1,2-Dichloroethane → HCID 178502728, compound

Participants

Reaction Steps

EDC (6.9 g, 36 mmol) was added in several portions to a stirring solution of cis-4-benzyloxycarbonylamino-cyclohexanecarboxylic acid (5.0 g, 18 mmol), DMAP (10 mg), HOBt (10 mg) and N,O-dimethylhydroxylamine hydrochloride (3.5 g, 36 mmol) in dichloromethane (100 mL). To this solution was added dropwise triethylamine (10 mL, 72.0 mmol), and the reaction mixture was allowed to stir at room temperature overnight. After completion of stirring, the reaction mixture was poured into water and the aqueous layer was extracted with ethyl acetate (3×). The combined organic phase was washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo to give benzyl cis-4-(methoxy(methyl)carbamoyl)cyclohexylcarbamate as a colorless oil (5.48 g, 17.1 mmol, 95%). 1H NMR (CDCl3, 300 MHz) δ 7.38-7.28 (m, 5H), 5.09 (bs, 2H), 5.02 (m, 1H), 3.92-3.82 (m, 1H), 3.69 (s, 3H), 3.17 (s, 3H), 2.81-2.68 (m, 1H), 1.91-1.78 (m, 2H), 1.74-1.6 (m, 6H).

Provenance & Evidence