Synthesis of γ-lactones from alkenes employing p-methoxybenzyl chloride as +CH2---CO−2 equivalent
The ZnCl2 catalyzed reaction of p-methoxybenzyl chloride with alkenes yields the 1:1 addition products 3, which are converted into the γ-lactones 4 via Ru(VIII) catalyzed oxidative degradation of the aromatic ring.