A New and Convenient Method for the Preparation of Cyclooctanone Containing Bis-Aldol Skeleton by Samarium(II) Iodide-mediated Intramolecular Aldol Cyclization of ω-Oxiranyl Keto Octanal
作者:Khanitha Pudhom、Hidehiro Arai、Keiko Yamane、Teruaki Mukaiyama
DOI:10.1246/cl.2002.82
日期:2002.1
A polyoxy eight-membered ring compound containing a bis-aldol skeleton, 2,6-dibenzyloxy-3-(t-butyldimethylsiloxy)-7-hydroxy-8-hydroxymethyl-5-(p-methoxybenzyloxy)-4,4-dimethylcyclooctanone 1, a key synthetic intermediate of 19-hydroxypaclitaxel, was prepared in high yield from 2,6-dibenzyloxy-5-(t-buthyldimethylsiloxy)-3-(p-methoxybenzyloxy)-4,4-dimethyl-8,9-oxiranyl-7-oxononanal 6 by the samarium(II)
含有双羟醛骨架的聚氧八元环化合物,2,6-二苄氧基-3-(t-丁基二甲基甲硅烷氧基)-7-羟基-8-羟甲基-5-(对甲氧基苄氧基)-4,4-二甲基环辛酮 1是 19-羟基紫杉醇的关键合成中间体,由 2,6-二苄氧基-5-(叔丁基二甲基甲硅烷氧基)-3-(对甲氧基苄氧基)-4,4-二甲基-8,9-环氧乙烷以高收率制备7-oxononanal 6 通过碘化钐(II)介导的分子内醛醇环化。