SYNTHESIS OF PYRAZOLO[3,4-C][1,2]THIAZIN-4(3H)-ONE 2,2-DIOXIDES, NEW HETEROCYCLES

Authors
Citation
Ft. Coppo et Mm. Fawzi, SYNTHESIS OF PYRAZOLO[3,4-C][1,2]THIAZIN-4(3H)-ONE 2,2-DIOXIDES, NEW HETEROCYCLES, Journal of heterocyclic chemistry, 34(6), 1997, pp. 1693-1697
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry Inorganic & Nuclear
ISSN journal
0022-152X
Volume
34
Issue
6
Year of publication
1997
Pages
1693 - 1697
Database
ISI
SICI code
0022-152X(1997)34:6<1693:SOP2NH>2.0.ZU;2-M
Abstract
The reaction of substituted ethyl 5-aminopyrazole-4-carboxylates with two equivalents of methanesulfonyl chloride gave the substituted ethyl is(methylsufonyl)amino]-1H-pyrazole-4-carboxylates II. Removal of one of the methanesulfonyl groups, followed by alkylation of the ethyl [( methylsulfonyl)amino]-1H-pyrazole-4-carboxylates III with methyl iodid e produced the substituted ethyl l(methylsulfonyl)amino]-1H-pyrazole-4 -carboxylates IV. Treatment of IV with sodium hydride gave the 7-subst ituted ydro-1-methylpyrazolo[3,4-c][1,2]thiazin-4(3H)-one 2,2-dioxides V.