The invention relates to a sulphonic acid salt of an amino acid alkyl ester The invention further relates to a process for the esterification of an organic acid into the corresponding organic acid ester comprising bringing the organic acid into contact with a strong acid and a solution comprising dialkylcarbonate in a reaction mixture. The invention further relates to the use of a sulphonic acid salt of an amino acid alkyl ester in the synthesis of a β-lactam antibiotic.
                            该发明涉及一种
氨基酸烷基酯的
磺酸盐。该发明还涉及一种将有机酸酯化为相应的有机酸酯的方法,包括将有机酸与强酸和含二烷基
碳酸酯的溶液在反应混合物中接触。该发明还涉及在β-内酰胺抗生素的合成中使用
氨基酸烷基酯的
磺酸盐。