121564-91-8

Basic information

• Product Name: 1,3-Diphenyl-3a,9a-dihydro-1H-chromeno[2,3-c]pyrazole-4-thione
• Synonyms: 1,3-Diphenyl-3a,9a-dihydro-1H-chromeno[2,3-c]pyrazole-4-thione
• CAS NO: 121564-91-8
• Molecular Weight: 356.448
• Mol File: 121564-91-8.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 1,3-Diphenyl-3a,9a-dihydro-1H-chromeno[2,3-c]pyrazole-4-thione(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3-Diphenyl-3a,9a-dihydro-1H-chromeno[2,3-c]pyrazole-4-thione(121564-91-8)
• EPA Substance Registry System: 1,3-Diphenyl-3a,9a-dihydro-1H-chromeno[2,3-c]pyrazole-4-thione(121564-91-8)

Safety Data

• Hazardous Substances Data: 121564-91-8(Hazardous Substances Data)

Upstream product

• 491-38-3 1-benzopyran-4(4H)-one 
• 6005-15-8 thiochromone 
• 15424-14-3 N-phenylbenzohydrazonoyl chloride 

Relevant articles and documents

SOME NOVEL ASPECTS OF REGIOSELECTIVITY IN 1,3 DIPOLAR CYCLOADDITIONS OF 4H-1-BENZOPYRAN-4-THIONE

4H-1-Benzopyran-4-thione (1) reacted smoothly with nitrilimines (3a-e) to afford regioselective cycloadducts (4a-e) in good yields.In contrast,benzonitrile oxide (6) and aldonitrones (7a-d) reacted preferentially at the thione function.The unstable cycloadduct (8) or (9) ruptured to give as isolable products chromone (10) and phenyl isothiocyanate (11) and the thioamides (12a-d).This indirectly proves the site of attack of the dipole at the thione group.