TRIPHENYLCARBENIUM AND TRIS(P-BROMOPHENYL)AMMONIUMYL ION INDUCED LACTONIZATIONS OF ω-BENZYLOXY AND ω-P-METHOXYBENZYLOXY METHYL ESTERS

Article abstract of DOI:10.1016/0040-4039(81)80004-4

The title reaction leads to smooth generation of five and six membered lactones via direct nucleophilic participation of the carbomethoxy group in intermediates of type 3.