70993-81-6

Upstream product

• 71222-62-3 9-(phenyl-amino)-6-methyl-4-oxo-6,7-dihydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid ethyl ester 
• 70943-70-3 9-bromo-6-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid 
• 7440-44-0 pyrographite 
• 77020-26-9 9,9-dibromo-6-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido<1,2-a>pyrimidine-3-carboxylic acid 
• 62-53-3 aniline 
• 71222-75-8 9-anilino-6-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid 
• 38326-49-7 ethyl 9-bromo-6-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido<1,2-a>pyrimidine-3-carboxylate 
• 70943-66-7 ethyl 9-hydroxy-6-methyl-4-oxo-6,7-dihydro-4H-pyrido<1,2-a>pyrimidine-3-carboxylate 

Relevant academic research and scientific papers

Process for the preparation of nitrogen-bridgehead condensed pyrimidine compounds, and pharmaceutical compositions containing them

A process is disclosed for the preparation of compounds of the formula (I) STR1 wherein R1 and R2 are each hydrogen or lower alkyl; R3 is carboxy, lower alkoxycarbonyl, carbamoyl, carbamoyl substituted by one or two lower

Nitrogen Bridgehead Compounds. 38. New Antiallergic 4H-Pyridopyrimidin-4-ones. 3

The weak antiallergic activity of 6-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyridopyrimidine-3-carboxylic acid (4) on the rat reaginic passive cutaneous anaphylaxis test was enhanced by the introduction of appropriate functional groups into position 9 o

Antiallergic nitrogen bridge-head compounds

Antiallergic and antiasthmatic compounds of the formula STR1 of which 9-phenylamino-6-methyl-4-oxo-6,7-dihydro-4H-pyrido(1,2-a)pyrimidine-3-carboxylic acid and optically active antipodes and salts thereof are examples.