6863-73-6, A common compound: 6863-73-6, name is 3-Chloropyrazin-2-amine, belongs to Pyrazines compound, it can change the direction of chemical reaction, and react with certain compounds to generate new functional products. A new synthetic method of this compound is introduced below.
EXAMPLE 1; Tert-butyl 4-(8-(2-fluoro-4-(methylsulfonyl)phenylamino)imidazo[l,2- a]pyrazin-3-yl)-5,6-dihydropyridine-l(2H)-carboxylateStep 1: 8-Chloroimidazo[l,2-a]pyrazine[0313] 3-chloropyrazin-2-amine (21.0 g, 161.54 mmol, 1.00 equiv) was dissolved in isopropyl alcohol (200 mL) in a 500 mL round-bottom flask equipped with a reflux condenser. To this solution was added 2-bromo-l,l-diethoxyethane (160.3 g, 813.71 mmol, 5.00 equiv) in small portions over 10 minutes. The resulting mixture was then allowed to reflux for 2 hours in an oil bath. The reaction was monitored by TLC (EtOAc/PE = 1:1). The mixture was cooled down to room temperature and filtered off to give a yellow cake. The solid was added to a saturated solution of NaHCC>;3 (200 mL) and DCM (IL). Aqueous layer was separated from organic phase and re-extracted with DCM (2x 250 mL). The combined organics were dried over MgSO4, filtered and evaporated to dryness affording 8-chloroimidazo[l,2-a]pyrazine (25 g) as a yellow solid.
In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 3-Chloropyrazin-2-amine, other downstream synthetic routes, hurry up and to see.
Reference:
Patent; KALYPSYS, INC.; KAHRAMAN, Mehmet; SMITH, Nicholas, D.; BONNEFOUS, Celine; NOBLE, Stewart, A.; PAYNE, Joseph, E.; WO2010/88518; (2010); A2;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem