An efficient synthesis of sulfonylhydrazides and sulfonylsemicarbazides by utilizing alumina as a catalyst
Sulfonyl hydrazides and sulfonyl semicarbazides are readily prepared by the reacting of hydrazine derivatives with sulfonyl chlorides in the presence of basic alumina under solvent-free conditions. Reaction of a sulfonyl chloride with t-butylcarbazate, followed by hydrolysis provides the corresponding sulfonyl hydrazides in higher yield and shorter time than previously reported.
Gordon, Michael S.,Krause, Josef G.,Linneman-Mohr, Michelle A.,Parchue, Regis R.
p. 244 - 245
(2007/10/02)
Sulfonyl carbazates as blowing agents
Sulfonyl carbazates containing at least one group of: wherein the oxygen and the sulphur atoms attach to various organic groups are useful as high temperature blowing agents for gas-expandable polymers. Additionally, novel polyfunctional and secondary
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(2008/06/13)
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