477800-75-2

Upstream product

• 100-52-7 benzaldehyde 
• 477800-65-0 3-amino-2-(4-methoxy-phenyl)-3H-pyrido[2,3-h]quinazolin-4-one 
• 433223-81-5 6-(4-methoxy-phenyl)-7-oxa-1,5-diaza-phenanthren-8-one 

Relevant academic research and scientific papers

Synthesis of 2-substituted-4H-pyrido[2,3-h]benzoxazin-4-ones and 2-substituted pyrido[2,3-h]-quinazolin-4(3H)ones

The reaction of 2-substituted-4H-pyrido[2,3-h]benzoxazin-4-ones (1) with hydrazine hydrate resulted in 2-substituted-3-aminopyrido[2,3-h]quinazolin-4(3H)ones (2) and not in the corresponding 3. The Schiff bases (4) of 2 on pyrolysis led to 2-substituted pyrido[2,3-h]quinazolin-4(3H)ones (5).