Synthetic Route of 1209646-17-2, These common heterocyclic compound, 1209646-17-2, name is 5-(4-(tert-Butoxycarbonyl)piperazin-1-yl)pyrazine-2-carboxylic acid, its 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.
Example 214Step 1: Synthesis of 5′-(3-{ l-r4-(2-Amino-pyrimidin-5-yl)-phenyll-cyclobutyl|- r i,2,41oxadiazol-5-yl)-2,3,5,6-tetrahydro-r i,2’lbipyrazinyl-4-carboxylic acid tert-butyl ester (R81)To a suspension of R80 (490 mg, 1.59 mmol) in dioxane (10 ml) is added CDI (260 mg, 1.59 mmol) at room temperature. The mixture is stirred at 50 C for 30 minutes. After this time 1-2.5 (300 mg, 1.06 mmol) is added and the resulting mixture is heated at 80 C for 18 hours. After this time the reaction appears complete and is cooled and poured into NaHCC”3 (sat.) and EtOAc. The layers are separated and the aqueous phase is extracted with EtOAc (2x). The combined organics are dried (MgS04), filtered and concentrated to give the crude product which is purified via flash chromatography (25g silica gel, 0-8% MeOH/DCM). Product-containing fractions are combined and concentrated to give R81. (210 mg)
The synthetic route of 1209646-17-2 has been constantly updated, and we look forward to future research findings.