反应详情

To a solution of 2-Amino-1-(3-trifluoromethyl-phenyl)-ethanone hydrochloride (3.4 g, 0.0144 mol (prepared according to the procedure of Leclerc and Bizec (1980) J. Med. Chem. 23:783–744) and 4-(Benzyloxycarbonylamino-methyl)-cyclohexanecarboxylic acid (4.2 g, 0.0144 mol; for a preparation of this reagent see e.g., Svahn et. al. (1986) J. Med. Chem. 29:448–453) in DMF, Benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (BOP reagent, 6.4 g, 0.0144 mol) was added, followed by triethylamine (4.0 mL, 0.0289 mol). The reaction was stirred overnight and then poured into water to produce a thick precipitate. The solid was collected on a sintered glass funnel and washed consecutively with H2O, 3N HCl (2×), H2O, NaHCO3 solution (2×) and H2O. The filter cake was air dried, added to a 500 mL round bottom flask with toluene and concentrated under reduced pressure. Additional toluene (200 mL) was added and the mixture was concentrated again under reduced pressure to yield {4-[2-Oxo-2-(3-trifluoromethyl-phenyl)-ethylcarbamoyl]-cyclohexylmethyl}-carbamic acid benzyl ester as a solid. 1H NMR (DMSO-d6): δ0.8–0.93 (m, 2H), 1.2–1.37 (m, 3H), 1.71 (br s, 4H), 2.14 (t, 1H), 2.84 (br s, 2H), 4.57 (br s, 2H), 4.99 (s, 2H), 7.2–7.38 (m, 5H), 7.77(t, 1H), 8.01 (d, J=8.0 Hz, 1H), 8.14–8.26 (m, 3H). MS 477 (M+H)+

1. customfor a preparation of this reagent
2. customto produce a thick precipitate
3. customThe solid was collected on a sintered glass funnel
4. washwashed consecutively with H2O, 3N HCl (2×), H2O, NaHCO3 solution (2×) and H2O
5. customdried
6. additionadded to a 500 mL round bottom flask with toluene
7. concentrationconcentrated under reduced pressure
8. additionAdditional toluene (200 mL) was added
9. concentrationthe mixture was concentrated again under reduced pressure