反应详情

In a flask were mixed together the above prepared 5-chloro-6-(1-isopropyl-piperidin-4-yloxy)-3-methyl-benzofuran-2-carboxylic acid (0.200 g, 0.406 mmol, corrected for purity), 4,4-difluoropiperidine hydrochloride (0.077 g, 1.2 eq.), (benzotriazol-1-yloxy)-tris-(dimethylamino)phosphonium hexafluorophosphate (0.216 g, 1.2 eq.) and 2.4 eq. of N-ethyldiisopropylamine (0.166 mL) in 4 mL of abs. THF and stirred over night at ambient temperature. Pouring onto crashed ice/AcOEt/NH4Cl-solution, twofold extraction with AcOEt, washing with water and brine, drying over magnesium sulfate, and evaporation of the solvents, followed by flash chromatography (SiO2, NEt3/AcOEt=2/98) yielded 0.183 g of the title compound as white solid.

1. additionIn a flask were mixed together the
2. additionPouring
3. extractionextraction with AcOEt
4. washwashing with water and brine
5. dry with materialdrying over magnesium sulfate, and evaporation of the solvents