Diazabutadienes in heterocyclic syntheses. Preparation of pyrimidin-6-ones by reaction of 4-dialkylamino-1,3-diaza-1,3-butadienes with 2-oxazolin-5-ones

Article abstract of DOI:10.1016/S0040-4020(01)81230-8

1-Aryl-4-dimethylamino-2-phenyl-1,3-diaza-1,3-butadienes (1 and 1-aryl-4-dimethylamino-2-methylthio-1,3-diaza-1,3-butadienes (7 reacted with 2-oxazolin-5-ones (2) to yield pyrimidin-6-ones (3) and (8) respectively as single diastereoisomers with reverse s