反应详情

To a solution of 4-[5-(2-diethylamino-6-methyl-pyridin-4-yl)-[1,2,4]oxadiazol-3-yl]-2-ethyl-6-methyl-phenol (500 mg, 1.36 mmol) in isopropanol (15 mL) and 3 N aq. NaOH (6 mL), (S)-epichlorohydrine (378 mg, 4.09 mmol) is added. The orange solution is stirred at rt for 24 h before another portion of (S)-epichlorohydrine is added. Stirring is continued for 24 h, the mixture is diluted with EA, washed with sat. aq. NaHCO3-solution, dried over MgSO4, filtered and concentrated. The crude product is purified by CC on silica gel eluting with heptane:EA 4:1 to give diethyl-{4-[3-((R)-3-ethyl-5-methyl-4-oxiranylmethoxy-phenyl)-[1,2,4]oxadiazol-5-yl]-6-methyl-pyridin-2-yl}-amine (430 mg) as a yellow oil; LC-MS: tR=0.96 min; [M+1]+=423.21.

1. additionis added
2. washwashed with sat. aq. NaHCO3-solution
3. dry with materialdried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated
6. customThe crude product is purified by CC on silica gel eluting with heptane:EA 4:1