76244-64-9

Upstream product

• 16063-05-1 2-(4-nitrophenyl)-4H-3,1-benzoxazin-4-one 
• 95-54-5 1,2-diamino-benzene 
• 122-04-3 4-nitro-benzoyl chloride 
• 118-92-3 anthranilic acid 

Downstream Products

• 65847-33-8 6-(4-nitro-phenyl)-benzo[4,5]imidazo[1,2-c]quinazoline 

Relevant academic research and scientific papers

Synthesis of benzimidazo[1,2-c]quinazolines as possible bronchodilators

Synthesis of some 6-aryl-benzimidazo[1,2-c]quinazolines 4 have been critically investigated. The first method, based on the condensation of substituted-1,3-benzoxazin-4-(3H)-one 2 with o-phenylenediamine followed by cyclization of the resulting 2-aryl-3-(

Synthesis of Some New 2-Aryl-3-Hetaryl-4(3H) Quinazolones

2-Aryl (alkyl)-benzoxazin-4-ones (I, R = CH3, C6H5, C6H5CH2, p-NO2C6H4) are condensed with 2-amino hetaryls (pyridyl, pyrimidyl, thiazolyl), 1 and 2-amino anthraquinones, p-amino acetophenone and 1,2-diamines like ethylene diamine and o-phenylene diamine.The products are obtained in excellent yields and are characterised by infrared and elemental analysis.