Studies on Organophosphorus Compounds XLVII: Acetyl Chloride - A Versatile Reagent for the Synthesis of 1-Aminoalkyl- and Amino(aryl)methylphosphonic Acid Derivatives
Studies on Organophosphorus Compounds XLVII: Acetyl Chloride - A Versatile Reagent for the Synthesis of 1-Aminoalkyl- and Amino(aryl)methylphosphonic Acid Derivatives
作者:Chengye Yuan、Shoujun Chen、Guohong Wang
DOI:10.1055/s-1991-26503
日期:——
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.
Studies on Organophosphorus Compounds XXVIII. An Improved Synthetic Route to 1-Amino-Substituted Benzyl Phosphonic and -Phosphinic Acids
作者:Chengye Yuan、Youmao Qi
DOI:10.1055/s-1988-27610
日期:——
An improved method for the synthesis of 1-aminosubstituted benzyl phosphonic and -phosphinic acids under mild conditions is described. It consists of the reaction of diphenoxy chlorophosphine (1) or dichlorophenylphosphine (6) with substituted benzaldehydes 2 and a phosphoramidate 3 in the presence of a Lewis acid, followed by selective cleavage of the protective group of the resultant 1-(phosphorylamino)-substituted benzylphosphonate 4 or phosphinate 7, 9. A tentative reaction mechanism is postulated.
作者:N. V. Kolotilo、A. A. Sinitsa、Yu. V. Rassukanaya、P. P. Onys’ko
DOI:10.1134/s1070363206080068
日期:2006.8
A procedure for preparing N-sulfonyl- and N-phosphorylbenzimidoylphosphonates by oxidation of the corresponding alpha-(sulfonylamino)- and alpha-(phosphorylamino)benzylphosphonates was developed. The sigma constants of imidoylphosphonate groups were evaluated by F-19 NMR spectroscopy, and specific features of their electronic effects were considered. The reactions of the imidoylphosphonates obtained with O-, S-, P-, and N-nucleophiles were studied. The phosphonate-phosphoramidate rearrangement of alpha-aminobenzylidene-bisphosphonates was found.