Tetrahydrofuran → 2-{4-[6-(3-Dipropylamino-propyl)-pyridin-2-yl]-benzyl}-isoindol-1,3-dione

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Reaction Steps

An anhydrous THF solution (1.0 ml) containing 2-propenyl dipropylamine (158 mg) was cooled with ice and a 0.5 mol/l 9-borabicyclo-[3,3,1]-nonane(9-BBN)/THF solution (2.06 ml) was dropped thereto. The whole was gradually warmed to room temperature and stirred for 5 hours. After that, a 1,1′-bis(diphenylphosphino)ferrocene-palladium(II) dichloride dichloromethane complex (PdCl2 (dppf)) (210 mg) and the compound (300 mg) obtained in Example 36-3 were added thereto together with DMF (3.0 ml), and a 3 mol/l aqueous solution (0.86 ml) of cesium fluoride was added thereto. The whole was stirred at 80° C. for 23 hours and then heated to 100° C. and stirred for 2 hours. After the resultant was cooled to room temperature, a solid component was separated by filtration and the solvent was distilled off. The concentrate was dissolved in chloroform, washed with saturated aqueous sodium hydrogen carbonate solution, extracted with chloroform, and dried with anhydrous magnesium sulfate, followed by distillating off the solvent. The resultant residue was purified through silica gel column chromatography (chloroform/methanol), thereby obtaining the subject compound (44.0 mg) as a pale-brown liquid.

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