Stereo- and chemoselective transfer hydrogenation of carbonyl groups with RuCl2(PPh3)3 and BINAP-Ru as catalysts and Et3NH+H2PO2−·1,5H2O as a hydrogen donor
作者:Bui The Khai、Antonio Arcelli
DOI:10.1016/0040-4039(96)01476-1
日期:1996.9
Using Et3NH+H2PO2−.1.5 H2O as a hydrogen donor, the RuCl2(Ph3P)3, and BINAP-Ru proved highly active catalysts for transfer hydrogenation of ketones under milder conditions than other hydrogen donors. 2-Methyl-, 2-chloro-, 2-(ethoxy-carbonyl)cyclohexanones and -cyclopentanones were reduced to the less stable axial alcohols in excellent diastereoisomeric excess (de: 90–100%), and the carbonyl group of α
使用的Et 3 NH + ħ 2 PO 2 - .1.5ħ 2 O作为氢供体,所述的RuCl 2(PH 3 P)3,和BINAP-孺证明了酮的转移氢化高活性催化剂比其他的氢供体较温和的条件下。2-甲基-,2-氯-,2-(乙氧基-羰基)环己酮和-环戊酮被还原为不稳定的轴向醇,且非对映异构体过量(de:90-100%),且α,β的羰基基团-不饱和酮被选择性还原,与其他氢供体相反,CC键被还原。