Cl[C:2]1([C:9]([O:11][CH3:12])=[O:10])[C:6](=[O:7])[C:5]([Cl:8])=[CH:4][S:3]1.[CH3:13][OH:14]>>[Cl:8][C:5]1[C:6]([OH:7])=[C:2]([C:9]([O:11][CH3:12])=[O:10])[S:3][C:4]=1[O:14][CH3:13]2,4-Dichloro-2-methoxycarbonylthiophene-3(2H)-one (10 mmol) was stirred in anhydrous methanol at room temperature for 4 hours and the precipitate filtered, m.p. 109°-111° C. (methanol).
Wird geladen…