US2003088122A1PendingUtilityA1

Method of preparing amino carboxylic acids

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Priority: Feb 13, 1997Filed: May 20, 2002Published: May 8, 2003
Est. expiryFeb 13, 2017(expired)· nominal 20-yr term from priority
Inventors:Todd J. JohnsonMichael K. SternDavid A. MorgensternMichael D. RogersYvette M. FobianJeffrey A. Levine
C07F 9/3813C07C 275/16C07C 227/00C07D 251/04C07D 251/14C07D 241/18C07C 231/08
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Claims

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.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A compound having the formula:  
       
         
           
           
               
               
           
         
         wherein R 1  is hydrogen, hydrocarbyl, substituted hydrocarbyl, —NR 3 R 4 , or —SR 6 ;  
         R 3  and R 4  are independently hydrogen, hydrocarbyl, or substituted hydrocarbyl; and  
         R 6  is hydrogen, hydrocarbyl, substituted hydrocarbyl, or a salt-forming cation.  
       
     
     
         2 . The compound as set forth in  claim 1 , wherein R 1  is methyl.  
     
     
         3 . The compound as set forth in  claim 1 , wherein R 1  is —NR 3 R 4 .

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