3-Chloro-4-fluorophenyl isocyanate → N-(3-chloro-4-fluorophenyl)-4-[((3R)-1-{3-[4-(methylsulfonyl)phenyl]propyl}piperidin-3-yl)methyl]piperazine-1-carboxamide

Participants

Reaction Steps

To a solution of 1-[((3R)-1-{3-[4-(methylsulfonyl)phenyl]propyl}piperidin-3-yl)methyl]piperazine (215 mg, 0.57 mmol) in toluene (15 ml) was added 3-chloro-4-fluorophenyl isocyanate (107 mg, 0.62 mmol) and the solution stirred for 18 hours. A further portion of 3-chloro-4-fluorophenyl isocyanate (54.0 mg, 0.31 mmol) was added and stirred for 30 minutes. The reaction was evaporated to an oil and flash column chromatography (silica, CH2Cl2 to 10% MeOH/CH2Cl2) gave N-(3-chloro-4-fluorophenyl)-4-[((3R)-1-{3-[4-(methylsulfonyl)phenyl]propyl}piperidin-3-yl)methyl]piperazine-1-carboxamide as a white foam (155 mg, 50%).

Provenance & Evidence