反应详情

温度

50 °C

To a suspension of MnO2 (10 eq) in dioxane is added 1-(4-hydroxymethyl-phenyl)-ethanone O-(2-trifluoromethyl-biphenyl-4-ylmethyl)-oxime (1 eq). The resulting mixture is refluxed for 10 minutes. After filtration and concentration, the residue is dissolved in MeOH and treated with β-alanine (2 eq) and Et3N (1.5 eq). The resulting mixture is heated at 50° C. for 30 minutes. After cooling to room temperature, NaBH4 (3 eq) is added in portions. Purification by preparative LCMS results in 3-{4-[1-(2-trifluoromethyl-biphenyl-4-ylmethoxyimino)-ethyl]-benzylamino}-propionic acid; 1H NMR (400 MHz, CD3OD) δ 2.28 (s, 3H), 2.75 (t, J=6.8 Hz, 2H), 3.26 (t, J=6.8 Hz, 2H), 4.22 (s, 2H), 5.30 (s, 2H), 7.26-7.77 (m, 12H). MS: (ES+): 471.1 (M+1)+.

1. temperatureThe resulting mixture is refluxed for 10 minutes
2. filtrationAfter filtration and concentration
3. dissolutionthe residue is dissolved in MeOH
4. temperatureAfter cooling to room temperature
5. customPurification by preparative LCMS
6. customresults in 3-{4-[1-(2-trifluoromethyl-biphenyl-4-ylmethoxyimino)-ethyl]-benzylamino}-propionic acid