159679-95-5

Upstream product

• 4613-53-0 6-amino-2-phenyl-4H-1-benzopyran-4-one 
• 532-55-8 Benzoyl isothiocyanate 
• 98-88-4 benzoyl chloride 

Relevant academic research and scientific papers

Synthesis of N-(9-oxo-7-phenyl-9H-pyrano[2,3-g]benzothiazol-2-yl)benzamides from 6-aminoflavone

6-Aminoflavone (1) was treated with aroyl isothiocyanate in acetone at reflux temperature yields N-aroyl-N'-(2-phenyl-4-oxo-4H-[1]benzopyran-6-yl)thioureas. The products obtained on reaction of 2 with PCl5 in POCl3 medium leads to N-(9-oxo-7-phenyl-9H-pyrano[2,3-g]-benzothiazol-2-yl)benzamides (4). The structures of the compounds synthesized were established by analytical and spectral data.