Benzyl chloroformate → HCID 23560151, compound

Participants

Reaction Steps

To a solution of 3.0 g (9.64mmol) tert-butyl [2-(aminomethyl)phenyl]acetate in 100 mL methylene chloride cooled to 0° C. was added 0.825 ml (5.78 mmol) benzyl chloroformate followed by 1.47 g (12.05 mmol) of 4-dimethylaminopyridine and a second 0.825 ml (5.78 mmol) portion of benzyl chloroformate. After 30 min the reaction was washed with 10% potassium hydrogen sulfate (aq) (2×30 mL), water (1×30 mL), and brine (1×30 mL), dried over sodium sulfate, filtered and concentrated to dryness in vacuo. The resulting crude oil (3.69 g) was flash chromatographed on silica gel (15% ethyl acetate in hexane) to give tert-butyl [2-({[(benzyloxy)carbonyl]amino}methyl)phenyl]acetate as a colorless oil: 1H NMR (CDCl3, 400 MHz): δ7.38-7.30 (m, 5H), 7.28-7.21 (m, 4H), 5.40 (br s, 1H), 5.12 (s, 2H), 4.40 (d, 2H, J=5.5 Hz), 3.61 (s, 2H), 1.41 (s, 9H); MS (Electrospray): M+Na=378.1; TLC Rf=0.30 (15% ethyl acetate in hexane).

Provenance & Evidence