反应详情

A solution of 5-[2,2,2-Trifluoro-1-hydroxy-1-(trifluoromethyl)ethyl)-4,5-dihydroisoxazole-3-carboxylic acid from example 8-2 (84 mg, 0.3 mmol), 2-aminoheptane (69 mg, 0.6 mmol), 4-methylmorpholine (121 mg, 1.2 mmol), and (benzotriazol-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate (BOP) (265 mg, 0.6 mmol) in DMF (0.5 ml) was stirred at r.t. for 17 h. The reaction mixture was diluted with EtOAc, washed with water, 1 M citric acid and brine, then dried over MgSO4. The solvent was removed under reduced pressure and the residue was purified by preparative TLC (EtOAc:Haxanes, 2:1) to afford the title compound as a clear oil (74 mg, 65%). 1H NMR δ 0.86 (t, 3H), 1.16 (d, 3H), 1.27-1.45 (m, 8H), 3.39 (dd, 1H), 3.65 (dd, 1H), 3.99 (m, 1H), 5.11 (t, 1H), 6.36 (d, 1H). ESIMS: m/z 377 (M−H).

1. washwashed with water, 1 M citric acid and brine
2. dry with materialdried over MgSO4
3. customThe solvent was removed under reduced pressure
4. customthe residue was purified by preparative TLC (EtOAc:Haxanes, 2:1)