作者:Gerald Haaima、Mary-Jeanne Lynch、Anne Routledge、Rex T. Weavers
DOI:10.1016/s0040-4020(01)85740-9
日期:1993.1
Alkenes are readily 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.
Iodovinylidene lactone synthesis. Free radical cyclisation of iodoacetylenic esters
作者:Gerald Haaima、Rex T. Weavers
DOI:10.1016/0040-4039(88)85342-5
日期:1988.1
Propiolic acids add to alkenes in the presence of N-iodosuccinimide to give iodo acetylenic esters. These, on treatment with dibenzoyl peroxide, undergo cyclisation to yield (E)-iodovinylidene butyrolactones. Subsequent alkylation with lithium dimethylcuprate occurs by replacement of the iodine.