| 摘要 |
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.
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