Triphenylphosphine → tert-butyl 3-({[6-({4-[(1-methyl-1H-pyrazol-3-yl)amino]quinazolin-6-yl}oxy)pyridin-3-yl]oxy}methyl)azetidine-1-carboxylate

Participants

Reaction Steps

Tert-butyl 3-(hydroxymethyl)azetidine-1-carboxylate (110 mg, 0.60 mmol), triphenyl phosphine (160 mg, 0.60 mmol) and diethyl azodicarboxylate (0.095 mmol, 0.60 mmol) were added to a tetrahydrofuran solution (3 ml) of 6-({4-[(1-methyl-1H-pyrazol-3-yl)amino]quinazolin-6-yl}oxy)pyridin-3-ol (100 mg, 0.30 mmol) obtained in Example 6-3), and the reaction solution was stirred at room temperature for 30 minutes. The reaction solution was diluted with chloroform, the organic layer was washed with water and saturated saline water, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (chloroform:methanol=96:4) and amine-type silica gel column chromatography (hexane:ethyl acetate=50:50) to obtain tert-butyl 3-({[6-({4-[(1-methyl-1H-pyrazol-3-yl)amino]quinazolin-6-yl}oxy)pyridin-3-yl]oxy}methyl)azetidine-1-carboxylate (136 mg, yield: 90%) as a pale yellow amorphous solid.

Provenance & Evidence