Christophe Copéret
Purdue University
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Publication
Featured researches published by Christophe Copéret.
Tetrahedron Letters | 1994
Christophe Copéret; Ei-ichi Negishi; Zhenfeng Xi; Tamotsu Takahashi
Abstract 3-Zircona-1-cyclopentenes and zirconacyclopentanes react with aldehydes at or below 25 °C to give the corresponding carbonyl addition products, i.e., 7-membered oxazirconacycles, which can be readily converted to the corresponding alcohols via protonolysis and 5-iodoalcohols via iodinolysis; the latter product can be further converted to 7-membered lactones via Pd-catalyzed carbonylation.
Tetrahedron | 1994
E. Negishi; Christophe Copéret; Takumichi Sugihara; Izumi Shimoyama; Yantao Zhang; Guangzhong Wu; James M. Tour
Abstract The Pd-catalyzed carbonylative cyclization reaction involving ω-acyl-substituted acylpalladium derivatives can proceed via intramolecular trapping with either C- or O-enolates; the preferential formation of either 5- or 6-membered rings dictates the C-to-O ratio in the trapping with enolates.
Tetrahedron Letters | 1995
Christophe Copéret; Takumichi Sugihara; Ei-ichi Negishi
Abstract Trapping of acylpalladium derivatives can be achieved using internal carboxamides and sulfonamides, in addition to simple amines and applied to termination of carbopalladation to produce lactams.
Tetrahedron | 1996
Christophe Copéret; Shengming Ma; Takumichi Sugihara; Ei-ichi Negishi
Abstract Termination of cyclic carbopalladation of alkynes via carbonylative lactamization can be achieved more satisfactorily with alkenyl or aryl halides containing an ω-sulfonamido group than with those containing an ω-amino group. The method appears to be generally satisfactory for the preparation of fused cyclic systems consisting of six-membered rings, while the other cases require further development.
Chemical Reviews | 1996
Ei-ichi Negishi; Christophe Copéret; Shengming Ma; and Show-Yee Liou; Fang Liu
Journal of the American Chemical Society | 1996
Ei-ichi Negishi; Christophe Copéret; Shengming Ma; Takeshi Mita; Takumichi Sugihara; James M. Tour
Journal of the American Chemical Society | 1995
Christophe Copéret; Takumichi Sugihara; Guangzhong Wu; Izumi Shimoyama; Ei-ichi Negishi
Journal of the American Chemical Society | 1994
Takumichi Sugihara; Christophe Copéret; Zbyslaw Owczarczyk; Lori S. Harring; Ei-ichi Negishi
Journal of the American Chemical Society | 1996
Ei-ichi Negishi; Shengming Ma; John Amanfu; Christophe Copéret; Joseph A. Miller; James M. Tour
Organic Letters | 1999
Christophe Copéret; Ei-ichi Negishi