Azomethine Ylide
J. Takaya, H. Kusama, and N. Iwasawa
Chem. Lett., 33, 16-17 (2004).
Indium-Mediated ββ-Allylation, ββ-Propargylation, and ββ-Allenylation onto αα,ββ-Unsaturated Ketones: Reactions of in-Situ-Generated 3-tert-Butyldimethylsillyloxyalk-2-enylsulfonium Salts with in-Situ-Generated Organoindium Reagents
K. Lee, H. Kim, T. Miura, K. Kiyota, H. Kusama, S. Kim, N.Iwasawa, and P. H. Lee
J. Am. Chem. Soc., 125, 9682-9688 (2003).
W(CO)5(L)-Catalyzed Endo-Selective Cyclization of Allenyl Silyl Enol Ethers: An Efficient Method for the Cyclopentene Annulation onto αα,ββ-Unsaturated Ketones
T. Miura, K. Kiyota, H. Kusama, K. Lee, H. Kim, S. Kim, P. H. Lee, and N.Iwasawa
Org. Lett., 5, 1725-1728 (2003).
Generation of Reactive Species by One-Electron Reduction of Fischer-Type Carbene Complexes of Group 6 Metals and Their Use for Carbon-Carbon Bond Formations
K. Fuchibe and N. Iwasawa
Chem.-Eur. J., 9, 905-914 (2003).
An Efficient Method for the Cyclopentene Annulation onto αα,ββ-Unsaturated Ketones: W(CO)5(L) Catalyzed 5-Endo-Dig Cyclization of 6-Siloxy-5-en-1-ynes
N. Iwasawa, T. Miura, K. Kiyota, H. Kusama, K. Lee, and P. H. Lee
Org. Lett., 4, 4463-4466 (2002).
A Facile Method for the Synthesis of Polycyclic Indole Derivatives: The Generation and Reaction of Tungsten-Containing Azomethine Ylides
H. Kusama, J. Takaya, and N. Iwasawa
J. Am. Chem. Soc., 124, 11592-11593 (2002).
W(CO)5-Amine Catalyzed Exo- and Endo-Selective Cyclizations of ωω-Alkynyl Silyl Enol Ethers: A Highly Useful Method for the Construction of Polycyclic Compounds
H. Kusama, H. Yamabe, and N. Iwasawa
Org. Lett., 4, 2569-2571 (2002).
Tandem Cyclizations of Benzopyranylidenetungsten(0) Complexes with Electron-Rich Dienes for the Stereoselective Synthesis of Polycyclic Carbon Skeletons
H. Kusama, Y. Shiozawa, M. Shido, and N. Iwasasa
Chem. Lett., 124-125 (2002).
Reactions of Iodinated Vinylidene Complexes Generated from 1-Iodo-1-alkynes and W(CO)5•THF
T. Miura and N. Iwasawa
J. Am. Chem. Soc., 124, 518-519 (2002).

1997 - 2001

Reactions of Silyl-substituted Fischer-type Carbene Complexes with Silanes
N. Iwasawa, M. Saitou, and H. Kusama
J. Organomet. Chem., 617-618, 741-743 (2001).
Generation and Reaction of Metal-Containing Carbonyl Ylides: Tandem [3+2]-Cycloaddition-Carbene Insertion Leading to Novel Polycyclic Compounds
N. Iwasawa, M. Shido, and H. Kusama
J. Am. Chem. Soc., 123, 5814-5815 (2001).
A Novel Reaction for Annulation onto αα,ββ-Unsaturated Ketones : W(CO)5•L Promoted Exo and Endo Selective Cyclizations of ωω-Acetylenic Silyl Enol Ethers Prepared by 1,4-Addition of Propargyl Malonate to Enones
N. Iwasawa, K. Maeyama, and H. Kusama
Org. Lett., 3, 3871-3873 (2001).
Complexation-Initiated Intramolecular Diels-Alder Reaction
N. Iwasawa, F. Sakurada, and M. Iwamoto
Org. Lett., 2, 871-873 (2000).
A Novel Use of the Anions of Fischer-type Carbene Complexes as Alkenyl Metallic Species
K. Fuchibe and N. Iwasawa
Tetrahedron, 56, 4907-4915 (2000).
Novel Synthesis of Pentacarbonylbenzopyranylidenetungsten(0) Complexes and their Diels-Alder Reaction with Electron-Rich Alkenes
N. Iwasawa, M. Shido, K. Maeyama, and H. Kusama
J. Am. Chem. Soc., 122, 10226-10227 (2000).
Reactions of Novel Reactive Species Generated by Samarium(II)-mediated One-electron Reduction of Fischer-type Carbene Complexes
K. Fuchibe and N. Iwasawa
Org. Lett., 2, 3297-3299 (2000).
Synthesis of Medium-Sized Bicyclic Compounds by Intramolecular Cyclization of Cyclic β-Keto Radicals Generated from Cyclopropanols Using Manganese(III) Tris(2-pyridinecarboxylate) and its Application to Total Synthesis of 10-Isothiocyanatoguaia-6-ene
N. Iwasawa, M. Funahashi, S. Hayakawa, T. Ikeno, and K. Narasaka
Bull. Chem. Soc. Jpn., 72, 85-97(1999).
W(CO)5•THF-Catalyzed Electrocyclizations of Aromatic Enynes via Vinylidene Intermediates
K. Maeyama and N. Iwasawa
J. Org. Chem., 64, 1344-1346 (1999).
A Novel Synthesis of 4,5-Didehydrotropone-Co2(CO)4•dppm Complexes
N. Iwasawa and H. Satoh
J. Am. Chem. Soc., 121, 7951-7952 (1999).
W(CO)5•THF-Catalyzed Endo Selective Cyclization of ωω-Acetylenic Silyl Enol Ethers
K. Maeyama and N. Iwasawa
J. Am. Chem. Soc., 120, 1928-1929 (1998).
Rearrangement of 1-(1-Alkynylcyclopropanols to 2-Cyclopentenones via their Hexacarbonyldicobalt Complexes---A New Use of Alkyne-Co2(CO)6 Complexes in Organic Synthesis---
N. Iwasawa, T. Matsuo, M. Iwamoto, and T. Ikeno
J. Am. Chem. Soc., 120, 3903-3914 (1998).
Concise Synthesis of Fully-Substituted Furan, Pyrrole, Butenolide and 2-Butene-4-lactam Esters
N. Iwasawa, T. Ochiai, and K. Maeyama
J. Org. Chem., 63, 3164-3165 (1998).
Lewis Acid Promoted Disproportionation Reaction of Aromatic Vinyl Ethers and Acetals and its Application to the Synthesis of Paracotoin
Y. D. Gong, H. Tanaka, N. Iwasawa, and K. Narasaka
Bull. Chem. Soc. Jpn., 71, 2181-2185 (1998).
Synthesis of αα-Methoxy-αα,ββ-unsaturated Esters by Iodine-oxidation of the Anions of Fischer-type Carbene Complexes
N. Iwasawa and K. Fuchibe
Chem. Lett., 1998, 1149-1150.
Generation of Propargyl Metallic Species by the Addition Reactions of Alkynyllithiums to Fischer-type Carbene Complexes
N. Iwasawa, K. Maeyama, and M. Saitou
J. Am. Chem. Soc., 119, 1486-1487 (1997).
Synthesis of Polycyclic Compounds by the Reaction of Co2(CO)6 Complexed 1-[o-Alkynylphenyl]cyclopropanols
N. Iwasawa and T. Matsuo
Chem. Lett., 1997, 341-342.
A Highly Efficient Synthesis of (-)-PI-091. Construction of 4-Alkoxy-2-butene-4-lactam Skeleton from Fischer-type Carbene complex, Alkynyllithium, and Tosyl Isocyanate
N. Iwasawa and K. Maeyama
J. Org. Chem., 62, 1918-1919 (1997).
Transformation Reaction of 1-(1,2-Propadienyl)cyclopropanols into Substituted Hydroquinones Employing Octacarbonyldicobalt
Y. Owada, T. Matsuo, and N. Iwasawa
Tetrahedron, 53, 11069-11086 (1997).
Observation and Iodine Oxidation of the Protonated Anionic Propargyl Tungsten Species Formed in the Reaction of Fischer-type Carbene Complexes with Alkynyllithiums
N. Iwasawa, T. Ochiai, and K. Maeyama
Organometallics, 16, 5137-5139 (1997).