S(Cl)([Cl:3])=O.O[CH2:6][N:7]1[C:11]([CH3:13])([CH3:12])[C:10](=[O:14])[NH:9][C:8]1=[O:15]>C(Cl)Cl>[Cl:3][CH2:6][N:7]1[C:11]([CH3:13])([CH3:12])[C:10](=[O:14])[NH:9][C:8]1=[O:15]0.69 ml Thionyl chloride was added to a solution of 500 mg 1-Hydroxymethyl-5,5-dimethyl-imidazolidine-2,4-dione in 5 ml DCM at 0° C. for 30 minutes, then left to stir at 25° C. for 16 hours. The mixture was evaporated to dryness and used crude in the synthesis of example 23.
Loading…