作者:Martin P. Green、Jeremy C. Prodger、Christopher J. Hayes
DOI:10.1016/s0040-4039(02)01459-4
日期:2002.9
An enantioselective formal synthesis of the proteasome inhibitor (+)-lactacystin has been achieved using an alkylidene carbene 1,5-CH insertion reaction as a key step. The key cyclisation precursor was synthesised in high diastereomeric excess using a combination of known procedures, with the two key asymmetric centres being introduced via a Sharpless asymmetric epoxidation reaction. KHMDS induced
使用亚烷基卡宾1,5-CH插入反应作为关键步骤,实现了蛋白酶体抑制剂(+)-lactacystin的对映选择性形式合成。关键环化前体是使用已知程序的组合以高非对映异构体过量合成的,其中两个关键不对称中心是通过Sharpless不对称环氧化反应引入的。KHMDS诱导的1,5-CH插入产生了3-吡咯啉产物,使用(1)TPAP / NMO将其氧化为相应的3-pyrolin-2-one;(2)NaClO 2;(3)NaBH 4。然后通过一些标准的官能团相互转化完成了正式的合成。