Facile and practical synthesis of a cannabinoid-1 antagonist via regio- and stereoselective ring-opening of an aziridinium ion
作者:Edwin B. Villhauer、Wen-Chung Shieh、Zhengming Du、Kevin Vargas、Lech Ciszewski、Yansong Lu、Michael Girgis、Melissa Lin、Mahavir Prashad
DOI:10.1016/j.tet.2009.09.054
日期:2009.11
stereoselective ring-opening of an aziridinium ion by an aniline nucleophile (3). A mechanistic study revealed the insight into rate amplification at a lower temperature for vicinal diamine 12 formation via a aziridinium ion 14. Although most intermediates are not isolable by crystallization due to their intrinsic physical properties (oil or foamy solid), the reported synthesis furnished pure 1 without any
手性,三取代咪唑啉酮(的可扩展的合成策略1),一种新型大麻素-1拮抗剂,从可商购的扁桃酸(起始5)进行说明。关键步骤涉及苯胺亲核试剂对氮丙啶鎓离子的区域和立体选择性开环(3)。一项机械研究揭示了在较低温度下通过叠氮鎓离子14形成邻位二胺12的速率放大的见识。尽管大多数中间体由于其固有的物理特性(油或泡沫状固体)而无法通过结晶分离,但所报道的合成提供了纯1在整个合成过程中无需任何色谱纯化。利用绿色化学原理,这种新颖的合成方法似乎对制造几千克量的光学纯活性药物成分非常有效。