Eu(fod)3-Catalyzed rearrangement of allylic esters possessing a chelating site. Application to enediyne synthesis
作者:Wei-Min Dai、Mavis Yuk Ha Lee
DOI:10.1016/s0040-4039(99)00276-2
日期:1999.3
A number of 1,2-dialkynyl-3-alkyl or 3-aryl allylic esters underwent a facile Eu(fod)3-catalyzed rearrangement at 20–132 °C to give exclusively cis-enediynes. The esters capable of forming a chelate with Eu(III) exhibited a remarkably enhanced reactivity; the C3 aryl group facilitated the rearrangement as well.
许多1,2-二炔基-3-烷基或3-芳基烯丙基酯在20–132°C下经历了容易的Eu(fod)3催化重排,仅产生顺式-二烯炔。能够与Eu(III)形成螯合物的酯显示出显着增强的反应性。C 3芳基也促进了重排。