Asymmetric hydrogenation of methyl pyruvate in the continuous gas phase using Supported Ionic Liquid Phase (SILP) catalysis
作者:Martin Johannes Schneider、Marco Haumann、Peter Wasserscheid
DOI:10.1016/j.molcata.2013.04.022
日期:2013.9
Based on the recently reported asymmetric hydrogenation of methyl acetoacetate in a continuous-flow, gas phase reaction using Supported Ionic Liquid Phase (SILP) catalysis, this study deals with the even more challenging asymmetric reduction of the α-keto ester methyl pyruvate. Different support materials, ligands and ionic liquids were screened to identify an optimized Ru-based SILP catalyst. With
基于最近报道的使用支持性离子液体(SILP)催化的连续流动气相反应中乙酰乙酸甲酯的不对称氢化反应,本研究研究了更具挑战性的α-酮酸酯丙酮酸甲酯的不对称还原。筛选了不同的载体材料,配体和离子液体,以鉴定优化的Ru基SILP催化剂。将Ru-BINAP溶解在二氧化硅100上的离子液体3-羟丙基吡啶鎓双(三氟甲基磺酰基)酰亚胺中,可以在运行50小时以上获得稳定的催化剂性能。在95°C且在反应器中的停留时间少于3 s时,稳定的产物收率为80–84%,对映体的中度但稳定超过26–30%。