作者:Thomas F. Anderson、Julian G. Knight、Kirill Tchabanenko
DOI:10.1016/s0040-4039(02)02677-1
日期:2003.1
In a short sequence, 5-vinyloxazolidin-2-ones were converted into the 3,6-disubstituted 3,6-dihydropyridin-2-ones via Pd-catalysed carbonylation and enolate alkylation with high diastereoselectivity. Alkylation of 6-substituted N-methylpyridin-2-ones gives stereoselectively the 3,6-anti diastereoisomer with MeI, BuI and i-PrI. Alkylation of the corresponding N-BOC pyridinones gives the 3,6-syn diastereoisomer
在很短的时间内,通过Pd催化的羰基化反应和高非对映选择性烯醇化烷基化反应,将5-乙烯基恶唑烷丁-2-酮转化为3,6-二取代的3,6-二氢吡啶-2-酮。6-取代的烷基化Ñ甲基吡啶-2-酮立体选择性地给出了3,6-反用MeI,BUI和非对映体我-pri。相应的N -BOC吡啶酮的烷基化得到具有高选择性的3,6-顺式非对映异构体。