Process for making secondary amphoacetates and diacetates

摘要

Process for making secondary amphoacetate and amphodiacetate of the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="22" wi="103" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" /></Chemistry> wherein R<Sup>1</Sup> is C<Sub>8</Sub>-C<Sub>18</Sub>-alkyl or C<Sub>8</Sub>-C<Sub>18</Sub>-alkenyl, R<Sup>2</Sup> is hydrogen or a group of the formula -CH<Sub>2</Sub>COOM and M is alkaline or alkaline earth metal, which comprises heating a compound of the formula 2
<Chemistry id="chema02" num="0002"><Image id="ia02" he="27" wi="61" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" /></Chemistry> at pH between 7 - 14, at a temperature of 80 to 90 deg C and for at least 24 hours and subsequent reaction with an aqueous solution of chloroacetic acid or is alkali salt at a pH from 7 fo 14 and a temperature of 80 to 90°C.

Due to the long period for the ring opening in the first step predominantly secondary products are obtained which are advantageous in that they show a low viscosity of their aqueous solution.