Synthesis of the CETP Inhibitor Torcetrapib: The Resolution Route and Origin of Stereoselectivity in the Iminium Ion Cyclization
作者:David B. Damon、Robert W. Dugger、George Magnus-Aryitey、Roger B. Ruggeri、Ronald T. Wester、Meihua Tu、Yuriy Abramov
DOI:10.1021/op060014a
日期:2006.5.1
A practical, efficient synthesis of (−)-(2R,4S)-4-[(3,5-bis-trifluoromethyl-benzyl)methoxycarbonylamino]-2-ethyl-6-trifluoromethyl-3,4-dihydro-2H-quinoline-1-carboxylic acid ethyl ester (1), a cholesteryl ester transfer protein (CETP) inhibitor, is described. The key reaction in the synthesis, addition of an N-vinylcarbamate to an iminium ion rapidly followed by an iminium ion cyclization onto the
一种实用,有效的合成(-)-(2 R,4 S)-4-[(3,5-双-三氟甲基-苄基)甲氧基羰基氨基] -2-乙基-6-三氟甲基-3,4-二氢-2H描述了胆甾醇酯转移蛋白(CETP)抑制剂-喹啉-1-羧酸乙酯(1)。合成中的关键反应是将N-乙烯基氨基甲酸酯快速添加到亚胺离子上,然后将亚胺离子环化到芳基环上,从而建立了6个四氢喹啉环的两个取代基的顺式关系。使用高级量子化学计算探索了环化中高顺式立体选择性的起源。