AN EFFICIENT PROCEDURE FOR THE SYNTHESIS OF PYRAZOLO[3,4-D][1,3]THIAZIN-4-ONES

被引：0

作者：

VICENTINI, CB ^{[1
]}

VERONESE, AC ^{[1
]}

GUCCIONE, S ^{[1
]}

GUARNERI, M ^{[1
]}

MANFRINI, M ^{[1
]}

GIORI, P ^{[1
]}

机构：

[1] UNIV CATANIA,IST CHIM FARMACEUT & TOSSICOL,I-95125 CATANIA,ITALY

来源：

HETEROCYCLES | 1993年 / 36卷 / 10期

关键词：

D O I：

暂无

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Trichloromethyl chloroformate reacts with N-(1-alkyl/aryl-5-pyrazolyl) thiocarboxamides (2a-j) to give pyrazolo[3,4-d][1,3]thiazin-4-ones (3) while it reacts with N-(3-methyl-5-pyrazolyl)thiobenzamide (2m) to give the pyrazolo[1,5-c] [1,3,5]thiadiazine-4-one (4). Heating under reflux in formic acid of homologues (3g-i) bearing a tert-butyl group linked to pyrazole N-1 atom afforded the dealkylated derivatives (3k-m).

引用

页码：2291 / 2301

页数：11

共 18 条

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[8]

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