Asymmetric hydrogenation of prochiral carboxylic acids and functionalized carbonyl compounds catalysed by ruthenium(II)-binap complexes with aryl nitriles (binap = (R)- or (S)-2,2′-bis(diphenylphosphino)-1,1′-binaphthyl)
作者:Liming Shao、Kasumi Takeuchi、Makoto Ikemoto、Toshiyasu Kawai、Masamichi Ogasawara、Hiroshi Takeuchi、Hiroyuki Kawano、Masahiko Saburi
DOI:10.1016/0022-328x(92)83466-u
日期:1992.2
Complexes RuCl2(ArCN)2(binap), II (binap = (R)- or (S)-2,2′-bis(diphenylphosphino)- 1,1′-binaphthyl; ArCN = benzonitrile, a; 2-furancarbonitrile, b; pentafluorobenzonitrile, c) were prepared, and their solution properties were investigated by 31P NMR measurements. The catalytic activities and enantioselectivities for IIa–c catalysed hydrogenation of some prochiral acids were very similar to those provided
配合物RuCl 2(ArCN)2(binap),II(binap =(R)-或(S)-2,2'-双(二苯基膦基)-1,1'-联萘基; ArCN =苄腈,a; 2-呋喃腈; b;五氟苄腈,c)被制备,并且它们的溶液性质通过31 P NMR测量来研究。IIa–c催化某些手性酸的氢化反应的催化活性和对映选择性与Ru 2 Cl 4(binap)2(NEt 3)提供的催化活性和对映选择性非常相似。),I。然而,在β-官能化羰基化合物的氢化中,IIa–c与复合物I相比,活性和/或选择性大大降低。 II中的ArCN。