[Reactions of 4-oxo-4H-pyrido(3',2':4,5)thieno(3,2-d)-1,3-oxazines with amines].

: The reaction of the title compounds with amines gave in dependence of the reaction conditions and the structure of the title compounds and the amine 3-acylamino-thieno[2,3-b]pyridine-2-carbonamides (B), 4-oxo-4 H-pyrido[3',2':4,5]thieno[3,2-d]pyrimidines (D),N-(2-carboxy-thieno[2,3-b]pyridine-3-yl)amidines (C) and N-(thieno[2,3-b]pyridin-3-yl)amidines (E). Substances of structure C and E seem to be of biological interest, especially for their antianaphylactic reactions.