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Phosphorus Pentoxide in Organic Synthesis, III. - A New Synthesis of Pyrido-pyrimidin-4(3H)-ones
Andresen, Ole R.,Pedersen, Erik B.
, p. 1012 - 1015 (2007/10/02)
Ethyl 2-acylamino-3-pyridinecarboxylates 1 were reacted with primary amine hydrochlorides, P2O5 and DMCA (N,N-dimethylcyclohexylamine) to yield a series of pyridopyrimidine-4(3H)-ones 2.The compounds 1 were prepared by acylating the corresponding e
