Olefin-Metathesis-Based Synthesis of Furans by an RCM/Deprotonation/Phosphorylation Sequence and Their Diels-Alder Reactions
作者:Bernd Schmidt、Diana Geißler
DOI:10.1002/ejoc.201101078
日期:2011.12
Butenolides, obtained by ring-closing metathesis (RCM) of acrylates, undergo quantitative deprotonation with amide bases. Trapping of the resulting anions with electrophiles, for example, chlorophosphates, give furans. Subsequent Diels–Alder reaction and acid-catalysed rearrangement of the resulting oxabicyclonorbornadienes give substituted benzenes.
通过丙烯酸酯的闭环复分解 (RCM) 获得的丁烯内酯与酰胺碱进行定量去质子化。用亲电试剂(例如氯磷酸盐)捕获所得阴离子,得到呋喃。随后的 Diels-Alder 反应和所得氧杂双环降冰片二烯的酸催化重排得到取代苯。