Methanol → HCID 178451783, compound

Participants

Reaction Conditions

Reaction Steps

Anhydrous hydrazine (0.040 mL, 41 mg, 1.27 mmol) was added to a stirred solution of 1-(tert-butoxycarbonyl)-α-(trifluoroacetyl)-4-piperidineacetic acid ethyl ester (275 mg, 0.75 mmol, from Step B) in toluene (2.0 mL) at RT. The mixture was warmed to 60° C. for 4 h, followed by 16 h at 80° C. The mixture was allowed to cool to RT, transferred to another flask with CH3OH, and evaporated to give the title compound as a white solid. For the title compound: 1H NMR (500 MHz, CD3OD) δ 4.15 (bd, J=13, 2H), 2.86–2.70 (m, 3H), 1.88 (bq, J=12, 2H), 1.62 (bd, J=13, 2H), 1.47 (s, 9H); ESI-MS 280.3 (M+H−56) and 236.3 (M+H−100); HPLC A: 3.0 min.

Provenance & Evidence