Arbuzov-type reaction of acylphosphonites and N-alkoxycarbonylimine cations generated in situ with trifluoroacetic anhydride
作者:Maxim E. Dmitriev、Valery V. Ragulin
DOI:10.1016/j.tetlet.2012.01.094
日期:2012.3
N-protected α-aminoalkylphosphinic acids by the reaction of N,N′-benzylidene- or N,N′-alkylidenebiscarbamates, trifluoroaceticanhydride and the corresponding alkylphosphonous acids in methylene chloride or toluene is described. The results obtained confirm the earlier proposed mechanism for amidoalkylation of hydrophosphorylic compounds involving an Arbuzov-type reaction step.
interaction of hydrophosphoryl compounds previously synthesized with biscarbamates in acetic anhydride and other solvents, the influence of the structure of phosphorus component and biscarbamate, and the effect of acid catalysis on the course of this two-component reaction. A new version of the mechanism of the three-component reaction of amidoalkylation of hydrophosphoryl compounds is suggested: it is regarded
作者:S. R. Golovash、O. S. Grigorkevich、G. S. Tsebrikova、M. E. Dmitriev、V. V. Ragulin
DOI:10.1134/s1070363220040313
日期:2020.4
AbstractThe amidoalkylation reactions of a phosphonous acid containing a structural isostere of leucine in acetyl chloride and(or) acetic anhydride were studied under conditions of acid catalysis. A two-component method for the synthesis of a phosphinic analogue of alanylleucine using ethylidenebis(benzylcarbamate) was proposed.
Acyloxy derivatives of trivalent phosphorus in amidoalkylation of hydrophosphoryl compounds
作者:M. E. Dmitriev、V. V. Ragulin
DOI:10.1134/s1070363213100150
日期:2013.10
In order to model the previously suggested mechanism of the P-C bond formation via the Arbuzov reaction, we have studied the interaction of diethylacylphosphite (prepared beforehand as well as generated in situ from tetraethylpyrophosphite) with the in situ generated acyliminium cation. Various conditions of in situ generation of acylphosphite derivatives of P(III) from hydrophosphoryl compounds and acyliminium ions from N,N'-alkylidenebiscarbamates have been investigated: solvent nature, acid catalyst, and the reagents mixing order). The results obtained have confirmed the suggested mechanism of three-component reaction of amidoalkylation of hydrophosphoryl compounds with the formation of P-C bond via the Arbuzov reaction of in situ formed intermediates.
Acetals and N,N′-alkylidenebiscarbamates in the synthesis of N-protected α-aminophosphinic acids