Studies on Organophosphorus Compounds XLVII: Acetyl Chloride - A Versatile Reagent for the Synthesis of 1-Aminoalkyl- and Amino(aryl)methylphosphonic Acid Derivatives

Abstract

Acetyl chloride is used successfully in the synthesis of 1-aminoalkyl- and amino(aryl)methylphosphonic acid derivatives by a three-component condensation reaction involving diethyl phosphoramidate, aldehydes and diphenyl phosphite. Furthermore, in the reaction of benzyl carbamate, aldehydes and phosphorus(III) chloride, acetyl chloride facilates the formation of alkyl hydrogen 1-(benzyloxycarbonylamino)alkylphosphonates or aryl(benzyloxycarbonylamino) methylphosphonates, key intermediates in the synthesis of phosphonopeptide with a P-N bond. In comparison with other methods, the present variation affords wider scope of application including the use of some aliphatic aldehydes, fair yields and mild reaction conditions.