反应详情

To a solution of 4-benzyloxy-3-ethyl-5-methyl-benzoic acid (224 mg, 0.83 mmol) in DMF (5 mL), EDC (175 mg, 0.91 mmol) and HOBt (124 mg, 0.91 mmol) are added. The mixture is stirred at rt for 15 min before DIPEA (0.57 mL, 3.3 mmol) and a solution of crude [4-(2-amino-1,1-diethoxy-ethyl)-6-methyl-pyrimidin-2-yl]-isopropyl-amine dihydrochloride (174 mg, 0.83 mmol) in DMF (2.0 mL) is added. The mixture is stirred at rt for 4 h, diluted with EtOAc (30 mL), and washed with sat. aq. NaHCO3 (15 mL) and brine (15 mL). The org. extract is dried over Na2SO4, filtered and concentrated. The crude product is purified on prep. TLC plates with Heptane/EtOAc 1:1 to give 4-benzyloxy-N-[2,2-diethoxy-2-(2-isopropylamino-6-methyl-pyrimidin-4-yl)-ethyl]-3-ethyl-5-methyl-benzamide (348 mg) as a yellow oil; LC-MS: tR=1.02 min, [M+H]+=535.22.

1. washwashed with sat. aq. NaHCO3 (15 mL) and brine (15 mL)
2. extractionextract
3. dry with materialis dried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated
6. customThe crude product is purified on prep