Oxalyl chloride → HCID 86682247, compound

To a solution of 2-(methylthio)propanoic acid (0.36 g, 3.00 mmol) in DCM (3 mL) was added oxalyl dichloride (0.29 ml, 3.31 mmol) followed by one drop of DMF. The reaction mixture was stirred for 30 min before all of the solvent was evaporated. The resulting residue was dissolved in DCM (2 mL) and the solution was added to a pre-stirred solution of 3-chloro-N-(prop-2-yn-1-yl)-1-(pyridin-3-yl)-1H-pyrazol-4-amine (0.35 g, 1.50 mmol) and N-ethyl-N-isopropylpropan-2-amine (0.57 ml, 3.31 mmol) in DCM (5.5 mL). The reaction mixture was stirred at ambient temperature for 16 h. The reaction mixture was concentrated and the residue was purified using silica gel chromatography (0-100% EtOAc/hexanes) to afford the title compound as a yellow oil (432 mg, 1.23 mmol, 85%): 1H NMR (400 MHz, CDCl3) δ 8.97 (d, J=2.5 Hz, 1H), 8.66-8.60 (m, 1H), 8.25 (s, 1H), 8.08-8.01 (m, 1H), 7.49-7.42 (m, 1H), 4.86 (s, 1H), 4.29-3.97 (m, 1H), 3.31 (d, J=6.5 Hz, 1H), 2.30-2.24 (m, 1H), 2.09 (s, 3H), 1.46 (d, J=6.9 Hz, 3H); 13C NMR (101 MHz, CDCl3) δ 171.30, 148.66, 140.71, 140.18, 135.71, 127.87, 126.35, 124.11, 122.12, 78.53, 72.92, 53.39, 37.97, 16.42, 11.07; ESIMS m/z 335 ([M+H]+).

1. customwas evaporated
2. dissolutionThe resulting residue was dissolved in DCM (2 mL)
3. stirringThe reaction mixture was stirred at ambient temperature for 16 h
4. concentrationThe reaction mixture was concentrated
5. customthe residue was purified

ORD record

ord-e5196051d2e14f3b9ed9668935c1d5ce

Source dataset

uspto-grants-2015_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08937083B2