Process for preparing n-alkylated aminoalkylphosphonates

Details Process for preparing n-alkylated aminoalkylphosphonates Process for preparing n-alkylated aminoalkylphosphonates

1976-11-10

1978-04-11

Raymond, Richard L.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

260932, 260945, C07F 940

Patent

active

040838978

ABSTRACT:
N-Alkylated aminoalkylphosphonates having the structural formula: ##STR1## where R.sup.1,R.sup.4 and R.sup.5 are straight or branched lower alkyl having one to five carbon atoms; R.sup.2 and R.sup.3 are selected from the group consisting of straight or branched lower alkyl having one to five carbon atoms and hydrogen and n is the integer 1 or 2, are prepared with acid numbers from about 5 to about 15 by contacting an amine and a phosphite and then adding this to an aqueous solution of an aldehyde or ketone. The reaction temperature is kept below about 70.degree. C. and water is removed under reduced pressure.

REFERENCES:
patent: 2635112 (1953-04-01), Fields
patent: 2870190 (1959-01-01), Burgert et al.
patent: 3555124 (1971-01-01), Beck et al.

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