New downstream synthetic route of 1613191-73-3

Statistics shows that Allyl 3,5-diamino-1H-pyrazole-4-carboxylate is playing an increasingly important role. we look forward to future research findings about 1613191-73-3.

Synthetic Route of 1613191-73-3, These common heterocyclic compound, 1613191-73-3, name is Allyl 3,5-diamino-1H-pyrazole-4-carboxylate, 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.

To a suspension of allyl 3,5-diamino-lH-pyrazole-4-carboxylate 3 (63.49 g, 348.5 mmol) in a mixture of DMSO (340 mL) and water (340 mL), was added 3- (dimethoxymethyl)-4,4-dimethoxy-butanenitrile (Scheme 3, below) (85 g, 418.2 mmol), followed by para-toluene Sulfonic acid hydrate (1) (11.27 g, 59.24 mmol). The reaction mixture was heated to 85C and stirred overnight. The reaction mixture was cooled with an ice bath. The mixture was diluted with EtOAc (680 mL) and a saturated aqueous solution of aHC03 (1.36 L). The precipitate was filtered and rinsed with water, then with a mixture of water and EtOAc. The brown solid was dried under vacuum to give allyl 2-amino-6- (cyanomethyl)-pyrazolo[l,5-a]pyrimidine-3-carboxylate 4c as a brown solid (55.94 g, 62% yield).

Statistics shows that Allyl 3,5-diamino-1H-pyrazole-4-carboxylate is playing an increasingly important role. we look forward to future research findings about 1613191-73-3.