反应详情

To a solution of di-2-pyridyl thionocarbonate (DPT) (14.3 g) and 4-dimethylaminopyridine (0.1 g) in CH2Cl2 (500 mL) is added dropwise over 30 minutes a solution of 5-amino-1-tert-butoxycarbonyl-4-methylbenzimidazole (7.82 g) in CH2Cl2 (250 mL). The mixture is stirred for 15 minutes at room temperature then rotary evaporated. The residue is purified by flash chromatography on silica gel, eluting with 10% ethyl acetate/hexane to afford 1-tert-butoxycarbonyl-4-methyl-5-benzimidazolylisothiocyanate as a white solid.

1. customThe residue is purified by flash chromatography on silica gel
2. washeluting with 10% ethyl acetate/hexane