Ether hydrochloride → 1-(4-Chlorobenzyl)pyrrolidin-3-amine dihydrochloride

Participants

Reaction Conditions

Reaction Steps

To a methanol solution (80 mL) of the 3-[(tert-butoxycarbonyl)amino]-1-(4-chlorobenzyl)pyrrolidine (6.38 g, 20.5 mmol), was added 1 M HCl-Et2O (100 mL). The resulting mixture was stirred at 25° C. for 15 hours. The solvent was removed under reduced pressure to provide a solid, which was purified by recrystallization (methanol/acetonitrile=1:2, 130 mL) to thereby afford 3-amino-1-(4-chlorobenzyl)pyrrolidine dihydrochloride (4.939 g, 85%) as a white powder. 1H NMR (d6-DMSO, 300 MHz) δ 3.15 (br, 1H), 3.3-3.75 (br-m, 4H), 3.9 (br, 1H), 4.05 (br, 1H), 4.44 (br, 1H), 4.54 (br, 1H), 7.5-7.7 (m, 4H), 8.45 (br, 1H), 8.60 (br, 1H); the purity was determined by RPLC/MS (>99%). ESI/MS m/e 211.0 (M++H, C11H16ClN2).

Provenance & Evidence