作者:Sreenivas Punna、Stéphane Meunier、M. G. Finn
DOI:10.1021/ol0489898
日期:2004.8.1
Aryl propargyl ethers and esters are cleaved selectively in the presence of aryl methyl ethers and esters by boron tribromide in dichloromethane. Under the same conditions, allyl ethers undergo very rapid Claisen rearrangement, and benzyl ethers are also cleaved more rapidly than propargyl. A mechanism involving intramolecular delivery of bromide to the propargyl terminus is proposed. [reaction: see
在芳基甲基醚和酯存在下,芳基炔丙基醚和酯被三溴化硼在二氯甲烷中选择性裂解。在相同条件下,烯丙基醚经历非常快的克莱森重排,并且苄基醚的裂解速度也比炔丙基更快。提出了一种涉及分子内将溴化物递送至炔丙基末端的机理。[反应:看文字]