Journal of Heterocyclic Chemistry p. 885 - 893 (2003)
Update date:2022-08-04
Topics:
Deck
Papadopoulos
Smith
The triethylamine-catalyzed reactions of methyl N-(cyanothioformyl)anthranilate (1) with isocyanates result in cyclization involving the cyano group to form methyl 2-(4-imino-2-oxo-3-substituted-5-thioxoimidazolidin-1-yl)benzoates (4). Ring closure at the ester carbonyl to form 3-aryl-3,4-dihydro-4-oxoquinazoline-2-carbonitriles (8) is observed when the S-methyl derivative of 1 is allowed to react with aromatic amines.
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