In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 5521-58-4 as follows. Recommanded Product: 5-Methylpyrazin-2-amine
Oxalyl chloride (1.9 mL, 22.2 mmol) and DMF (1 drop) were added to a solution of 3- [(phenylmethyl)oxy]-5-[(3^-tetrahydrofuran-3-yloxy]benzoic acid (5.8 g, 18.5 mmol) in DCM (100 mL) and the mixture stirred at RT for 16 hours. The mixture was evaporated in vacuo to a residue which was redissolved in DCM (25 mL) and added to a stirred mixture of 2-amino-5-methylpyrazine (2.22 g, 20.35 mmol) and pyridine (1.81 mL, 22.2 mmol) in DCM (100 mL) at 50C – 1O0C. The mixture was stirred at RT for 18 hours, the DCM evaporated in vacuo to give a residue which was partitioned between water (50 mL) and ethyl acetate (125 mL). The organic layer was washed with brine, dried (MgSO4) and evaporated to a residue which was chromatographed on silica, eluting with 60% ethyl acetate in isohexane, to give the desired material (5.1 g). 1H NMR delta (CDCl3): 2.1 – 2.2 (m, 2H), 2.5 (s, 3H), 3.8 – 3.95 (m, 4H), 4.9 (m, IH), 5.0 (s, 2H), 6.6 (s, IH), 6.95 (s, IH), 7.05 (s, IH), 7.35 (m, 5H), 8.05 (s, IH), 8.3 (s, IH), 9.5 (s, IH); m/z 406 (M+H)+.
According to the analysis of related databases, 5521-58-4, the application of this compound in the production field has become more and more popular.
Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/125972; (2006); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem