Water → 1-(2,3-Dihydro-1-benzofuran-7-yl)methanamine

Temperature

0 °C

The product of Example 48C (2.2 g) in tetrahydrofuran (10 mL) was treated with lithium aluminumhydride (0.71 g) in tetrahydrofuran (20 mL) at 0° C. dropwise. The mixture was stirred at 0° C. for 90 minutes then carefully treated in succession with water (0.7 mL), 15% sodium hydroxide (0.7 mL) and water (2.1 mL). After stirring overnight, the mixture was filtered through celite, the filter cake was washed with tetrahydrofuran (70 mL), and the filtrate concentrated under reduced pressure. The crude was dissolved in diethylether, washed with water, and extracted with 1N hydrochloric acid (2×20 mL). The acidic extracts were combined, basified with potassium carbonate, and extracted with methylene chloride (4×). The organic extracts were combined, dried (potassium carbonate), filtered, and the filtrate was concentrated under reduced pressure to provide the title compound. MS (DCI/NH3) m/z 150 (M+H)+;

1. stirringAfter stirring overnight
2. filtrationthe mixture was filtered through celite
3. washthe filter cake was washed with tetrahydrofuran (70 mL)
4. concentrationthe filtrate concentrated under reduced pressure
5. dissolutionThe crude was dissolved in diethylether
6. washwashed with water
7. extractionextracted with 1N hydrochloric acid (2×20 mL)
8. extractionextracted with methylene chloride (4×)
9. dry with materialdried (potassium carbonate)
10. filtrationfiltered
11. concentrationthe filtrate was concentrated under reduced pressure

ORD record

ord-ca1bccb907074883b4355c7275d991b7

Source dataset

uspto-grants-2010_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07704997B1