Hydrochloric Acid → 4-Isopropoxycarbonylamino-indan-5-carboxylic acid methyl ester

Participants

Reaction Steps

Add isopropyl chloroformate (2.22 mL, 2.22 mmol, 1.0 M in toluene) dropwise to a solution of 4-Amino-indan-5-carboxylic acid methyl ester (425 mg, 2.22 mmol) and pyridine (0.44 mL, 5.5 mmol) in dichloromethane (4.4 mL) at 0° C. under an atmosphere of nitrogen and stir at room temperature for 24 h. Add 1M HCl and separate the layers. Extract the aqueous layer with dichloromethane. Dry the organic layers over anhydrous sodium sulfate, filter, and remove the solvent under reduced pressure, to afford the title compound (576 mg, 93%): 1H NMR (MeOD) δ 1.37 (d, J=6.5 Hz, 6H), 2.16 (quintuplet, J=7.7 Hz, 2H), 2.97 (t, J=7.3 Hz, 2H), 3.05 (t, J=7.3 Hz, 2H), 3.94 (s, 3H), 4.97 (m, 1H), 7.22 (d, J=8.1 Hz, 1H), 7.80 (d, J=8.1 Hz, 1H). MS (ES+): 278 (M+H).

Provenance & Evidence