Hydroxyamine hydrochloride → HCID 58997139, compound

Participants

Reaction Steps

To a mixture of Na metal (1—mg, 4.91 mmol) in MeOH (5 mL) was added NH2OH—HCl (204 mg, 2.94 mmol) followed by a solution of 5-[Bis-(3-methyl-pyridin-2-ylmethyl)-amino]-pentanoic acid methyl ester (126 mg, 0.37 mmol) in MeOH (7 mL) and the reaction stirred 1.5 h. An additional amount of Na (134 mg, 5.83 mmol) and NH2OH—HCl (208 mg, 2.99 mmol) was then added and the mixture stirred another 40 min then quenched with water (2-3 mL). The mixture was concentrated and diluted with H2O (10 mL), saturated aqueous NaHCO3 (to pH 10) and CHCl3 (25 mL) and stirred vigorously overnight. The layers were separated and the aqueous was extracted with CHCl3 (2×15 mL). The combined organic extracts were dried (Na2SO4), concentrated and purified by radial chromatography on silica gel (1 mm plate, CH2Cl2/MeOH/NH4OH, 50:1:1 then 25:1:1 then 10:1:1) to give COMPOUND 172 (47 mg, 37%) as a white solid: 1H NMR (CDCl3) δ 1.54-1.58 (m, 4H), 2.11 (s, 6H), 2.12-2.15 (m, 2H), 2.52-2.55 (m, 2H), 3.71 (s, 4H), 7.12 (dd, 2H, J=9, 6 Hz), 7.42 (d, 2H, J=9 Hz), 8.36 (d, 2H, J=6 Hz). 13C NMR (CDCl3) δ 17.91, 21.92, 23.16, 31.68, 52.73, 57.23, 122.58, 133.61, 138.43, 145.52, 156.61, 170.55. ES-MS m/z 343 (M+H). Anal. Calcd. for C19H26N4O2.1.3CH3OH: C, 63.48; H, 8.19; N, 14.59. Found: C, 63.66; H, 8.03; N, 14.33.

Provenance & Evidence