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Synthesis 2006(9): 1433-1436
DOI: 10.1055/s-2006-926438
DOI: 10.1055/s-2006-926438
PAPER
© Georg Thieme Verlag Stuttgart · New York
Synthesis of Sulfones in the Pyrrolo[2,1-b]thiazole Series
Weitere Informationen
Received
7 November 2005
Publikationsdatum:
11. April 2006 (online)
Publikationsverlauf
Publikationsdatum:
11. April 2006 (online)

Abstract
(Arylsulfonyl)acetonitriles were shown to react with mercaptoacetic acid in refluxing pyridine yielding 2-[(arylsulfonyl)methylidene]thiazolidin-4-ones. The latter underwent alkylation with α-bromoketones in the presence of K2CO3 selectively at the nitrogen atom. Further formylation of the resulting phenacyl derivatives with excess DMF·POCl3 complex afforded 5-aroyl-7-arylsulfonyl-2-[(dimethylamino)methylidene]pyrrolo[2,1-b]thiazol-3(2H)-ones.
Key words
alkylations - nitriles - pyrrolo[2,1-b]thiazoles - sulfones - Vilsmeier complex
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