A Simple Approach to the Synthesis of the Chiral Substituted Chroman Ring of Calophyllum Coumarins
作者:Prashant P. Deshpande、David C. Baker
DOI:10.1055/s-1995-3987
日期:1995.6
A stereoselective synthesis of the chiral 2,3-dimethylchroman-4-ol ring of the calophyllum coumarins is described. The chiral centers at C-3 and C-4 (chroman numbering) were introduced using (Z)-crotyldiisopinocampheylborane, and the chiral center at C-2 was introduced via mercury-assisted cyclization and demercuration, giving the required trans, trans-Me-Me-OH substituted chroman (benzo[b]pyran) ring.
本文描述了卡洛菲姆香豆素的手性2,3-二甲基色满-4-醇环的立体选择性合成。使用(Z)-克罗替二异松蒎基硼烷引入C-3和C-4(色满编号)的手性中心,通过汞辅助环化和脱汞引入C-2的手性中心,得到所需的反式,反式-Me-Me-OH取代色满(苯并[b]吡喃)环。