A practical Ti-salen catalyst based on dimeric salen ligand for asymmetric addition of trimethylsilyl cyanide to aldehydes
作者:Chengwei Lv、Daqian Xu、Shoufeng Wang、Cheng-Xia Miao、Chungu Xia、Wei Sun
DOI:10.1016/j.catcom.2011.04.022
日期:2011.7
from L-tartaric acid was synthesized through linking two salen units with 1,6-dibromohexane. The corresponding Ti complex was proved to be an efficient catalyst for asymmetric addition of trimethylsilyl cyanide to aldehydes, providing the corresponding optically active trimethylsilyl ether of cyanohydrins with moderate to good enantiomeric excesses and excellent yields under relatively low catalyst
通过将两个salen单元与1,6-二溴己烷连接,合成了衍生自L-酒石酸的二聚salen配体。事实证明,相应的Ti络合物是将三甲基甲硅烷基氰化物不对称加成到醛中的有效催化剂,在相对较低的催化剂负载条件下,提供了相应的旋光性的氰醇三甲基甲硅烷基醚,具有中等至良好的对映体过量,且产率高。