Sulfu00c8nico acid salt, process for the esterification of an organic acid in the corresponding ester of organic acid and the use of a salt of acid sulfu00c8nico alkyl ester of amino acid of a

摘要

Sulfu00c8nico acid salt, process for the esterification of an organic acid ester of the acid in the corresponding organic acid salt and the use of a sulfonico an alkyl ester of an amino acid. The present invention relates to a salt of sulfonic acid alkyl ester of an amino acid.The invention also relates to a process for the esterification of an organic acid in its corresponding ester of organic acid, comprising contacting the organic acid with a strong acid and a solution comprising Di alkyl carbonate in a reactional mixture.The invention also relates to the use of a salt of an alkyl ester sulfu00e2nico acid amino acid in the synthesis of an antibiotic 198 - lactam.