作者:Pramod Sawant、Martin E. Maier
DOI:10.1016/j.tet.2010.10.028
日期:2010.12
We describe a novel strategy to the atorvastatin lactone based on a Paal–Knorr synthesis of pyrrole 24 by condensing diketone 23 with primary amine 22. The latter contains the syn-1,3-diol subunit and a benzyl ether function at the other end of the chain. This allowed for manipulations on the pyrrole ring via iodination at C2, metalation with t-BuLi and carboxylation. The obtained acid 26 could be
我们通过将二酮23与伯胺22缩合,基于Paal-Knorr合成吡咯24来描述阿托伐他汀内酯的新策略。后者在链的另一端包含顺-1,3-二醇亚基和苄基醚官能团。这允许通过在C 2处碘化,用t- BuLi金属化和羧基化来对吡咯环进行操作。可以通过酰胺形成,脱苄基作用,氧化作用和内酯化作用将获得的酸26转化为阿托伐他汀内酯6。关键组成部分2-((4 R,6 S)-6-(2-(苄氧基)乙基)-2,2-二甲基-1,3-二恶烷-4-基)乙胺(根据Krische,通过两个连续的不对称转移氢化羰基烯丙基化获得22)。