HCID 21392593, compound → HCID 178439276, compound

Participants

Reaction Steps

A solution of 2.96 parts of 5-[5-(3-methyl-n-butoxy)-8-n-propyl-4-oxo-4H-1-benzopyran-2-yl]-N-benzyltetrazole in 500 parts of ethanol was stirred at 60°C, with 0.096 parts of 5% palladium on charcoal, in an atmosphere of hydrogen for 111/2 hours. The reaction mixture was cooled, was filtered and the solvent removed by evaporation to give a residue which was chromatographed on silica gel. Careful elution with chloroform and chloroform/acetone gave 0.16 parts of 5-[5-(3-methyl-n-butoxy)-8-n-propyl-4-oxo-4H-1-benzopyran-2-yl]tetrazole, m.p. 199°-200°C (after recrystallisation from ethanol).

Provenance & Evidence