Dispiroketals in Synthesis (Part 20)1: Preparation of Chiral 2,2’-Bis(halomethyl) and 2,2’-Bis(phenylthiomethyl)dihydropyrans

Abstract
The preparation of 2,2’-bis(bromomethyl), 2,2’-bis(iodomethyl) and 2,2’-bis(phenylthiomethyl)dihydropyrans is described for potential use as selective protecting agents for 1,2-diols as their corresponding dispiroketals.

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