...
首页> 外文期刊>Organic process research & development >Asymmetric Hydrogenation of 3,5-Bistrifluoromethyl Acetophenone in Pilot Scale with Industrially Viable Ru/Diphosphine-Benzimidazole Complexes
【24h】

Asymmetric Hydrogenation of 3,5-Bistrifluoromethyl Acetophenone in Pilot Scale with Industrially Viable Ru/Diphosphine-Benzimidazole Complexes

机译:工业上可行的Ru /二膦-苯并咪唑配合物在规模上对3,5-二氟甲基苯乙酮进行不对称加氢

获取原文
获取原文并翻译 | 示例
           

摘要

A novel efficient asymmetric hydrogenation (AH) process was developed for the preparation of (R)-1-(3,5-bis(trifluoromethyl)phenyl)ethanol (3), using a catalyst Ru/(4R,5R)-(+)-4,5-bis(diphenylphosphinomethyl)-2,2-dimethyl-1,3-dioxoane-(R,R-Diop)-2R-(α-methylme-thanamine)-4,7-dimethyl-1H-benzo[d]imidazole (R-D-Me-BIMAH) in toluene in the presence of potassium t-butoxide. Various hydrogenation parameters, such as ligand, solvent, and substrate-to-catalyst (S/C) ratio, were investigated. The hydrogenation was carried out for four times on a 5 kg scale at 30 atm and 25 °C with S/C of 20 000 with an enantiomeric excess of >89%.
机译:开发了一种新型高效不对称氢化(AH)工艺,使用催化剂Ru /(4R,5R)-(+)制备(R)-1-(3,5-双(三氟甲基)苯基)乙醇(3)。 )-4,5-双(二苯基膦甲基)-2,2-二甲基-1,3-二氧戊环-(R,R-Diop)-2R-(α-甲基甲胺)-4,7-二甲基-1H-苯并[d]咪唑(RD-Me-BIMAH)在叔丁醇钾存在下的甲苯中。研究了各种氢化参数,例如配体,溶剂和底物与催化剂(S / C)的比率。在30 atm和25°C下以5 kg的规模进行氢化四次,S / C为20 000,对映体过量> 89%。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号