Novel intermediates for the production of derivatives of 2- (2-aminothiazol-4-yl) glyoxylic acid or a salt thereof and the method for producing said intermediate

DERIVATIVE 2-AMINOTHIAZOLE REPRESENTED BY THE GENERAL FORMULA OR ITS SALTS: (CF DRAWING IN BOPI) WHERE R IS AN AMINO GROUP THAT MAY BE PROTECTED AND R IS MONOHALOGENOMETHYLE GROUPS, OR alkylthiocarbonyl ARALKYLTHIOCARBONYLE. THE SAME IS USEFUL FOR THE PREPARATION OF DERIVATIVES ACID 2- (2-aminothiazol-4-yl) GLYOXYLIC AND THEIR SALTS, WHO SERVE THE PREPARATION ANTIBIOTICS TYPE OF CEPHALOSPORINS.