Syntheses of ketene thioselenoacetals and of γ-unsaturated Se-alkyl carboxylic thionoselenoesters
摘要:
The alkylation of Se-alkyl carboxylic thionoselenoesters enethiolates stereoselectively leads to ketene thioselenoacetals. When the alkylation is conducted with an allylic halide a thio-Claisen rearrangement is observed.
Reaction of carboxylic thionoesters with dimethylaluminium methylselenolate in diethyl ether gave the corresponding Se-methyl thionoselenolesters in 87–98% yield.