C(Cl)(=O)C(Cl)=O.CS(C)=O.[Cl:11][C:12]1[CH:19]=[C:18]([F:20])[C:17]([Cl:21])=[CH:16][C:13]=1[CH2:14][OH:15].C(N(CC)CC)C>C(Cl)Cl>[Cl:11][C:12]1[CH:19]=[C:18]([F:20])[C:17]([Cl:21])=[CH:16][C:13]=1[CH:14]=[O:15]To a solution of oxalyl chloride (1.72 mL, 19.74 mmol) in 20 mL methylene chloride at -78° C. was added a solution DMSO (2.8 mL, 39.5 mL) in 3 mL methylene chloride. The mixture was stirred for 5 minutes at -78° C. followed by the addition of a solution of Part A 2,5-dichloro-4-fluorobenzyl alcohol (3.5 g, 17.95 mmol) from above in 15 mL methylene chloride. The mixture was stirred at -40° C. for 15 min., cooled to -78° C. followed by the addition of triethylamine (8.26 mL, 59.2 mmol). The mixture was allowed to come to RT, washed sequentially with 10% HCl, saturated sodium bicarbonate solution and water. The organic layer was dried over magnesium sulfate and concentrated to afford the title compound 3.39 g as a white solid. ##STR266##
Loading…
