Synthesis of iodoalkylidene lactones from alkenes

Article abstract of DOI:10.1016/S0040-4020(01)85740-9

Alkenes are reality transformed into iodo acetylenic esters by addition of acetylenic acids in the presence of a source of iodonium ion. A subsequent free-radical cyclisation induced by dibenzoyl peroxide leads to (E)-iodoalkylidene butyrolactones.