Enantioselective Synthesis of Quaternary α-Aminophosphonates via Conjugate Addition of α-Nitrophosphonates to Enones
摘要:
Enantioselective Michael addition of alpha-nitrophosphonates to enones for the synthesis of alpha-aminophosphonates is reported for the first time. The reaction proceeds in good to high yields and moderate to high selectivity in the presence of a new quinine thiourea catalyst. The quaternary nitrophosphonates were conveniently transformed to cyclic quaternary alpha-aminophosphonates via in situ reduction intramolecular cyclization or Baeyer-Villiger oxidation followed by in situ reduction intramolecular cyclization.
[EN] COMPOSITIONS USEFUL IN THERAPY OF AUTOPHAGY-RELATED PATHOLOGIES, AND METHODS OF MAKING AND USING THE SAME [FR] COMPOSITIONS UTILES EN THÉRAPIE DE PATHOLOGIES LIÉES À L'AUTOPHAGIE, ET LEURS PROCÉDÉS DE FABRICATION ET D'UTILISATION
Preparation of α-ketophosphonates by a [3,3]-sigmatropoic shift of enolphosphonates
作者:Kamyar Afarinkia、Andrew J. Twist、Hiu-wan Yu
DOI:10.1016/j.jorganchem.2004.10.016
日期:2005.5
α-Ketophosphonates are prepared by a [3,3]-sigmatropicshift of enolphosphonates.
α-酮膦酸酯是通过烯醇膦酸酯的[3,3]-σ位移而制备的。
[EN] COMPOSITIONS USEFUL IN THERAPY OF AUTOPHAGY-RELATED PATHOLOGIES, AND METHODS OF MAKING AND USING THE SAME<br/>[FR] COMPOSITIONS UTILES EN THÉRAPIE DE PATHOLOGIES LIÉES À L'AUTOPHAGIE, ET LEURS PROCÉDÉS DE FABRICATION ET D'UTILISATION
申请人:UNIV TOLEDO
公开号:WO2017147440A1
公开(公告)日:2017-08-31
Lanthionine ketimine derivatives, and methods of making and using the same, are described. Included are lanthionine ketimine phosphonate (LK-P), lanthionine ketimine ester phosphonate (LKE-P) derivatives, as well as lanthionine ketimine derivatives having a tert-enamide moiety at the 2-position (NVP-LKE).
Preparation of Asymmetric α-Ketophosphonates by [3,3]-Sigmatropic Shift of Enolphosphonates
作者:Kamyar Afarinkia、Andrew J. Twist、Hiu-wan Yu
DOI:10.1021/jo049133j
日期:2004.9.1
α-Ketophosphonates are prepared by a [3,3]-sigmatropicshift of enolphosphonates.
α-酮膦酸酯是通过烯醇膦酸酯的[3,3]-σ位移制备的。
A novel route to .alpha.-aminoalkylphosphonic acids and dialkyl .alpha.-aminoalkylphosphonate hydrochlorides
作者:K. Darrell Berlin、N. K. Roy、R. T. Claunch、D. Bude
DOI:10.1021/ja01018a076
日期:1968.7
Enantioselective synthesis of diethyl 1-hydroxyalkylphosphonates via oxazaborolidine catalyzed borane reduction of diethyl α-ketophosphonates
作者:Tadeusz Gajda
DOI:10.1016/s0957-4166(00)86271-0
日期:1994.10
Reduction of diethyl alpha-ketophosphonates 1 with borane and B-butyloxazaborolidine 2 as catalyst afforded diethyl (S)- or (R)-1-hydroxyalkylphosphonates 3a-d or 3e-f respectively in good yields and moderate to good enantiomeric excess (53-83 ee%). Respective diethyl (R)- and (S)-1-aminoalkylphosphonates 6 were obtained in a one-pot transformation, by the Mitsunobu reaction of 1-hydroxyphosphonates 3 with hydrazoic acid, and subsequent treatment of the intermediate azides 4, with triphenylphosphine, followed by hydrolysis df the iminophosphoranes 5 with water.