4-(4-Piperidyl)pyridine → 5-chloro-3-(2-methoxyphenyl)-3-[2-oxo-2-(4-pyridin-4-yl piperidin-1-yl)ethyl]-1,3-dihydro-2H-indol-2-one

Participants

Reaction Steps

To a solution of 720 mg of [5-chloro-3-(2-methoxyphenyl)-2-oxo-2,3-dihydro-1H-indol-3-yl]acetic acid, which is the compound described in Preparation 1.1 of the brochure WO03/008407 and 350 mg of 4-piperidin-4-yl pyridine obtained in Step 51-1 in CHCl3 (15 ml) was added 500 mg of HOBt/H2O, stirred for 15 minutes, then, 500 mg of EDC/HCl was added. The solution was stirred for 11 hours, then, water was added and the resulting mixture was extracted with CHCl3. The organic layer was washed with water saturated brine, dried over Na2SO4, then, the drying agent was separated by filtration, and the solvent was evaporated under reduced pressure. The obtained residue was purified by column chromatography (first time: silicagel 60; mobile phase: CHCl3/MeOH=9/1 to 5/1; second time: silica gel NH; mobile phase: CHCl3/MeOH=19/1) to obtain 850 mg of the title compound (colorless amorphous).

Provenance & Evidence