Efficient Synthesis of Readily Water-Soluble Amides Containing Sulfonic Groups

Abstract

A series of various readily water-soluble amides were synthesized by different procedures. These compounds are useful chemical tracers for assessing the cooling progress in a georeservoir during geothermal power plant operation. Acylation of primary amines was carried out by basically employing the Schotten–Baumann method. As a second method a single-phase solvent system consisting of ethyl acetate as an organic solvent and triethylamine as a catalyst was used. Products were characterized by ¹H NMR and ¹³C NMR.

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GRAPHICAL ABSTRACT

Keywords:

• Brine
• primary amines
• Schotten–Baumann reaction
• sulfonic acid amides

ACKNOWLEDGMENT

The presented study was funded by the German Ministry of Environment (BMU) (promotional reference no. 0325417, Reaktherm). This support is gratefully acknowledged.