Methyl 2-(substituted benzoylthio)benzoates undergo intramolecular ring cyclizations in the presence of Zn/TiCl 4 /LiAlH 4 to give the corresponding 2-aryl- or alkylsubstituted benzo-thiophenes in good yields.
A convenient alternative method for the synthesis of dithienylacetylenes
作者:Andrey G. Lvov、Nikita A. Milevsky、Valerii Z. Shirinian、Mikhail M. Krayushkin
DOI:10.1007/s10593-015-1800-8
日期:2015.10
A two-stage preparative method is proposed for the synthesis of dithienylacetylenes – widely used intermediates in the preparation of photochromic diarylethenes.