研究者詳細 - 西原　康師

論文 - 西原　康師

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Pd-P(t-BU)(3)-catalyzed consecutive cross-coupling of p-phenylenedizinc compound with two different electrophiles leading to unsymmetrically 1,4-disubstituted benzenes

Takahiro Kawamoto, Shogo Ejiri, Kana Kobayashi, Shunsuke Odo, Yasushi Nishihara, Kentaro Takagi

JOURNAL OF ORGANIC CHEMISTRY 73 ( 4 ) 1601 - 1604 2008年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

[GRAPHICS]
Pd-P(t-BU)(3) was found to be a chemoselective catalyst for the reaction of p-phenylenedizinc compound with equimolar amounts of carbon electrophiles to afford the single cross-coupling products in good yields, effectively suppressing the formation of double cross-coupling products. The subsequent additions of other electrophiles to the resulting solutions caused the second cross-coupling of the incipient products to take place, achieving a novel and efficient one-pot synthesis of unsymmetrically 1,4-disubstituted benzenes. The origin of the observed high chemoselectivity was speculated.

DOI： 10.1021/jo702103r

Zirconocene-mediated highly regio- and stereoselective synthesis of multisubstituted olefins starting from 1-alkynylboronates 査読

Yasushi Nishihara, Mitsuru Miyasaka, Masanori Okamoto, Hideki Takahashi, Eiji Inoue, Kenki Tanemura, Kentaro Takagi

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 129 ( 42 ) 12634 - + 2007年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

Multisubstituted olefins are efficiently prepared by the zirconocene-mediated regio- and stereoselective coupling between 1alkynylboronates and ethylene, followed by sequential transformation in moderate to high yields. The proper combination of substrates and reaction conditions is important for high yields. The synthesis of various tetra substituted alkenes in a regio- and stereocontrolled manner is described. This methodology has been applied to the synthesis of (Z )-tamoxifen in a concise, regio and stereoselective manner. This multicomponent coupling strategy involves the characteristics of 1-alkynylboronates toward high selectivities followed by palladium(O)-mediated cross-coupling with aryl halides.

DOI： 10.1021/ja075234y

Preparation, structures, and thermal reactivity of alkoxycarbonyl(cyano)palladium(II) complexes trans-Pd(COOR)(CN)(PPh3)(2) (R = Me, Et, Pr-n, Pr-i, Bu-n, Bu-t, and Bn) as intermediates of the palladium-catalyzed cyanoesterification of norbornene derivatives

Yasushi Nishihara, Mitsuru Miyasaka, Yoshiaki Inoue, Tomoka Yamaguchi, Masaaki Kojima, Kentaro Takagi

ORGANOMETALLICS 26 ( 16 ) 4054 - 4060 2007年7月

記述言語：英語出版者・発行元：AMER CHEMICAL SOC

Alkoxycarbonyl(cyano)palladium(II) complexes trans-Pd(COOR)(CN)(PPh3)(2) (1, R = Me; 2, R = Et; 3, R = Pr-n; 4, R = Pr-i; 5, R = Bu-n; 6, R = Bu-t; 7, R = Bn) are prepared via oxidative addition of the corresponding cyanoformates to Pd(PPh3)(4) in toluene at room temperature or 50 degrees C and characterized by means of NMR (H-1, C-13{H-1}, and P-31{H-1}) and IR spectroscopy as well as elemental analyses. X-ray crystallography of 3, 4, and 6 showed a square-planar coordination around the Pd center that is bonded to alkoxycarbonyl and cyano ligands in the trans configuration. The Pd-CN and Pd-COOR bonds in 1, 3, 4, and 6 are similar to those of the cyanopalladium(II) and alkoxycarbonylpalladium(II) complexes reported to date. On reaction of Pd(PPh3)(4) with phenyl cyanoformate a thermally induced ligand exchange takes place to afford the dicyanopalladium(II) complex, trans-Pd(CN)(2)(PPh3)(2) (8). Complex 2 is able to catalyze the reaction of norbornadiene with ethyl cyanoformate to produce (2R*,3S*)-ethyl 3-cyanobicyclo[2.2.1]hept-5-ene-2-carboxylate (13) and is recovered after the reaction. This observation supports the identification of alkoxycarbonyl(cyano)palladium(II) complexes as intermediates in the catalytic cycle of cyanoesterification of norbornene derivatives.

DOI： 10.1021/om700343y

Living ring-opening metathesis polymerization of Exo-norbornenes bearing both cyano and ester functionalities by a well-defined ruthenium catalyst

Yasushi Nishihara, Yoshiaki Inoue, Akira T. Saito, Yuushou Nakayama, Takeshi Shiono, Kentaro Takagi

POLYMER JOURNAL 39 ( 4 ) 318 - 329 2007年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SOC POLYMER SCIENCE JAPAN

Exo-ethyl 3-cyanobicyclo[2.2.1]hept-5-ene-2-carboxylate (A) and exo-(n)butyl 3-cyanobicyclo[2.2.1]-hept-5-ene-2-carboxylate (B) bearing both cyano and ester groups were subjected to homopolymerization by ring-opening metathesis polymerization with a well-defined Ru catalyst, (H(2)IMes)(3-bromopyridine)(2)Cl2Ru=CHPh (3) (H(2)IMes = N,N'-bis(mesityl)-4,5-dihydroimidazol-2-ylidine) at low temperature. The characterization of the synthesized homopolymers by GPC analyses showed a value of a number-average molecular weight (Mn) as high as 296,000 and a narrow polydispersity index (< 1.06). The results imply that the initiator 3 had a compatibility of the polar functional groups and promoted fairly well-defined living polymerization. The glass transition temperatures of the homopolymers obtained from monomer A were significantly higher than those observed for polymers from monomer B obtained under the same reaction conditions. The rates of homopolymerizations of monomer A, B, and the parent norbornene (C) were determined by the monitoring the consumption of the monomers by the H-1 NMR spectra. It was revealed that the polymerization rate for the homopolymerization of monomer A was almost same as that of monomer B, but much slower than that of C. On the basis of the successful homopolymerization, the synthesis of block and random copolymers derived from monomers A, B, and C via living polymerization using catalyst 3 was also accomplished.

DOI： 10.1295/polymj.PJ2006129

1,1,3,3-Tetrakis(alkylthio)-1,3-dilithio-2-silapropanes: useful reagents for the synthesis of polysilacycloalkanes via dianionic ring formation

Masaki Shimizu, Masayuki Iwakubo, Yasushi Nishihara, Katsunari Oda, Tamejiro Hiyama

ARKIVOC 29 - 48 2007年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ARKAT USA INC

Treatment of 1,1,3,3-tetrakis(alkylthio)-2-silapropanes with t-BuLi in THF at -40 degrees C generated 1,1,3,3-tetrakis(alkylthio)-1,3-dilithio-2-silapropanes which reacted with various bifunctional chlorosilanes to give the corresponding 4- to 7-membered polysilacycloalkanes in moderate to good yields. Furthermore, double alkylation of the dilithiated silanes with bis(halomethyl)diorganosilanes or dihaloalkanes was found to proceed smoothly giving rise to 1,4-disilacyclohexanes or silacycloalkanes in good yields, respectively, in THF and an aprotic polar co-solvent such as hexamethylphosphoric triamide (HMPA) or 1,1,3,3-tetramethylurea (TMU). The sulfenyl groups in the cyclized products were smoothly removed by radical reduction with tributyltin hydride.

1,1,3,3-Tetrakis(alkylthio)-1,3-dilithio-2-silapropanes: Useful reagents for the synthesis of polysilacycloalkanes via dianionic ring formation

Masaki Shimizu, Masayuki Iwakubo, Yasushi Nishihara, Katsunari Oda, Tamejiro Hiyama

Arkivoc 2007 ( 10 ) 29 - 48 2007年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Arkat

Treatment of 1,1,3,3-tetrakis(alkylthio)-2-silapropanes with t-BuLi in THF at -40°C generated 1,1,3,3-tetrakis(alkylthio)-1,3-dilithio-2-silapropanes which reacted with various bifunctional chlorosilanes to give the corresponding 4- to 7-membered polysilacycloalkanes in moderate to good yields. Furthermore, double alkylation of the dilithiated silanes with bis(halomethyl)diorganosilanes or dihaloalkanes was found to proceed smoothly giving rise to 1,4-disilacyclohexanes or silacycloalkanes in good yields, respectively, in THF and an aprotic polar co-solvent such as hexamethylphosphoric triamide (HMPA) or 1,1,3,3-tetramethylurea (TMU). The sulfenyl groups in the cyclized products were smoothly removed by radical reduction with tributyltin hydride. ©ARKAT-USA, Inc.

DOI： 10.3998/ark.5550190.0008.a05

Cyanoesterification of norbornenes catalyzed by palladium: facile synthetic methodology to introduce cyano and ester functionalities via direct carbon-carbon bond cleavage of cyanoformates

Yasushi Nishihara, Yoshiaki Inoue, Seisuke Izawa, Mitsuru Miyasaka, Kenki Tanemura, Kiyohiko Nakajima, Kentaro Takagi

TETRAHEDRON 62 ( 42 ) 9872 - 9882 2006年10月

記述言語：英語出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD

Addition of cyanoformates (NC-COOR) to norbornene at 110 degrees C in the presence of Pd(PPh(3))(4) (10 mol %) as a catalyst affords with high selectivity the corresponding doubly functionalized polar norbornane derivatives bearing both cyano and ester groups. By using benzonorbornadiene and norbornadienes as the substrates, the reaction can be extended to synthesis of various functionalized norbornene derivatives in moderate to excellent yields. In most cases alkyl groups such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, tert-butyl, and benzyl in the ester functionalities are applicable to the reactions. Oxidative addition of cyanoformates to Pd(0), insertion of norbornenes, and reductive elimination of the corresponding adducts constitute the proposed catalysis pathway. (c) 2006 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.tet.2006.08.025

Comparative reactivity of exo- and endo-isomers in the Ru-initiated ring-opening metathesis polymerization of doubly functionalized norbornenes with both cyano and ester groups

Yasushi Nishihara, Yoshiaki Inoue, Yuushou Nakayama, Takeshi Shiono, Kentaro Takagi

MACROMOLECULES 39 ( 22 ) 7458 - 7460 2006年10月

Novel Rh catalysis in cross-coupling between alkyl halides and arylzinc compounds possessing ortho-COX (X = OR, NMe2, or Ph) groups

Hideki Takahashi, Shinya Inagaki, Yasushi Nishihara, Takanori Shibata, Kentaro Takagi

ORGANIC LETTERS 8 ( 14 ) 3037 - 3040 2006年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

[GRAPHICS]
Rh-dppf was found to be an efficient catalyst for the cross-coupling between primary alkyl halides bearing beta-hydrogens and arylzinc compounds possessing carbonyl groups such as ester, amide, or ketone at the ortho position. Various functional groups such as ester, nitrile, or acyloxylate moieties on the halides were tolerated under the catalysis conditions. Arylzinc compounds free of ortho-carbonyl groups reacted well with ethyl 3-iodopropanoate, suggesting that the essential intramolecular interaction between carbonyl groups and Rh promotes the reductive elimination.

DOI： 10.1021/ol060969d

Synthesis of functionalized benzylsilanes from arylzinc compounds and (iodomethyl)trimethylsilane by means of a novel Rh catalysis

H Takahashi, KM Hossain, Y Nishihara, T Shibata, K Takagi

JOURNAL OF ORGANIC CHEMISTRY 71 ( 2 ) 671 - 675 2006年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

[GRAPHICS]
The catalytic activity of a Rh complex in cross-coupling between ArZnI and TMSCH2I was examined in which the Rh complex, generated in situ from [RhCl(1,5-cyclooctadiene)](2) and 1,1'-bis(diphenylphosphino)ferrocene, exhibited excellent catalytic activity for the production of various functionalized benzylsilanes in good yields. From P-31 NMR studies of various solutions containing several of the reaction components, confirmation of the rapid and quantitative transfer of aryl groups from ArZnI to the Rh complex to form arylrhodium species was ascertained. A catalytic cycle, commencing with the transmetalation, was thus proposed for the reaction.

DOI： 10.1021/jo0520994

Preparation and polymerization of doubly functionalized polar norbornene derivatives

Yasushi Nishihara, Yoshiaki Inoue, Kentaro Takagi

Polymer Preprints, Japan 55 ( 1 ) 220 2006年

記述言語：日本語掲載種別：研究論文（国際会議プロシーディングス）

We have previously reported the palladium-catalyzed cyanoesterification of norbornene derivatives with ethyl cyanoformate. Herein we report that the same reaction of norbornadiene with various alkyl cyanoformates (alkyl = Me, Et, nPr, iPr, nBu, tBu, and Bn) can smoothly undergo to afford doubly polar functionalized norbornene derivatives. This reaction is a novel and efficient method to obtain a monomer having both cyano and ester groups with exo-selectivity. The formed norbornene derivatives were polymerized through ring-opening metathesis polymerization (ROMP) by the second generation Grubbs' catalyst. The results of gel permeation Chromatographic (GPC), thermogravimetric (TG), and differential scanning calorimeter (DSC) analyses of the obtained polymers will also be discussed.

Synthesis of symmetrical 1,3-butadiynes by homocoupling reactions of alkynylboronates mediated by a copper salt

Y Nishihara, M Okamoto, Y Inoue, M Miyazaki, M Miyasaka, K Takagi

TETRAHEDRON LETTERS 46 ( 50 ) 8661 - 8664 2005年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD

Alkynylboronates are employed as a practical and versatile precursor for a variety of it-conjugated organic compounds. In the presence of a Cu(I) or Cu(II) salt, transformation of alkynylboronates into the corresponding 1,3-diynes upon exposure to air takes place readily in aprotic polar solvents such as DMI. (c) 2005 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.tetlet.2005.10.056

Ring-opening isomerization of methylenecyclopropanes catalyzed by hydridorhodium(I) complexes

M Itazaki, Y Nishihara, H Takimoto, C Yoda, K Osakada

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 241 ( 1-2 ) 65 - 71 2005年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

2-Phenyl-1-methylenecyclopropane is isometized into 2-phenyl-1,3-butadiene and 1-phenyl-1,3-butadiene in the presence of catalytic amounts of RhH(CO)(PPh3)(3) and RhH(PPh3)(4). The Rh-containing product of the reactions has a 2-phenyl-1-methylallyl (or 1-phenyl-1-methylallyl) ligand, and is formed also from the reaction of 2-phenyl-1,3-butadiene with RhH(CO)(PPh3)(3). RhH(CO)(PPh3)(3) promotes ring-opening isomerization of 4-phenyl-1-methylenespiro[2,2]pentane to afford Rh[eta(3)-anti-CH2C{C(=CH2)Ph}CHCH3](PPh3)(2) (2) at 50 degrees C and Rh{kappa(1),eta(2)-CH2CH(Ph)C(=CH2)CH=CH2}(CO)(PPh3)(2) (3) at -35 degrees C. X-ray crystallography of 2 shows the pi-allylic ligand having a methyl group at anti position. The mechanism for formation of 2 via intermediate 3 is discussed. (c) 2005 Elsevier B.V All rights reserved.

DOI： 10.1016/j.molcata.2005.06.045

Preparation of Pd(PPh2H)(2)(PPh3)(2) and its role as a precursor of a dinuclear complex with bridging phosphide ligands

M Itazaki, Y Nishihara, K Osakada

TRANSITION METAL CHEMISTRY 30 ( 7 ) 828 - 830 2005年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

Reaction of PPh2H with Pd(PPh3)(4) in a 4:1 molar ratio produced the Pd complex with two diphenylphosphine ligands, Pd(PPh2H)(2)(PPh3)(2) (1). Complex (1) was characterized by n.m.r. (H-1 and P-31{H-1}) spectra as well as by elemental analysis. Reaction of (1) with RhCl(PPh3)(3) yielded a Pd-Rh heterobimetallic complex with bridging phosphide ligands, formulated as [(Ph3P)(2)Pd(mu-PPh2)(2)Rh(PPh3)(2)]Cl (2).

DOI： 10.1007/s11243-005-6408-x

Hexanuclear Pt complexes composed of two cyclic triplatinum units connected with 1,4-diphenylene and 1,1 '-ferrocenylene spacer

M Itazaki, O Kitami, M Tanabe, Y Nishihara, K Osakada

JOURNAL OF ORGANOMETALLIC CHEMISTRY 690 ( 17 ) 3957 - 3962 2005年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE SA

1,4-Bis(dimethylsilyl) benzene reacted with [Pt3H(PEt3)(3)(mu-PPh2)(3)] at room temperature to yield trinuclear Pt complex [Pt-3(SiMe2C6H4SiMe2H)(PEt3)(2) (mu-PPh2)(3)] (1a). Heating a solution containing an equimolar mixture of [Pt3H(PEt3)(3)mu PPh2)(3)] and 1a at 60 degrees C produced a hexanuclear Pt complex [(PEt3)(2)( mu-PPh2)(3)Pt-3(SiMe2C6H4SiMe2)Pt-3(PEt3)(2)(mu-PPh2)(3)] (2a). Complex 1a was characterized by X-ray crystallography and NMR spectroscopy, while the structure of 2a was determined by X-ray crystallography of single crystals containing 2a and [Pt3H2(PEt3)(2)(mu-PPh2)(4)] in 1:1 ratio. [Pt-3(SiMe(2)fcSiMe(2)H)(PEt3)(2)( mu-PPh2)(3)] (fc = Fe(eta(5)-C5H4)(2)) (1b) and [(PEt3)(2) (mu-PPh2)(3)Pt-3(SiMe(2)fcSiMe(2))Pt-3(PEt3)(2)(mu-PPh2)(3)] (2b) were obtained similarly from the reactions of 1,1 '-bis(dimethyisilyl)ferrocene with [Pt3H(PEt3)(3)(mu-PPh2)(3)] and characterized by NMR spectroscopy and elemental analyses. (c) 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jorganchem.2005.05.030

Room-temperature palladium-catalyzed and copper(I)-mediated coupling reactions of acid chlorides with boronic acids under neutral conditions

Y Nishihara, Y Inoue, M Fujisawa, K Takagi

SYNLETT ( 15 ) 2309 - 2312 2005年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：GEORG THIEME VERLAG KG

The palladium-catalyzed cross-coupling reactions of acid chlorides with arylboronic acids in the presence of copper(l) thiophene-2-carboxylate (CuTC) as an activator under strictly nonbasic and mild reaction conditions afford the unsymmetrical ketones in moderate to excellent yields. A wide range of substrates bearing an electron-donating or an electron-withdrawing substituent on the aromatic ring is compatible.

DOI： 10.1055/s-2005-872661

Arylplatinum complexes with arylboronate ligands. Their preparation, structure, and relevance to transmetalation

Pantcheva, I, Y Nishihara, K Osakada

ORGANOMETALLICS 24 ( 16 ) 3815 - 3817 2005年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

The reactions of arylboronic acids with transPtPh(I)(PMe2Ph)(2) afford new arylboronato platinum complexes, trans-PtPh(OB(OH)Ar)(PMe2Ph)(2), and diarylplatinum complexes, trans-PtPh(Ar)(PMe2Ph)(2).

DOI： 10.1021/om049050t

Selective C-C bond activation of 2-aryl-1-methylenecyclopropanes promoted by Ir(I) and Rh(I) hydrido complexes. Mechanism of ring-opening isomerization of the strained molecules

Y Nishihara, C Yoda, M Itazaki, K Osakada

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 78 ( 8 ) 1469 - 1480 2005年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：CHEMICAL SOC JAPAN

[IrH(CO)(PPh3)(3)] promotes ring opening of 2-phenyl-l-methylenecyclopropane at room temperature to produce the Ir complex with a chelating 2-phenyl-3-butenyl ligand, [Ir{eta(2)-CH2CH(Ph)CH=CH2-kappa C-1}(CO)(PPh3)(2)] (1). The reaction of excess 2-phenyl-l-methylenecyclopropane with [IrH(CO)(PPh3)(3)] at 50 degrees C yields [Ir{eta(2)-(o-C6H4)CH(Me)CH= CH2-kappa C-1)(CO)(PPh3)(2)] (2), accompanied by the formation of 1-phenyl-1,3-butadiene and 2-phenyl-1.3-butadiene. 2,2-Diphenyl-l-methylenecyclopropane reacts with [IrH(CO)(PPh3)(2)] to afford [Ir{eta(2)-CH2-CPh2CH=CH2-kappa C-1}(CO)-(PPh3)(2)] (3) at 50 degrees C and [Ir{eta(2)-(o-C6H4)CMe(Ph)CH=CH2-kappa C-1)(CO)(PPh3)(2)] (4) at 100 degrees C. Heating a solution of 3 at 100 degrees C also forms 4 quantitatively. X-ray crystallography of 3 reveals a penta-coordinated structure around the Ir center bonded to a chelating 2,2-diphenyl-3-butenyl ligand. The reactions of 2,2-diphenyl-l-methylenecyclopropane and of 2,2-di(4-fluorophenyt)-1-methylenecyclopropane with [RhH(CO)(PPh3)(3)] at room temperature yield [Rh{eta(2)- CH2CAr2CH=CH2-kappa C-1}(CO)(PPh3)(2)] (5a: Ar = Ph, 5b: Ar = C6H4-F-4). The reactions at 50 degrees C cause ring opening of the substrate and orthometalation of the phenyl group to afford [Rh{eta(2)-(o-C6H4)CMe(Ph)CH=CH2-kappa C-1}-(CO)(PPh3)(2)](6a) and [Rh{eta(2)-(o-C6H3-F-4)CMe(C6H4-F-4)CH=CH2-kappa C-1}(CO)(PPh3)(2)](6b), respectively. Formation of 1,1-diaryl-1,3-butadiene is observed during the reaction. Heating a solution of 5a at 50 degrees C produces 1,1-diphenyl-1,3-butadiene and an allylrhodium complex, 8, rather than 6a, although the reaction of excess 2,2-diphenyt-1-methylenecyclopropane with 5a at 50 degrees C affords 6a in 60 %. The mechanisms of the above reactions are discussed based on the products and reaction rates. Coordination of P(OMe)(3) to the Rh center of 5a causes insertion of the CO ligand into the Rh-C bond to afford [Rh{eta(2)-CO-CH2CPh2CH=CH2-kappa C-1}(P(OMe)(3))(3)] (7).

DOI： 10.1246/bcsj.78.1469

Dinuclear Pt(II) and Pd(I) complexes with bridging PPh2 ligands from the reaction of PPh2H with zero-valent complexes of these metals

M Tanabe, M Itazaki, O Kitami, Y Nishihara, K Osakada

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 78 ( 7 ) 1288 - 1290 2005年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：CHEMICAL SOC JAPAN

Reactions of PPh2H with [M(PCy3)(2)] (M = Pt, Pd) produce the dinuclear complexes with bridging PPh2 ligands of these metals, [{Pt(H)(PCy3)}(2)(mu-PPh2)(2)] and [{Pd-(PCy3)}(2)(mu-PPh2)(2)], respectively.

DOI： 10.1246/bcsj.78.1288

Palladium-catalyzed cyanoesterification of norbornenes with cyanoformates via the NC-Pd-COOR (R = Me and Et) intermediate

Y Nishihara, Y Inoue, M Itazaki, K Takagi

ORGANIC LETTERS 7 ( 13 ) 2639 - 2641 2005年6月

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