Abstract

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.

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