Reference of 4858-85-9,Some common heterocyclic compound, 4858-85-9, name is 2,3-Dichloropyrazine, molecular formula is C4H2Cl2N2, 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.
To a vial containing 1-tert-butyl 4-methyl piperidine- 1 ,4-dicarboxylate (408 mg, 1.678 mmol) and 2,3-dichloropyrazine (250 mg, 1.678 mmol) in THF (2.5 mL) at rt under N2 is added dropwise LiHMDS (1.678 mL, 1.678 mmol). The reaction was stirred at rt 16 h. The reaction mixture was poured into H2O (10 mL) and extracted with EtOAc (3 x 20 mL). The combined organic layers were washed with saturated NaCl (10 mL), dried (MgSO4), and concentrated. Purification by ISCO (40 g SiO2, 0-75% EtOAc/Hexane) gives 1-tert-butyl 4- methyl 4-(3-chloropyrazin-2-yl)piperidine-l,4-dicarboxylate (565 mg, 1.588 mmol, 95 % yield) as a clear, colorless oil. [M+Na] = 378.0
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2,3-Dichloropyrazine, its application will become more common.
Reference:
Patent; AMGEN INC.; ALLEN, Jennifer R.; BOURBEAU, Matthew P.; CHEN, Ning; HU, Essa; KUNZ, Roxanne; RUMFELT, Shannon; WO2010/57121; (2010); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem