Mark J. Kurth

Triphenylcarbenium and tris(P-bromophenyl)ammoniumyl ion induced lactonizations of (ω-benzyloxy and ω-P-methoxybenzyloxy methyl esters

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.

Preparation of d,l-megaphone intermediates

Abstract Chemistry related to the preparation of compounds 2 and 3 , demonstrated intermediates in a synthesis of d,l-megaphone, is described.