Hydrochloric Acid → 3-amino-5-(5-methyl-1H-pyrazol-4-yl)thiophene-2-carboxamide
Reaction equation
CC1(C)[NH:7][C:6]2[CH:8]=[C:9]([C:11]3[CH:12]=[N:13][NH:14][C:15]=3[CH3:16])[S:10][C:5]=2[C:4](=[O:17])[NH:3]1.Cl>CO>[NH2:7][C:6]1[CH:8]=[C:9]([C:11]2[CH:12]=[N:13][NH:14][C:15]=2[CH3:16])[S:10][C:5]=1[C:4]([NH2:3])=[O:17]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A mixture of 2,2-dimethyl-6-(5-methyl-1H-pyrazol-4-yl)-2,3-dihydrothieno[3,2-d]pyrimidin-4(1H)-one (1.97 g, 7.51 mmol), 1 M aqueous HCl. (38 mL) and MeOH (38 mL) was stirred at 50° C. for 4 h. After removal of the solvent at reduced pressure, the organic materials were extracted with EtOAc/THF. The combined extracts were dried over Na2SO4 and filtered. After removal of the solvent at reduced pressure, the residue was purified by column chromatography (Purif, silica gel, EtOAc to 90:10 EtOAc/MeOH) to give the title compound (1.20 g, 72%) as a green solid: