74332-09-5Relevant articles and documents
Pyridopyrimidines. 11. Synthesis of 5-Deaza-5-oxoaminopterin and Related Compounds
Srinivasan, Ananthachari,Broom, Arthur D.
, p. 3746 - 3748 (1980)
The syntheses of 5-deaza-5-oxo analogues of aminopterin, methotrexate, and 10-thiaaminopterin are described.The sequence involves, as a key step, the preparation of 2,4-diamino-6-(hydroxymethyl)-5-oxopyridopyrimidine from readily accessible pyridopyrimidine derivatives.