Method of preparing amino carboxylic acids
US6265605A · kind A · utility
5Cited by
23References
2Claims
0Family size
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Key dates
| Filing date | Feb 7, 2000 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Feb 7, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D251/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel compounds, N,N'-bis(phosphonomethyl)-N,N'-bis(hydroxycarbonylmethyl)urea and N,N,N',N'-tetrakis(hydroxycarbonylmethyl)urea, suitable for use in preparing N-acyl aminocarboxylic acids that can be readily converted to N-(phosphonomethyl)glycine are provided. The compounds may be formed by the reaction of bis-(phosophonomethyl)urea or urea respectively with carbon monoxide and formaldehyde in the presence of a carboxymethylation catalyst precursor and solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.