Asymmetric routes in the reaction of cyclic ketene ortho ester with aldehydes involving the use of chiral Lewis acid
作者:Chan-Mo Yu、Jae-Young Lee、Kwangwoo Chun、In-Kyung Choi、Suk-Ku Kang
DOI:10.1039/b107454g
日期:2001.12.19
Enantio- and diastereoselective synthesis of threo 2 and erythro 3 was accomplished by the conversion of 1 with aldehydes promoted by chiral borane 10; enantioselctivities range from 45–95% ee, while diastereoselectivities vary from 4.3–49∶1 with 8 different aldehydes.