Enantioselective Total Synthesis of (−)-Minovincine in Nine Chemical Steps: An Approach to Ketone Activation in Cascade Catalysis
作者:Brian N. Laforteza、Mark Pickworth、David W. C. MacMillan
DOI:10.1002/anie.201305171
日期:2013.10.18
Dressed to the nines: The first enantioselective total synthesis of (−)‐minovincine has been accomplished in nine chemical steps and 13 % overall yield. A novel, one‐step Diels–Alder/β‐elimination/conjugate addition organocascade sequence allowed rapid access to the central tetracyclic core in an asymmetric manner. Boc=tert‐butoxycarbonyl, LG=leaving group, PMB=para‐methoxybenzyl.
打扮的花枝招展:所述的对映选择性第一全合成( - ) - minovincine在九个化学步骤和13%的总收率而完成的。一种新颖的一步 Diels-Alder/β-消除/共轭加成有机级联序列允许以不对称的方式快速进入中央四环核心。Boc =叔丁氧基羰基,LG = 离去基团,PMB =对甲氧基苄基。