Lawesson's reagent → HCID 58423803, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of 6-bromo-2-(2,3-difluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (212 mg, 0.52 mmol) and Lawesson's Reagent (201 mg, 0.52 mmol) in dry m-xylene (4.5 mL) was heated at 150° C. in a 10 mL CEM microwave test tube for 25 minutes. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(2,3-difluorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidine]-5′-one (163 mg, 74%). 1H-NMR (CDCl3): 2.33 (t, 3H), 2.54 (d, 1H), 5.36 (s, 1H), 6.17 (d, 1H), 6.91 (d, 1H), 7.17 (m, 3H), 7.30 (m, 2H), 7.46 (s, 1H).

Provenance & Evidence