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ChemInform Abstract: Synthesis and Cyclization of 1-(N-Nitroamidino)thioureas to 2,4-Diaminothiazoles.

✍ Scribed by R. BINU; K. K. THOMAS; G. C. JENARDANAN; K. N. RAJASEKHARAN

Publisher: John Wiley and Sons
Year: 2010
Weight: 29 KB
Volume: 29
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199823132

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✦ Synopsis

Synthesis and Cyclization of 1-(N-Nitroamidino)thioureas to 2,4-Diaminothiazoles.

-Reaction of nitroguanidine (I) with isothiocyanates in the presence of powdered KOH provides 1-(N-nitroamidino)thioureas (III) which react with phenacyl bromides to give unexpectedly 2,4-diaminothiazoles (V) in high yield.

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