95241-43-3

Upstream product

• 18741-24-7 3-phenyl-2-thioxo-2,3-dihydro-1H-quinazolin-4-one 
• 29745-27-5 3-phenyl-2-ethylsulfanyl-2,3-dihydroquinazolin-4(1H)-one 
• 106584-45-6 2-anilino-3-aminoquinazoline-4(3H)-hydrazone 
• 622403-42-3 1-phenyl-3-(2-ethoxycarbonylphenyl) carbodiimide 
• 179039-70-4 ethyl 2-(triphenylphosphoranylidene-amino)benzoate 
• 31793-58-5 2-(benzylthio)-3-phenylquinazoline-4(3H)-thione 
• 731-52-2 2-hydrazino-3-phenyl-3H-quinazolin-4-one 

Downstream Products

• 19062-39-6 3-amino-2-hydrazinoquinazolin-4(3H)-one 
• 4248-15-1 2-anilinoquinazolin-4(3H)-one 

Relevant academic research and scientific papers

New efficient synthesis of 1,2,4-triazolo[5,1-b]quinazolin-9(3h)-ones via a tandem aza-Wittig/heterocumulene-mediated annulation

The carbodiimides 2, obtained from aza-Wittig reactions of iminophosphorane 1 with aromatic isocyanates, react with hydrazine to give, selectively, the 3-amino-2-arylaminoquinazolin-4(3H)-ones 4. Reaction of 4 with triphenylphosphane, hexachloroethane and

Chemistry of Quinazolines: Reinvestigation of the Action of Hydrazine on Thioxo Derivatives

The action of hydrazine on 2-mercapto and 2-alkylmercaptoquinazolin-4-ones is reinvestigated.The structure of the isolated products have been revised.