2-Aminophenol → HCID 45086957, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred suspension of potassium (2R,3S)-3-phenyloxirane-2-carboxylate (64a) (4.040 g, 20.00 mmol) in dry THF (100 mL) under nitrogen cooled in an ice-water bath was added isobutyl chloroformate (2.730 g, 20.00 mmol) slowly via syringe. NMM (0.460 mg, 4.55 mmol) was added and the mixture stirred while gradually warming to 10° C. over 75 min. The mixture was cooled to 0° C. and 2-aminophenol was added, then the cooling bath was removed and the reaction stirred at ambient temperature for 24 h. The reaction was diluted with diethyl ether (100 mL) then filtered through diatomaceous earth to remove suspended solids. Rotary evaporation of the solution afforded a yellow solid that was triturated with diethyl ether and collected by filtration. The solid was rinsed on the filter with additional diethyl ether to afford pure title compound (3.920 g, 77%) as an off-white solid. 1H NMR (300 MHz, DMSO-d6) δ4.00 (d, 1H, J=1.8 Hz), 4.22 (d, 1H, J=1.8 Hz), 6.80 (m, 1H), 6.87-7.00 (m, 2H), 7.40 (s, 5H), 7.95 (d, 1H, J=7.9 Hz), 9.27 (s, 1H), 9.97 (s, 1H). 13C-DEPT NMR (75 MHz, DMSO-d6) δ57.7 (CH), 58.4 (CH), 115.5 (CH), 119.4 (CH), 121.6 (CH), 125.1 (CH), 125.8 (C), 126.5 (CH), 128.9 (CH), 129.1 (CH), 135.9 (C), 147.7 (C), 165.4 (C). MS APCI, m/z=256 (M+1). LC/MS: 2.12 min.

Provenance & Evidence