Some common heterocyclic compound, 681249-57-0, name is 2-(Trifluoromethyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[1,5-a]pyrazine, molecular formula is C6H7F3N4, 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. SDS of cas: 681249-57-0
To the CH2Cl2 solution of 4-(4-(bromomethyl)benzyloxy)-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione (0.13 g, 0.284 mmol) was added 2-(trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyrazine (0.060 g, 0.313 mmol) and N-ethyl-N-isopropylpropan-2-amine (0.152 ml, 0.853 mmol). The mixture was stirred at room temperature overnight. To the reaction mixture was added water (10 mL) and CH2Cl2 (10 mL) and extracted. The organic layer was concentrated and the resulted oil was purified on silica gel column eluted with MeOH and CH2Cl2 to give 2-(2,6-dioxo-piperidin-3-yl)-4-[4-(2-trifluoromethyl-5,6,8,8a-tetrahydro-1H-[1,2,4]triazolo[1,5-a]pyrazin-7-ylmethyl)-benzyloxy]-isoindole-1,3-dione as a white solid (120 mg, 74%). Melting point: 128-130 C. LC-MS m/e=569. HPLC Waters Symmetry C-18, 3.9¡Á150 mm, 5 micro, 1 mL/min, 240 nm, isocratic 50/50 CH3CN/0.1% H3PO4 in H2O=3.64 min (99%); 1H NMR (DMSO-d6) delta 1.94-2.12 (m, 1H, CHH), 2.41-2.47 (m, 1H, CHH), 2.54-2.67 (m, 1H, CHH), 2.77-2.95 (m, 1H, CHH), 3.01 (t, J=5.4 Hz, 2H, CH2), 3.81 (d, J=7.6 Hz, 4H, CH2, CH2), 4.24 (t, J=5.1 Hz, 2H, CH2), 5.09 (dd, J=5.4, 12.7 Hz, 1H, NCH), 5.37 (s, 2H, CH2), 7.37-7.55 (m, 5H, Ar), 7.61 (d, J=8.5 Hz, 1H, Ar), 7.76-7.88 (m, 1H, Ar), 11.11 (s, 1H, NH); 13C NMR (DMSO-d6) delta 21.95, 30.90, 46.54, 47.67, 48.73, 49.21, 59.42, 69.89, 115.53, 116.59, 120.21, 127.42, 128.95, 133.26, 135.25, 136.99, 137.06, 152.84, 155.50, 165.29, 166.75, 169.87, 172.71. Anal Calcd for C27H23F3N6O5+0.5 H2O+0.2 Et2O: C, 56.37%; H, 4.42%; N, 14.19%; Found C, 56.27%; H, 4.20%; N, 14.05%.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 681249-57-0, its application will become more common.
Reference:
Patent; Man, Hon-Wah; Muller, George W.; Ruchelman, Alexander L.; Khalil, Ehab M.; Chen, Roger Shen-Chu; Zhang, Weihong; US2011/196150; (2011); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem