Citric Acid → HCID 57879506, compound

Participants

Reaction Conditions

Reaction Steps

0.030 mL of 3-bromopyridine, 0.10 g of cesium carbonate, 15 mg of tetrabutylammonium bromide and 24 mg of polymer supported bis(acetato)triphenylphosphine palladium(II) were added to 1.0 mL of toluene solution containing 50 mg of tert-butyl 2-(benzamido)-4-vinylbenzoate at room temperature and stirred at 110° C. for 24 hours. After the reaction mixture was cooled to room temperature, 24 mg of polymer supported bis(acetato)triphenylphosphine palladium(11) was added and stirred at 110° C. for 24 hours. After the reaction mixture was cooled to room temperature, ethyl acetate and 10% citric acid aqueous solution were added. The organic layer was separated and dried over anhydrous magnesium sulfate after washed with 10% citric acid aqueous solution and a saturated sodium chloride aqueous solution sequentially, and the solvent was evaporated under reduced pressure. 10 mL of trifluoroacetic acid was added to the obtained residue and stirred at room temperature for 1 hour. The solvent was evaporated under reduced pressure and the obtained residue was purified with reversed-phase silica gel column chromatography [eluent; 40-90% acetonitrile/0.1% trifluoroacetic acid aqueous solution]. Ethyl acetate and water were added to the obtained purified substance and pH was adjusted to pH 6.0 with a saturated sodium hydrogen carbonate aqueous solution. The organic layer was separated and dried over anhydrous magnesium sulfate after washed with water, and the solvent was evaporated under reduced pressure to obtain 2.3 mg of 2-(benzamido)-4-((E)-2-(pyridin-3-yl)vinyl)benzoic acid as white solid.

Provenance & Evidence