Triphenylphosphine → (4-Tert-butylphenyl)-{4-[6-methoxy-7-(4-piperidinylmethoxy)-4-quinolyloxy]phenyl}amine

Participants

Reaction Steps

(4-Tert-butylphenyl)-[4-(6-methoxy-7-hydroxy-4-quinolyloxy)-phenyl]amine (compound 21) (0.8 g) (starting compound A), tert-butyl-4-(hydroxymethyl)-1-piperidine carboxylate (0.59 g) (starting compound B), and triphenylphosphine (0.85 g) were dissolved in tetrahydrofuran (25 ml), and the solution was stirred at room temperature for 20 min. Under ice cooling, 40% diethyl azodicarboxylate (1.5 ml) was added to the reaction solution, and the mixture was stirred at room temperature overnight. Water and ethyl acetate were added to the reaction solution. The mixture was extracted with ethyl acetate, and the extract was washed with saturated brine and was dried over sodium sulfate. The solvent was removed by evaporation under the reduced pressure. The crude was dissolved in a 30% trifluoroacetic acid/chloroform solution (15 ml), and the solution was stirred at room temperature for 30 min. The solvent was removed by evaporation under the reduced pressure, and the residue was then purified by chromatography on silica get using chloroform/acetone for development to give (4-tert-butylphenyl)-{4-[6-methoxy-7-(4-piperidinylmethoxy)-4-quinolyloxy]phenyl}amine (0.84 g, yield 86%).

Provenance & Evidence