Nitrogen → HCID 20516515, compound

Participants

Reaction Steps

A mixture of α-[(2-carboxy-4-ethylphenyl)thio]-γ-butyrolactone (1.0 g) in acetic anhydride (30 ml) and triethylamine (6 ml) was heated at 130° C. for 30 minutes under a stream of N2 gas with stirring. The mixture was evaporated in vacuo. The resulting residue was submitted to column chromatography on silica gel (20 g) and charcoal (5 g) eluting with CHCl3 to give 5-ethyl-4',5'-dihydrospiro[benzo[b]thiophene-2(3H),3'(2'H)-furan]-3,2'-dione as colorless oil. Anal. Calcd. for C13H12O3S: C, 62.88; H, 4.87. Found: C, 62.83; H, 4.83.

Provenance & Evidence