A Novel Entry to Spirofurooxindoles Involving Tandem Dearomatization of Furan Ring and Intramolecular Friedel- Crafts Reaction
作者:Biao-Lin Yin、Jin-Qiang Lai、Ze-Ren Zhang、Huan-Feng Jiang
DOI:10.1002/adsc.201100034
日期:2011.8
A copper sulfate pentahydrate-catalyzed intramolecular Friedel–Crafts reaction using an oxocarbenium species derived from a furan ring as the alkylating agent was developed for the first time. By using this protocol, spirofurooxindoles 9 with multi-reactive sites were synthesized simply and concisely. In addition, selective hydrogenation of the endo-cyclic double bond and full hydrogenation of the
首次开发了使用五水合硫酸铜催化的分子内Friedel-Crafts反应,该反应使用衍生自呋喃环的氧碳鎓类作为烷基化剂。通过使用该协议,具有多个反应位点的螺呋喃氧吲哚9可以简单,简明地合成。此外,选择性加氢内切-环状双键和全氢化内切和外切spirofurooxindoles的-环双键9提供spirofurooxindoles 11和12,分别。