Benzylamine → HCID 7945658, compound

To a stirred mixture of 3-methyl-2-thiophenecarboxylic acid (5.00 g, 35.17 mmol), 1-hydroxybenzotriazole (7.13 g, 52.73 mmol) and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (10.11 g, 52.74 mmol) in anhydrous N,N-dimethylformamide (50 mL) was added N,N-diisopropylethylamine (18.4 mL, 105.6 mmol), followed by benzylamine (3.84 mL, 35.19 mmol). The resulting reaction mixture was stirred at ambient temperature for 18 h, and partitioned between ethyl acetate (200 mL) and 10% aqueous hydrochloric acid (100 mL). The organic layer was washed with 10% aqueous hydrochloric acid (100 mL), saturated aqueous sodium bicarbonate (2×100 mL) and water (100 mL), dried over sodium sulfate, filtered and concentrated in vacuo. The residue was triturated with 5% ethyl acetate in hexanes to afford the title compound as a colorless solid (6.63 g, 81%): 1H NMR (300 MHz, CDCl3) δ 7.40-7.25 (m, 6H), 6.90 (d, J=4.9 Hz, 1H), 6.08 (br s, 1H), 4.62 (d, J=5.6 Hz, 2H), 2.53 (s, 3H); MS (ES+) m/z 232.3 (M+1).

1. customThe resulting reaction mixture
2. custompartitioned between ethyl acetate (200 mL) and 10% aqueous hydrochloric acid (100 mL)
3. washThe organic layer was washed with 10% aqueous hydrochloric acid (100 mL), saturated aqueous sodium bicarbonate (2×100 mL) and water (100 mL)
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was triturated with 5% ethyl acetate in hexanes

ORD record

ord-24c92ec79e1845a38c1e050b86a15d57

Source dataset

uspto-grants-2012_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08258160B2