646063-47-0

Upstream product

• 491-37-2 2,3-dihydro-4H-1-benzopyran-4-one 
• 19310-60-2 p-chlorobenzylidene cyanoacetamide 
• 104-88-1 4-chlorobenzaldehyde 
• 61661-20-9 (E)-3-(4-chloro-benzylidene)-chroman-4-one 
• 114283-20-4 2-Amino-4-(4-chloro-phenyl)-4H,5H-pyrano[3,2-c]chromene-3-carbonitrile 

Relevant academic research and scientific papers

Synthesis of novel tricyclic heterocyclic compounds as potential anticancer agents using chromanone and thiochromanone as synthons

The arylmethylene of benzopyrane or benzothiopyrane 3,4 have been synthesized and condensed with hydrazine, guanidine and thiourea to yield pyrazole 5-8, aminopyrimidine 9,10 and thioxopyrimidine derivatives 11,12, respectively. Compounds 3 or 4 on treatment with malononitrile in the presence of ammonium acetate/acetic acid or in the presence of piperidine/ methanol to yield benzopyrano- and benzothiopyranopyridine 13,14 and benzopyrano- and benzothiopyrane 15,16, respectively. The oxirane of compound 3 is prepared and condensed with CS2 to yield the tricyclic system, thioxothienobenzopyrane 21. Ylidenemalononitrile for the ketone 1 and 2 are synthesized and condensed with aromatic aldehyde in presence of ammonium acetate/acetic acid to yield benzopyranopyridine and benzothiopyranopyridine derivatives 24,25, respectively, which are the isomer of compounds 13,14. Ylidenemalononitrile on condensation with phenylisothiocyanate yields benzo-pyrano- and benzothiopyranothioxopyridine 28,29, respectively.