Asymmetric Synthesis of the Roche Ester and its Derivatives by Rhodium‐INDOLPHOS‐Catalyzed Hydrogenation
作者:Jeroen Wassenaar、Mark Kuil、Joost N. H. Reek
DOI:10.1002/adsc.200800209
日期:2008.7.7
lpropionate, known as the Roche ester, and several of its derivatives were successfully synthesized through asymmetric rhodium-catalyzed hydrogenation, using INDOLPHOS (diisopropyl1-[(S)-3,5-dioxa-4-phosphacyclohepta[2,1-a;3,4-a′]dinaphthalen-4-yl]-3-methyl-2-indolyl}phosphine) as the chiral ligand, in excellent yield and the highest ee reported up to now (TOF over 5500 h−1 at 25 °C; up to 98% ee
(S)-3-羟基-2-甲基丙酸酯(称为Roche酯)及其一些衍生物是使用INDOLPHOS(二异丙基1-[(S)-3,5- dioxa)通过不对称铑催化的氢化反应成功合成的作为手性配体的-4-膦酰基环庚[[2,1- a ; 3,4- a' ]二萘基-4-基] -3-甲基-2-吲哚基}膦)具有优异的收率,据报道,最高ee现在(25°C下5500 h -1下的TOF ;-40°C下ee高达98%)。