The carbonylative cyclization of 1,1-diethynyl acetates mediated by Phbox/Pd(TFA)2 afforded a functionalized 4-cyclopentene-1,3-dione as a major product. In the absence of box ligand, a methoxycarbonylated orthoester was obtained predominantly.
在 Phbox/Pd(TFA)2 的介导下,1,1-二炔基
乙酸酯发生羰基化环化反应,主要产物为官能化的
4-环戊烯-1,3-二酮。在没有盒
配体的情况下,主要得到甲氧基羰基化的原酯。