5-[8-allyl-5-(3-methyl-n-butoxy)-4-oxo-4H-1-benzopyran-2-yl]-N-benzyl tetrazole → HCID 21392593, compound

Participants

Reaction Steps

A solution of 5.34 parts of 5-[8-allyl-5-(3-methyl-n-butoxy)-4-oxo-4H-1-benzopyran-2-yl]-N-benzyltetrazole in 1000 parts of ethanol was hydrogenated at room temperature and pressure for 20 hours using 0.14 parts of 5% palladium on charcoal as catalyst. The reaction mixture was filtered and the solvent removed by evaporation. Crystallisation of the residue from chloroform/light petroleum (40:60) gave 1.89 parts of 5-[5-(3-methyl-n-butoxy)-8-n-propyl-4-oxo-4H-1-benzopyran-2-yl]-N-benzyltetrazole, m.p. 87°-87.5°C.

Provenance & Evidence