1,3-Asymmetric Induction in Acyclic Systems by Practical Application of Dithioacetal Group
作者:Yutaka Honda、Eitaro Morita、Kimitaka Ohshiro、Gen-ichi Tsuchihashi
DOI:10.1246/cl.1988.21
日期:1988.1.5
2-Lithio-2-(1-methyl-2-alkenyl)-1,3-dithianes showed 1,3-syn-selectivity on addition to aldehydes. Moreover this selectivity could be increased up to 97 %de by using equilibration of potassium alkoxide of the adduct in the presence of a ligand.
2-硫代-2-(1-甲基-2-烯基)-1,3-二噻烷在与醛加成时显示出 1,3-syn 选择性。此外,在配体存在的情况下,通过平衡加合物的氧化钾,这种选择性可以提高到 97 %de。