Stereoselective synthesis of cis- or trans-2,4-disubstituted butyrolactones from Wynberg lactone
作者:Ashok Ganta、Julia L. Shamshina、Lauren R. Cafiero、Timothy S. Snowden
DOI:10.1016/j.tet.2012.04.107
日期:2012.7
(R)-Wynberg lactone was used to prepare various asymmetric 2,4-disubstituted butyrolactones in three to four steps. Attainment of any possible stereoisomer, based upon commencement from (R)- or (S)-4-trichloromethyl-2-oxetanone, and the capacity to install disparate substituents at C2 make this approach particularly versatile.
(R)-Wynberg内酯用于在三到四个步骤中制备各种不对称的2,4-二取代的丁内酯。基于从(R)-或(S)-4-三氯甲基-2-氧杂环丁酮的起始,获得任何可能的立体异构体,以及在C 2处安装不同取代基的能力,使得该方法特别通用。