Process for the preparation of organosulfate salts of amino acids esters

US11739052B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Sophia Ebert · Mannheim, DE
• Dieter Boeckh · Schifferstadt, DE
• Dawid Marczewski · Schifferstadt, DE
• Stefano Scialla · Cincinnati, US
• Brian Joseph Loughnane · Sharonville, US
• Frank Huelskoetter · Bad Dürkheim, DE

Key dates

• Filing date: Dec 18, 2019
• Grant date: Aug 29, 2023
• Expiry date: Jan 4, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C303/24
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the synthesis of organosulfate salts of amino acid esters comprising the steps of reacting at least one lactam with at least 3 carbon atoms in the lactam ring with sulfuric acid in an aqueous solution followed by esterification of the reaction product of the previous step with at least 200 mol-% of at least one alcohol selected from the group consisting of linear alkyl alcohol containing one hydroxy group, branched alkyl alcohol containing one hydroxy group, linear alkylether alcohol containing one hydroxy group, branched alkylether alcohol containing one hydroxy group, phenoxyalkanols containing one hydroxy group, and mixtures thereof; followed optionally removal of water and/or removal of excess alcohol.