95610-19-8

Upstream product

• 80776-92-7 6-Formyl-6,7,8,9-tetrahydro-11H-pyrido<2,1-b>quinazolin-11-one 
• 99-98-9 4-amino-N,N-dimethylaniline 
• 3731-16-6 3-carboethoxy-2-pyridone 
• 118-92-3 anthranilic acid 
• 2446-62-0 7,8,9-trihydropyrido[2,1-b]quinazolin-11(6H)-one 

Relevant academic research and scientific papers

Nitrogen Bridgehead Compounds. Part 45. Synthesis of 6-Arylhydrazono-6,7,8,9-tetrahydro-11H-pyridoquinazolin-11-ones

A series of 6-arylhydrazono-6,7,8,9-tetrahydro-11H-pyridoquinazolin-11-ones 3-37, convenient starting materials for indolopyridoquinazolines, were prepared by diazonium coupling between aryldiazonium chlorides and 6,7,8,9-tetrahydro- 2, 6-formyl-6,7,8,9-tetrahydro- 39, 6-(dimethylamino)methylene-6,7,8,9- 38 or 6-carboxyl-6,7,8,9-tetrahydro-11H-pyridoquinazolin-11-ones 43.The arylhydrazono derivatives were also prepared from 6-bromo- 45 or 6,6-dibromo-6,7,8,9-tetrahydro-11H-pyridoquinazolines 46 with arylhydrazines.The structures of the 6-arylhydrazonopyridoquinazolines were characterized by uv and 1H nmr spectroscopy.The 6-arylhydrazono derivatives show a solvent-dependent E-Z isomerism.