HCID 13672820, compound → HCID 13672818, compound

Participants

Reaction Steps

6H-dibenzo[b,d]thiopyran-6-carboxylic acid, methyl ester (4.1 g; 0.016 mol) was dissolved in N/5 methanolic KOH (50 ml) and the solution was heated at reflux for 4 hours. The solution was cooled and poured in diluted HCl and extracted with chloroform. The extracts were dried over Na2SO4 and concentrated. The residue was solidified in n.pentane to give 6H-dibenzo[b,d]thiopyran-6-carboxylic acid; (3 g; yield 77%); m.p. 156°-159° C.

Provenance & Evidence