Methanol → HCID 86689170, compound

Reaction equation

[CH3:1][O:2][C:3]([C:5]1[C:10]([NH2:11])=[N:9][C:8](/[CH:12]=[CH:13]\[O:14][CH2:15]C)=[CH:7][N:6]=1)=[O:4].CO.[C:19]([O-])(O)=[O:20].[Na+]>Cl>[CH3:1][O:2][C:3]([C:5]1[C:10]([NH2:11])=[N:9][C:8]([CH2:12][CH:13]([O:14][CH3:15])[O:20][CH3:19])=[CH:7][N:6]=1)=[O:4]

Participants

Procedure

A solution of 3-amino-5-((Z)-2-ethoxy-vinyl)-pyrazine-2-carboxylic acid methyl ester (220 mg, 0.986 mmol) in 3M HCl in MeOH (210 μl, 6.90 mmol) was heated at 55° C. over night. A solution of 10% of NaHCO3 was added the mixture was extracted with EtOAc. The combined organic layer was dried with Na2SO4, filtered and concentrated under reduced pressure to obtain a brown solid (141 mg). The crude material was directly used in the next step without further purification.