Triethylamine → 3-[(Acetyloxy)methyl]-7-[[2-[4-(chloromethyl)phenyl]-2-aminoacetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

Beteiligte Stoffe

Reaktionsschritte

p-Chloromethylphenylglycine wherein the amino group is protected with tert-butoxycarbonyl, is treated with isobutyl chloroformate in the presence of triethylamine. The thus obtained mixed anhydride is reacted with the triethylamine salt of 3-[(acetyloxy)methyl]-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2carboxylic acid at 0° C for about 4 hours. The resulting product is isolated and the amine protecting group is removed by acid hydrolysis to give 3-[(acetyloxy)methyl]-7-[[2-[4-(chloromethyl)phenyl]-2-aminoacetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2carboxylic acid.

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