反应详情

To 288 mg (0.7 mmol) of 4-(3-benzylamino-2-cyano-6-fluoro-phenyl)-piperazine-1-carboxylic acid tert-butyl ester dissolved in 7 mL tetrahydrofuran was added 1.4 mL (2 eq., 1.4 mmol, 1M in tetrahydrofuran)borane. The mixture was refluxed 10 hours and quenched with methanol, partitioned between ethyl acetate and water, dried over magnesium sulfate and concentrated to yield crude 4-(2-aminomethyl-3-benzylamino-6-fluoro-phenyl)-piperazine-1-carboxylic acid tert-butyl ester, which was used directly in the following step.

1. temperatureThe mixture was refluxed 10 hours
2. customquenched with methanol
3. custompartitioned between ethyl acetate and water
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated