A novel ring transformation of oxazinones and azetidinones into pyrimidinones
摘要:
Azetidinones or oxazinones, being easily prepared from enamines and acyl isocyanates, were transformed into highly substituted 4(3H)-pyrimidinones upon treatment with ammonium acetate. This novel ring transformation was also accomplished through a one-pot reaction without isolation of the adduct.