Cyclization of thiohydrazonate esters and azo-hydrazone tautomerism of 2-arylhydrazono-3-oxo-1,4-benzothiazines
Reaction of ethyl arylhydrazonochloroacetates (1) with 2-aminothiophenol (2) in ethanol in the presence of triethylamine yielded the respective ethyl thiohydrazonate esters (3). Similarly, methyl arylhydrazonochloroacetates (6) gave the corresponding meth
Shawali, Ahmad S.,Elsheikh, Said,Parkanyi, Cyril
p. 207 - 212
(2007/10/03)
1,4-Benzothiazine Derivatives from 2-Aminobenzenethiol and Hydrazonoyl Halides
2-Aminobenzenethiol was condensed with alkyl α-chlorophenylhydrazonoglyoxylates yielding alkyl 2-(2-aminophenylthio)-2-arylhydrazonoglyoxylates which were cyclized to the corresponding 2-arylhydrazono-2,3-dihydro-4H-1,4-benzothiazin-3-ones.Starting from α
Almirante, Nicoletta,Forti, Luciana
p. 1523 - 1524
(2007/10/02)
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