Asymmetric hydrogenation of prochiral carboxylic acids catalyzed by the five-coordinate ruthenium(II)-hydride complex [RuH(binap)2]PF6(binap = R- or S-2,2′-bis(diphenylphosphino)-1,1′-binaphthyl)
作者:Masahiko Saburi、Hiroshi Takeuchi、Masamichi Ogasawara、Touru Tsukahara、Youichi Ishii、Takao Ikariya、Tamotsu Takahashi、Yasuzo Uchida
DOI:10.1016/0022-328x(92)83226-8
日期:1992.4
The five-coordinate complex [RuH(binap)2]PF6 (I, binap = (R)- or (S)-2,2′-bis(diphenylphosphino)-1,1′-binaphthyl) has been found to have sufficient catalytic activity for asymmetric hydrogenation of itaconic acid and other prochiral carboxylic acids under mild conditions. The catalytic hydrogenation of itaconic acid by I was examined under a variety of conditions, and the addition of triethylamine
发现五配位络合物[RuH(binap)2] PF 6(I,binap =(R)-或(S)-2,2'-双(二苯基膦基)-1,1'-联萘基)在温和条件下具有足够的催化活性,可用于衣康酸和其他前手性羧酸的不对称氢化。在多种条件下检查了衣康酸在1条件下的催化氢化作用,发现添加三乙胺可实现高对映选择性(> 90%ee)。在类似于氢化的条件下对I和衣康酸的反应混合物进行的1 H和31 P NMR检查表明,形成了含有一种双酚的螯合物的钌。