Application of 1174321-06-2,Some common heterocyclic compound, 1174321-06-2, name is 5-(Difluoromethyl)pyrazine-2-carboxylic acid, molecular formula is C6H4F2N2O2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
A mixture of Example 130E (0.05 g, 0.146 mmol), 5-(difluoromethyl)pyrazine-2- carboxylic acid (0.029 g, 0.168 mmol) and N-ethyl-N-isopropylpropan-2-amine (0.102 mL, 0.583 mmol) in N,N-dimethylformamide (1.5 mL) was treated with 2-(3H-[l ,2,3]triazolo[4,5- Z?]pyridin-3-yl)- l ,l ,3,3-tetramethylisouronium hexafluorophosphate(V) (0.083 g, 0.219 mmol), and the reaction was stirred at ambient temperature for 30 minutes. Volatiles were removed under high vacuum, and the residue was purified by HPLC (10-95% acetonitrile in 0.1% trifluoroacetic acid/water on Phenomenex CI 8 5 mupiiota (250 mm x 21.2 mm) column at a flowrate of 25 mL/minute) to give 43 mg of the title compound as a solid. JH NMR (400 MHz, DMSO- ) delta ppm 9.19 (d, J = 1.4 Hz, 1H), 8.94 (d, J = 1.2 Hz, 1H), 8.03 (s, 1H), 7.45 (t, J = 8.9 Hz, 1H), 7.28 (d, J = 6.0 Hz, 1H), 7.16 (m, 1H), 7.07 6.98 (m, 1H), 6.80 (ddd, J = 9.0, 2.9, 1.2 Hz, 1H), 5.13 (d, J = 4.4 Hz, 1H), 4.44 (s, 2H), 4.08 (ddd, J = 9.9, 5.4, 3.1 Hz, 1H), 2.39 (ddd, J = 12.6, 9.5, 2.5 Hz, 1H), 2.13 2.01 (m, 2H), 1.95 (q, J = 4.8, 2.6 Hz, 1H), 1.94 1.76 (m, 6H); MS (ESI+) m/z 499.1 (M+H)+.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 5-(Difluoromethyl)pyrazine-2-carboxylic acid, its application will become more common.
Reference:
Patent; CALICO LIFE SCIENCES LLC; ABBVIE INC.; MARTIN, Kathleen, Ann; SIDRAUSKI, Carmela; FROST, Jennifer, M.; PLIUSHCHEV, Marina, A.; TONG, Yunsong; BLACK, Lawrence, A.; XU, Xiangdong; SHI, Lei; ZHANG, Qingwei, I.; CHUNG, Seungwon; SWEIS, Ramzi, Farah; DART, Michael, J.; RANDOLPH, John, T.; MURAUSKI, Kathleen; (674 pag.)WO2019/90076; (2019); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem