已经开发了一种新型的1,7-二炔用水级联反应,用于合成呋喃[3,4- c ]喹啉-4(5 H)-具有高原子经济性和阶梯经济性的骨架。在铜盐作为促进剂的情况下,钯催化剂可实现转化,包括一个C–C键和两个C–O键的形成。此外,该反应显示出对官能团的良好耐受性和广泛的底物范围。值得注意的是,对照实验支持从水中引入新的氧原子。
Syntheses of furo[3,4-c]coumarins and related furyl coumarin derivatives via intramolecular Wittig reactions
作者:Yeong-Jiunn Jang、Siang-en Syu、Yu-Jhang Chen、Mei-Chun Yang、Wenwei Lin
DOI:10.1039/c1ob06571h
日期:——
A new and general strategy for highly functional furo[3,4-c]coumarins and related furyl coumarin derivatives has been developed, which is based on an extraordinarily facile intramolecular Wittig reaction, starting from α,β-unsaturated ketones, tributylphosphine, and acyl chlorides. The phosphorus ylides were proposed to be the key intermediates for constructing the crucial furan ring, leading to a
已经开发了一种新的,通用的功能性呋喃[3,4- c ]香豆素和相关呋喃香豆香豆素衍生物的新策略,该策略基于从α,β-不饱和酮开始的极其容易的分子内Wittig反应,三丁基膦和酰氯。有人提出磷化磷是构成关键呋喃环的关键中间体,一步就可以制得各种各样的呋喃香豆素。