Hydrochloric Acid → ((1R,4S)-4-aminocyclopent-2-en-1-yl)methanol hydrochloride

Participants

Reaction Steps

(+)-(1S,4R)-tert-Butyl N-[4-(hydroxymethyl)-2-cyclopenten-1-yl]carbamate (part b of this example, 10.66 g, 50.0 mmol) was refluxed in absolute ethanol (25 mL) with concentrated hydrochloric acid (5.0 mL, 60 mequiv) for 2.5 hours. Evaporation of volatiles left title compound as white solid; mass spectrum (ES): 114 (M+1); 1H-NMR (DMSO-d6) δ: 7.9 (m, 3H), 6.03 and 5.75 (two m, 2H), 4.11 (m, 1H), 3.41 (d, J=5.4 Hz, 2H), 2.8 (m, 1H), 2.36 (m, 1H), 1.4 (m, 1H). This solid was used immediately in the following example.

Provenance & Evidence