Hydrochloric Acid → 2-(5-Amino-1,2,4-thiadiazol-3-yl)-2-methoxyiminoacetic acid

反応式

[CH3:1][O:2][N:3]=[C:4]([C:8]1[N:12]=[C:11]([NH:13]C=O)[S:10][N:9]=1)[C:5]([OH:7])=[O:6].[OH-].[Na+].Cl.[Cl-].[Na+]>>[CH3:1][O:2][N:3]=[C:4]([C:8]1[N:12]=[C:11]([NH2:13])[S:10][N:9]=1)[C:5]([OH:7])=[O:6]

参加物

反応物 4

HCID 313Hydrochloric Acid

HCID 5234Sodium Chloride

HCID 14798Sodium Hydroxide

HCID 544280122-Methoxyimino-2-(5-formamido-1,2,4-thiadiazol-3-yl)acetic acid

生成物 1

HCID 533952072-(5-Amino-1,2,4-thiadiazol-3-yl)-2-methoxyiminoacetic acid収率 73.2%

実験手順

A solution of 2-methoxyimino-2-(5-formamido-1,2,4-thiadiazol-3-yl)acetic acid (syn isomer) (1.4 g) in 1 N aqueous solution of sodium hydroxide (19.1 ml) was heated at 50° to 55° C. for an hour. To the solution was added conc.hydrochloric acid (1.9 ml) under cooling in an ice-bath. The mixture was saturated with sodium chloride and extracted with ethyl acetate. The extract was dried over anhydrous magnesium sulfate and evaporated to dryness. The residue was triturated with diethyl ether to give the title compound (0.9 g), mp 180° to 182° C. (dec.).