An Efficient Synthesis of Arylcyclobutenes via Cross-Coupling of Aryl Halides with 1-(Tri- n -butylstannyl)cyclobutene
作者:Jing Feng、Günter Szeimies
DOI:10.1016/s0040-4020(00)00350-1
日期:2000.6
1-Tri-n-butylstannylcyclobutene, obtained from 1-bromocyclobutene by lithium/bromine exchange and transmetalation with chloro-tri-n-butylstannane, could be effectively converted with aryl halides into 1-arylcyclobutenes by the Stille cross-coupling procedure. Hetero-aryl halides like 2-bromopyridine and 2-iodothiophene were also successfully coupled, and in 1,3,5-tribromobenzene, 1,2,4,5-tetrabromobenzene and hexabromobenzene all bromine atoms could be exchanged. (C) 2000 Elsevier Science Ltd. All rights reserved.