Benzylamine → 2-amino-N-benzylisonicotinamide

To a solution of 2-aminoisonicotinic acid (2.76 g, 20.0 mmol) in N,N-dimethylformamide (60 mL) was added 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (5.00 g, 26.0 mmol) and N,N-diisopropylethylamine (10 mL, 57.7 mmol). The resulting solution was stirred for 30 minutes at ambient temperature followed by the addition of 1-hydroxybenzotriazole (3.24 g, 24.0 mmol) and benzylamine (3.2 mL, 29.3 mmol). The reaction mixture was stirred for 72 hours at ambient temperature, diluted with water (30 mL) and extracted with ethyl acetate (200 mL×4). The combined organic layers were washed with brine (30 mL), dried over anhydrous sulphate, filtered and concentrated in vacuo. The residue was triturated with ethyl acetate and hexanes (in a 1:10 ratio), filtered and dried in vacuo to give 2-amino-N-benzylisonicotinamide as a colorless solid (1.97 g, 43%): NMR (300 MHz, CDCl3) δ 8.11-8.09 (m, 1H), 7.37-7.27 (m, 5H), 6.88-6.82 (m, 2H), 6.42 (br s, 1H), 4.60 (d, J=5.7 Hz, 2H); MS (ES+) m/z 228.5 (M+1).

1. stirringThe reaction mixture was stirred for 72 hours at ambient temperature
2. extractionextracted with ethyl acetate (200 mL×4)
3. washThe combined organic layers were washed with brine (30 mL)
4. dry with materialdried over anhydrous sulphate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was triturated with ethyl acetate and hexanes (in a 1:10 ratio),
8. filtrationfiltered
9. customdried in vacuo

ORDレコード

ord-2ce83e2286b9477f9c717cceb74dfe1d

出典データセット

uspto-grants-2015_11

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US09187426B2