85808-59-9

Upstream product

• 85808-53-3 9-[1-Dimethylamino-meth-(E)-ylidene]-6-methyl-4-oxo-2-phenyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde 
• 64194-18-9 6-methyl-2-phenyl-4H-pyrido<1,2-a>pyrimidin-4-one 
• 85808-43-1 6-Methyl-2-phenyl-6,7,8,9-tetrahydro-pyrido[1,2-a]pyrimidin-4-one 

Downstream Products

• 91111-98-7 ethyl 9-formyl-6-methyl-2-phenyl-4-oxo-1,6,7,8-tetrahydro-4H-pyrido<1,2-a>pyrimidine-3-acrylate 
• 91111-94-3 (E)-3-{6-Methyl-4-oxo-2-phenyl-9-[1-phenylamino-meth-(Z)-ylidene]-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl}-acrylic acid ethyl ester 
• 91111-95-4 (E)-3-{6-Methyl-4-oxo-2-phenyl-9-[1-phenylamino-meth-(Z)-ylidene]-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-3-yl}-acrylic acid 

Relevant academic research and scientific papers

Nitrogen Bridgehead Compounds. Part 30. Vilsmeier-Haack Formylation of 6,7,8,9-Tetrahydro-4H-pyridopyrimidin-4-ones

Depending on the substituents at C(3) and on the reaction conditions, Vilsmeier-Haack formylation (POCl3-DMF) of 6,7,8,9-tetrahydro-4H-pyridopyrimidin-4-ones (I) led to 9-(dimethylaminomethylene)- or 9-(ethoxymethylene)-6,7,8,9-tetrahydro-4H-pyrido