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.
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.
Heterodienophiles. 10. Stereoselectivity in the 1,4-cycloaddition of N-(ethoxycarbonyl)-C-alkylaldiminium ions with 1,3-cyclohexadiene
作者:Grant R. Krow、Kenneth J. Henz、Steven W. Szczepanski
DOI:10.1021/jo00211a021
日期:1985.5
Acetals and N,N′-alkylidenebiscarbamates in the synthesis of N-protected α-aminophosphinic acids
作者:M. E. Dmitriev、V. V. Ragulin
DOI:10.1134/s107036321211028x
日期:2012.11
Highly Stereoselective Ene Reaction of Aldimines with 2-(Alkylthio)allyl Silyl Ethers
作者:Yoshitomo Tohyama、Keiji Tanino、Isao Kuwajima
DOI:10.1021/jo00082a004
日期:1994.2
A stereoselective ene reaction of aldimines with 2-(alkylthio)allyl silyl ethers was developed. Under the influence of Lewis acids, N-acylimine or geminal biscarbamates reacted with a (Z)-2-(methylthio)allyl silyl ether to afford syn adducts in >94% selectivity.