反应详情

To a solution of 2-chloro-5-nitro-4-thiocyanato-pyrimidine (1.31 g, 6.05 mmol) in EtOH (10 mL) at 0° C. was added a solution of (3-aminomethyl-benzyl)-carbamic acid tert-butyl ester (1.43 g, 6.05 mmol) dropwise over 45 min. The reaction was allowed to stir at room temperature overnight and the resulting precipitate filtered and washed with EtOH. The crude material was purified by column chromatography (silica gel, 10:90 to 12:88 EtOAc/hexane) to afford {3-[(5-nitro-4-thiocyanato-pyrimidin-2-ylamino)-methyl]-benzyl}-carbamic acid tert-butyl ester (1.43 g, 56%) as a yellow solid.

1. filtrationthe resulting precipitate filtered
2. washwashed with EtOH
3. customThe crude material was purified by column chromatography (silica gel, 10:90 to 12:88 EtOAc/hexane)