Process for making secondary amphoacetates and diacetates
US6025522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1999 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Apr 30, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C231/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for making secondary amphoacetate and amphodiacetate of the formula ##STR1## wherein R.sup.1 is C.sub.8 -C.sub.18 -alkyl or C.sub.8 -C.sub.18 -alkenyl, R.sup.2 is hydrogen or a group of the formula --CH.sub.2 COOM and M is alkaline or alkaline earth metal, which comprises heating a compound of the formula 2 ##STR2## 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.degree. 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.