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From: sri muru gan (ssrimurugan$##$rediffmail.com)
Date: Thu Dec 01 2005 - 13:44:46 EST

   Hello everybody, I am trying to prepare dimesylates from 1,2-diols derived from TADDOLS. Mesylation under normal condition using triethylamine and mesyl chloride unusually give me cyclic sulfates (verified by further oxidation to cyclic sulfates)instead of dimesylates in case of these diols. The mesyl chloride was dried and distilled. For other 1,2-diols, normal dimesylates were observed. Could anyone suggest the reason for such unusual formation of cyclic sulfites. The Scheme is given as attachment for reference. Thanks in advance. s.srimurugan



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