Methanol → 4-Cyclopropylpyridin-3-amine

Zinc powder (223.2 mg, 3.41 mmol) and ammonium chloride solution (365 mg, 6.8 mmol) were added to a stirred solution of 4-cyclopropyl-3-nitropyridine (I-1a: 70 mg, 0.426 mmol) in dry THF (2 mL) at 0° C. and the resulting mixture was stirred at room temperature for 1 hour. The reaction was monitored by TLC (10% methanol in CHCl3). The reaction mixture was filtered over celite bed and washed with THF and filtrate was concentrated. The residue was dissolved in ethyl acetate and washed with water and saturated brine and dried over sodium sulphate and concentrated to afford 450 mg of the product (100% yield).

1. filtrationThe reaction mixture was filtered over celite bed
2. washwashed with THF and filtrate
3. concentrationwas concentrated
4. dissolutionThe residue was dissolved in ethyl acetate
5. washwashed with water and saturated brine
6. dry with materialdried over sodium sulphate
7. concentrationconcentrated

ORD record

ord-92509081ede143e1824eae99d56c09fe

Source dataset

uspto-grants-2016_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09339501B2