Regioselective Lithium-Iodine Exchange-Initiated Cleavage of 2-Iodomethyl-1,3-dioxanes: A Complex-Induced Proximity Effect

摘要

Lithium-iodine exchange-initiated fragmentation of a series of 4-substituted 2-iodomethyl-1,3-dioxanes proceeds rapidly and regioselectively to afford enol ether alcohols by preferential cleavage of the less congested C(2)-O(1) bond. The results demonstrate that a complex-induced proximity effect (CIPE) is likely responsible for the selectivity of the cleavage.