Biphosphole: A C-2 symmetry chiral bidentate ligand. Synthesis and characterization of nickel, palladium, platinum, and rhodium complexes

被引：33

作者：

Gouygou, M ^{[1
]}

Tissot, O ^{[1
]}

Daran, JC ^{[1
]}

Balavoine, GGA ^{[1
]}

机构：

[1] CNRS,CHIM COORDINAT LAB,F-31077 TOULOUSE,FRANCE

来源：

ORGANOMETALLICS | 1997年 / 16卷 / 05期

关键词：

D O I：

10.1021/om960717o

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Owing to the C-2 symmetry structure of 1,1'-diphenyl-3,3',4,4'-tetramethyl-2,2'-biphosphole, 1 (BIPHOS), we investigated the coordination of this chiral bidentate ligand to transition metals in order to explore the potential of these complexes in asymmetric catalysis. Nickel, palladium, and platinum complexes [M(BIPHOS)X(2)] (2 (M = Ni, X = Br), 3 (M = Pd, X = Cl), 4 (M = Pt, X = Cl) were synthesized and fully characterized. Their structures were determined by X-ray crystallography. The cationic palladium complexes [Pd(BIPHOS)(CH3-CN)(2)](BF4)(2), 6, and [Pd(BIPHOS)(eta(3)-C3H5)]Cl, 7, were also synthesized. The pi-allylpalladium complex 7 reveals a potential interest for catalytic allylic substitution. The reaction of 1 with [Pd(CH3CN)(4)](BF4)(2) leads to the formation of the meso diastereoisomer [Pd(BIPHOS)(2)] (BF4)(2), 5, which was fully characterized. Its structure was determined by X-ray crystallography. A bis(BIPHOS) complex of Rh(I), 8, was also obtained by reaction of 1 with [Rh(COD)Cl](2) or [Rh(COD)(2)]BF4.

引用

页码：1008 / 1015

页数：8