3-chloro-1H-indole-4-carbonitrile → HCID 84022392, Verbindung

To a solution of 3-chloro-1H-indole-4-carbonitrile (630.0 mg, 3.57 mmol) in ammonia in MeOH (2M, 45 mL) was added Raney Ni (3.05 g) in water (2 mL). The reaction mixture was then hydrogenated under H2 balloon at 1 atm for 20 h. The reaction mixture was filtered through a pad of Celite®, and the pad was washed alternatively with MeOH (10 mL×3) and water (10 mL×3). Volatile solvents were removed from the filtrate. The remaining crude was extracted with EtOAc (3×75 mL). The combined organic layers were dried (Na2SO4), filtered, and concentrated in vacuo. Crystallization from ether/heptane afforded (3-chloro-1H-indol-4-yl)methanamine (133) as a white solid (633 mg, 98.2%). 1H NMR (400 MHz, DMSO) δ 11.33 (br s, 1H), 7.44 (s, 1H), 7.27 (d, J=8.0 Hz, 1H), 7.11-7.01 (m, 2H), 4.18 (s, 2H), 1.73 (br s, 2H).

1. customfor 20 h
2. filtrationThe reaction mixture was filtered through a pad of Celite®
3. washthe pad was washed alternatively with MeOH (10 mL×3) and water (10 mL×3)
4. customVolatile solvents were removed from the filtrate
5. extractionThe remaining crude was extracted with EtOAc (3×75 mL)
6. dry with materialThe combined organic layers were dried (Na2SO4)
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customCrystallization from ether/heptane

ORD-Eintrag

ord-af03cfb4a8b4418bbe8073b75a65e9a7

Quelldatensatz

uspto-grants-2014_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08637537B2