| 摘要 |
N-(perfluoroacyl)-N-phosphonomethy gylcine (I; n = 1-4), useful as herbicide, was prepd. by reaction of prefluoroacyl anhydride with N-phosphonomethyl glycine at 35-55≦̸C in excess solvent as perfluoroalkanoic acid. Thus, N-phosphonomethyl glycine 16.9g reacted with trifluoroacetic anhydride 400g in the presence of trifluoro acetic acid 400g at 40-50≦̸C to give Bis(N,O-trifluoroacetyl)-N-phosphonomethyl glycine 36.0g.
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