Imidazole → tert-butyl 2-(2-hydroxy-N-methylbenzamido)ethylcarbamate

Participants

Reaction Steps

To a mixture of tert-butyl 2-(methylamino)ethylcarbamate (0.348 g, 2 mmol), 2-hydroxybenzoyl chloride (0.276 g, 2 mmol) and imidazole (0.136 g, 2 mmol) in ethyl acetate (8 mL) at 0° C. was slowly added a solution of DCC (0.412 g, 2 mmol) in ethyl acetate (2 mL). The mixture was stirred (RT, 16 h), filtered and concentrated under reduced pressure. The crude material was purified by chromatography on silica gel, eluting with ethyl acetate/petroleum ether (20-50%) to afford tert-butyl 2-(2-hydroxy-N-methylbenzamido)ethylcarbamate (0.2 g, 34%) as a colorless oil. 1HNMR (CDCl3): δ7.5 (m, 2H, CH), 7.0 (d, 1H, CH), 6.8 (d, 1H, CH), 3.7 (m, 2H, CH2), 3.48 (m, 2H, CH2), 3.2 (m, 3H, CH3), 1.5 (s, 9H, CH3).

Provenance & Evidence