反应详情

Acetone (0.019 ml, 0.26 mmol) was added to a methanol solution (1 ml) of 6-{[5-(azetidin-3-yloxy)pyridin-2-yl]oxy}-N-(1-methyl-1H-pyrazol-3-yl)quinazoline-4-amine (50 mg, 0.13 mmol) obtained in Example 6-5), stirred for 10 minutes, then a methanol solution (1.7 ml, 0.26 mmol) of 0.15 M zinc cyanotrihydroborate was added and stirred for 1 hour. 1 N sodium hydroxide was added to the reaction solution, then extracted with a mixed solution of chloroform/methanol (9:1). The organic layer was washed with saturated saline water, then dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by thin-layer silica gel column chromatography (chloroform:methanol=90:10) to obtain 6-({5-[(1-isopropylazetidin-3-yl)oxy]pyridin-2-yl}oxy)-N-(1-methyl-1H-pyrazol-3-yl)quinazoline-4-amine. The compound was dissolved in methanol, then aqueous 5 M hydrochloric acid solution (0.017 ml, 0.085 mmol) was added and concentrated under reduced pressure to obtain the entitled compound (40 mg, yield: 67%) as a pale yellow solid.

1. stirringstirred for 1 hour
2. extractionextracted with a mixed solution of chloroform/methanol (9:1)
3. washThe organic layer was washed with saturated saline water
4. dry with materialdried over anhydrous sodium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe obtained residue was purified by thin-layer silica gel column chromatography (chloroform:methanol=90:10)