Preparation of N-(phosphonoacetyl)-L-aspartic acid

Details Preparation of N-(phosphonoacetyl)-L-aspartic acid Preparation of N-(phosphonoacetyl)-L-aspartic acid

1978-08-10

1979-12-11

Evans, Joseph E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

560171, 260544Y, C07F 938

Patent

active

041783069

ABSTRACT:
Improved methods for preparation of the tetrasodium and disodium salts ofN-(phosphonoacetyl)-L-aspartic acid (PALA) are disclosed. The present methods are well suited for preparation of these products in large amounts. Particular aspects of these methods include: (1) the initial preparation of phosphonoacetyl chloride which is employed in producing the desired products; and (2) the use of anhydrous conditions for preparation and isolation of the cyclohexylammonium salt of dibenzyl PALA.

REFERENCES:
patent: 3417098 (1968-12-01), Angtol
patent: 4016148 (1977-04-01), Ratcliffe et al.
patent: 4072710 (1978-02-01), Coll

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