A facile metal-free one-flask synthesis of multi-substituted furans <i>via</i> a BF<sub>3</sub>·Et<sub>2</sub>O mediated formal [4 + 1] reaction of 3-chloro-3-phenyldiazirines and α,β-alkenyl ketones
作者:Zixin Zhang、Aimin Huang、Lin Ma、Jian-hua Xu、Min Zhang
DOI:10.1039/d2ra01472f
日期:——
A facile, efficient and metal free one-flask approach to diversely substituted furans from easily accessible 3-chloro-3-phenyldiazirines and α,β-alkenyl ketones is reported. This protocol integrates three steps of cyclopropanation, Cloke–Wilson rearrangement and elimination of HCl in one-flask to give products in moderate to good yields. It provides a metal and oxidant free approach to multi-substituted
报道了一种从容易获得的 3-氯-3-苯基二氮杂环丙烷和 α,β-烯基酮中获得多种取代呋喃的简便、高效且无金属的单瓶方法。该协议在一个烧瓶中集成了环丙烷化、Cloke-Wilson 重排和 HCl 消除三个步骤,以提供中等至良好产量的产品。它为多取代呋喃提供了一种无金属和氧化剂的方法,具有操作简单、反应条件温和、底物范围广等优点。