91177-85-4

Upstream product

• 88243-65-6 (-)-(6R)-6-methyl-6,7,8,9-tetrahydro-4H-pyrido<1,2-a>pyrimidin-4-one 
• 100-34-5 benzene diazonium chloride 
• 91177-82-1 6(R)-methyl-9-<(dimethylamino)methylene>-3-formyl-6,7,8,9-tetrahydro-4H-pyrido<1,2-a>pyrimidin-4-one 

Downstream Products

• 91111-91-0 (E)-3-[(R)-6-Methyl-4-oxo-9-(phenyl-hydrazono)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl]-acrylic acid 
• 91111-90-9 (E)-3-[(R)-6-Methyl-4-oxo-9-(phenyl-hydrazono)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl]-acrylic acid ethyl ester 

Relevant academic research and scientific papers

Nitrogen Bridgehead Compounds. 44. New Antiallergic 4H-Pyridopyrimidin-4-ones. 4

The weak antiallergic activity of 6-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyridopyrimidine-3-carboxylic acid (1) in the rat reaginic passive cutaneous anaphylaxis test was enhanced by the introduction of an (arylamino)methylene moiety into position 9