Nonaqueous diazotization of 5??amino??1??aryl??1H??pyrazole??4??carboxylate esters

…, RP Gajewski, MP Lynch, FL Wright

文献索引：Beck, James R.; Gajewski, Robert P.; Lynch, Michael P.; Wright, Fred L. Journal of Heterocyclic Chemistry, 1987 , vol. 24, p. 267 - 270

全文：HTML全文

被引用次数: 29

摘要

Abstract 5-Amino-1-aryl-1H-pyrazole-4-carboxylate esters are converted to the corresponding desamino, chloro, bromo, iodo, and methylthio esters by processes involving nonaqueous diazotization. Diazotizing agents are alkyl nitrites except in the case of chlorine where nitrosyl chloride is used. Evidence is presented that the latter reagent leads to the formation of cationic rather than radical intermediates.