Hydroxylamine → HCID 58487987, compound

Participants

Reaction Steps

To a solution of (5S)-5-((1R)-4-(4-ethoxyphenyl)-1-{[4-(4-fluorophenyl)-1-piperazinyl]carbonyl}butyl)-2,2-dimethyl-1,3-dioxolan-4-one (120 mg; 0.24 mmol; 1.0 eq.) in iPrOH (1 mL) was added an aq. solution of hydroxylamine (50%, 71 μl; 1.2 mmol; 5.0 eq.) and the reaction mixture was stirred for 45 min. CH3CN (4 mL) was then added and the resulting mixture was purified by chromatography by reverse-phase preparative HPLC (gradient from 25% to 45% of CH3CN containing 0.1% TFA, in water containing 0.1% TFA). The collected fractions were lyophilized to give the title compound (19) as a white solid (75 mg, 66%). 1H NMR (CDCl3, 300 MHz) δ 7.1-6.99 (m, 6H), 6.80 (d, J=8.2 Hz, 2H), 4.26 (m, 1H), 4.06 (m, 1H), 3.96 (t, 2H, J=6.8 Hz), 3.80 (m, 1H), 3.63 (m, 2H), 3.40 (m, 1H), 3.23-3.00 (m, 4H), 2.58 (m, 2H), 1.85-1.52 (m, 4H), 1.38 (t, J=6.9 Hz, 3H). M−(ESI): 472.1; M+(ESI): 474.6. HPLC: Rt: 3.2 min (HPLC purity: 93.7%).

Provenance & Evidence