1,3-Benzenediamine, 5-chloro- → HCID 90051718, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-chloro-1,3-phenylenediamine (1.22 g), N-Boc-glycine (500 mg) and (1-cyano-2-ethoxy-2-oxoethylideneaminoxy)dimethylamino-morpholino-carbenium hexafluorophosphate (1.83 g) in N,N-dimethylformamide (5 mL), N-methylmorpholine (628 μL) was added at room temperature, and the mixture was stirred at 130° C. for 5 hours. The reaction mixture was cooled to room temperature, and then saturated aqueous sodium hydrogencarbonate and ethyl acetate were added to the mixture. The organic layer was separated, and the aqueous layer was extracted with ethyl acetate. The organic layer and the extract were combined, washed successively with water and saturated aqueous sodium chloride, and then dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by basic silica gel column chromatography (eluent, 70 to 40% hexane in ethyl acetate) to obtain tert-butyl (2-((3-amino-5-chlorophenyl)amino)-2-oxoethyl)carbamate (B10, 273 mg) as yellow solid.

Provenance & Evidence