Diisopropylamine → 3-Methoxy-indeno[1,2-b]pyridin-5-one

温度

0 °C

Under an argon atmosphere, a 2.66M solution (1.96 ml) of n-butyllithium in n-hexane was added to a solution of N,N-diisopropylamine (0.734 ml) in tetrahydrofuran (20 ml) at 0° C., and the mixture was stirred at 0° C. for 30 min. To this mixture was added a solution (10 ml) of 2-(5-methoxy-pyridin-2-yl)-benzoic acid diethylamide (1.14 g) in tetrahydrofuran at 0° C. and the mixture was stirred at 0° C. for 30 min, and further at room temperature for 1 hr. To the reaction mixture was added aqueous ammonium chloride solution and the mixture was placed in a separatory funnel, and separated into layers by adding ethyl acetate. The organic layer was successively washed with water and saturated brine, dried over anhydrous sodium sulfate, and filtered. The filtrate was concentrated under reduced pressure and the obtained residue was treated with ethyl ether at room temperature for 1 hr. This slurry was filtered, and the obtained solid was dried to give the title compound (0.183 g, 22%). The filtrate was concentrated under reduced pressure and the obtained residue was treated with ethyl ether at room temperature for 20 min. This slurry was filtered, and the obtained solid was dried to further give the title compound (0.128 g, 15%). The filtrate was concentrated under reduced pressure and the obtained residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=3/1) to further give the title compound (0.134 g, 16%).

1. stirringthe mixture was stirred at 0° C. for 30 min
2. waitfurther at room temperature for 1 hr
3. customthe mixture was placed in a separatory funnel
4. customseparated into layers
5. additionby adding ethyl acetate
6. washThe organic layer was successively washed with water and saturated brine
7. dry with materialdried over anhydrous sodium sulfate
8. filtrationfiltered
9. concentrationThe filtrate was concentrated under reduced pressure
10. additionthe obtained residue was treated with ethyl ether at room temperature for 1 hr
11. filtrationThis slurry was filtered
12. customthe obtained solid was dried

ORDレコード

ord-dfb711062686465d8e2eebf65e7bc7fd

出典データセット

uspto-grants-2013_01

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08343994B2