Total synthesis of balanol, part 2. Completion of the synthesis and investigation of the structure and reactivity of two key heterocyclic intermediates
作者:David Tanner、Lars Tedenborg、Antonio Almario、Ingrid Pettersson、Ingeborg Csöregh、Nicholas M. Kelly、Pher G. Andersson、Thomas Högberg
DOI:10.1016/s0040-4020(97)00167-1
日期:1997.3
enantioselective total synthesis of the natural product (-)-balanol (1) is described. In addition to benzophenone fragment 8, key intermediates are chiral bicyclic aziridine 3 and the corresponding epoxide 4, both of which undergo highly regio- and stereoselective nucleophilic ring-opening reactions, allowing control of the two stereogenic centres of the target molecule. The structure and reactivity
描述了天然产物(-)-巴拉诺醇(1)的收敛对映选择性全合成。除二苯甲酮片段8外,关键的中间体是手性双环氮丙啶3和相应的环氧化物4,二者均进行高度区域和立体选择性的亲核开环反应,从而可以控制靶分子的两个立体中心。已经对3和4的结构和反应性进行了详细研究。