Stereoselective synthesis of C3–C17 and C18–C34 subunits of bullatanocin utilizing α-chloro sulfide intermediates
作者:L. Raju Chowhan、Sadagopan Raghavan
DOI:10.1016/j.tetlet.2019.151132
日期:2019.10
A convergent synthesis of bullatanocin is envisaged by the union of C18–C34, C3–C17 and the butenolide subunits. The synthesis of the C3–C17 and C18–C34 subunits is disclosed that takes advantage of the chirality of tartaric acid for 1,2-asymmetric induction, chloro sulfides for carbon chain elongation and [2,3] sigmatropic shift for the preparation of 1,4-diol moiety via efficient 1,3-chirality transfer
通过C18–C34,C3–C17和丁烯内酯亚基的结合,可以实现布勒他霉素的收敛合成。公开了C3-C17和C18-C34亚基的合成,利用酒石酸的手性用于1,2-不对称诱导,氯硫化物用于碳链延伸,[2,3]σ位移用于制备1 1,4-二醇部分通过有效的1,3-手性转移。THF环通过分子内置换来修饰。