New radical reactions of S-alkoxycarbonyl xanthates. Total synthesis of (±)-cinnamolide and (±)-methylenolactocin
作者:Judith E Forbes、Radomir N Saicic、Samir Z Zard
DOI:10.1016/s0040-4020(98)01184-3
日期:1999.3
with visible light of S-alkoxycarbonyl xanthates derived from various alcohols gives rise to alkoxycarbonyl radicals with bifurcate reactivity: loss of carbon dioxide leads to deoxygenated derivatives (i.e. alkyl xanthates) whereas intramolecular addition to a suitably located double bond produces lactones; these new reactions were applied to the total synthesis of (±)-cinnamolide and (±)-methylenolactocin
用可见光照射衍生自各种醇的S-烷氧羰基黄药生成具有分叉反应性的烷氧羰基基团:二氧化碳的损失导致脱氧衍生物(即烷基黄药),而分子内加成至适当位置的双键则产生内酯;这些新的反应被应用于(±)-肉桂酸酯和(±)-甲基烯醇内酯的全合成。