A convenient and highly regio and stereoselective method for the synthesis of (E)-3-alkylidene isobenzofuran-1(3H)-ones (phthalides)
作者:Rupa Mukhopadhyay、Nitya G Kundu
DOI:10.1016/s0040-4020(01)00943-7
日期:2001.11
2-Iodobenzyl alcohol on treatment with acetyleniccarbinols in the presence of a palladium catalyst and copper(I) iodide as a co-catalyst afforded disubstituted alkynes. Jones oxidation of the disubstituted alkynes led to (E)-3-alkylidene isobenzofuran-1(3H)-ones in good yields in a highly regio and stereoselective manner. The E-isomers were obtained exclusively instead of the more stable Z-isomers