Synthesis of macrocyclic ketoesters by an n + 1 strategy based on free-radical carbonylation
作者:Kiyoto Nagahara、Ilhyong Ryu、Hiroshi Yamazaki、Nobuaki Kambe、Komatsu Mitsuo、Noboru Sonoda、Akio Baba
DOI:10.1016/s0040-4020(97)01048-x
日期:1997.10
(or tin hydride) was achieved under free radical reaction conditions. The allyltin mediated reaction of 1 also proceeded successfully to furnish 2-allyl-substituted 4-oxolactones 3 in moderate to good yields. In this n + 1 type macrocyclization, high dilution conditions () are beneficial for both the intermolecular trapping of CO and the intramolecular acyl radical addition to the CC double bond.
在自由基反应条件下,由在末端具有丙烯酰氧基部分的烷基碘1,一氧化碳和TTMSS(或氢化锡)合成10-17元4-氧内酯2。1的烯丙基锡介导的反应也成功地进行,以中等至良好的产率提供了2-烯丙基取代的4-氧内酯3。在这种n +1型大环化反应中,高稀释条件()对CO的分子间捕集和对CC双键的分子内酰基加成均有利。