Journal of heterocyclic chemistry

Synthesis of pyrazolo [3, 4??c][1, 2] thiazin??4 (3H)??one 2, 2??dioxides, new heterocycles

FT Coppo, MM Fawzi

Index: Coppo, Frank T.; Fawzi, Maged M. Journal of Heterocyclic Chemistry, 1997 , vol. 34, # 6 p. 1693 - 1697

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Citation Number: 4

Abstract

Abstract The reaction of substituted ethyl 5-aminopyrazole-4-carboxylates with two equivalents of methanesul-fonyl chloride gave the substituted ethyl 5-[bis (methylsufonyl) amino]-1H.-pyrazole-4-carboxylates II. Removal of one of the methanesulfonyl groups, followed by alkylation of the ethyl 5-[(methylsulfonyl) amino]-1H-pyrazole-4-carboxylates III with methyl iodide produced the substituted ethyl 5-[methyl (methylsulfonyl) amino]-1H- ...