Catalytic Hydrogenation of Amides to Amines under Mild Conditions
作者:Mario Stein、Bernhard Breit
DOI:10.1002/anie.201207803
日期:2013.2.18
Under (not so much) pressure: A general method for the hydrogenation of tertiary and secondary amides to amines with excellent selectivity using a bimetallic Pd–Re catalyst has been developed. The reaction proceeds under low pressure and comparatively low temperature. This method provides organic chemists with a simple and reliable tool for the synthesis of amines.
Bequeme Darstellung von reinen N-Methylalkylaminen durch Zink/Salzsäure-Reduktion von 1,3,5-Tris(alkyl)-hexahydro-1,3,5-triazinen
作者:Mohammed Al Shaik、Herbert Oelschläger
DOI:10.1002/ardp.19843170306
日期:——
N‐Methyl‐alkylamine können bequem und rasch über die 1,3,5‐Tris(alkyl)‐hexahydro)‐1,3,5‐triazine durch Reduktion mit Zink/Salzsäure bei −5° im Zutropfverfahren gewonnen werden. Die Reinheit (GC) beträgt ∼ 95%.
Investigation of the Mechanism of C(sp<sup>3</sup>)−H Bond Cleavage in Pd(0)-Catalyzed Intramolecular Alkane Arylation Adjacent to Amides and Sulfonamides
作者:Sophie Rousseaux、Serge I. Gorelsky、Benjamin K. W. Chung、Keith Fagnou
DOI:10.1021/ja103081n
日期:2010.8.11
reactivity of C(sp(3))-H bonds adjacent to a nitrogen atom can be tuned to allow intramolecular alkane arylation under Pd(0) catalysis. Diminishing the Lewis basicity of the nitrogen lone pair is crucial for this catalytic activity. A range of N-methylamides and sulfonamides react exclusively at primary C(sp(3))-H bonds to afford the products of alkane arylation in good yields. The isolation of a Pd(II) reaction
Photocatalytic Intramolecular C–H Amination Using <i>N</i>-Oxyureas as Nitrene Precursors
作者:Ryan A. Ivanovich、Dilan E. Polat、André M. Beauchemin
DOI:10.1021/acs.orglett.0c02200
日期:2020.8.21
Nitrenes are remarkable high-energy chemical species that enable direct C–N bond formation, typically via controlled reactions of metal-stabilized nitrenes. Here, in contrast, the combined use of photocatalysis with careful engineering of the precursor enabled C–H amination forming imidazolidinones and related nitrogen heterocycles from readily accessible hydroxylamine precursors. Preliminary mechanistic
作者:Jean Bowler、Timothy J. Lilley、John D. Pittam、Alan E. Wakeling
DOI:10.1016/0039-128x(89)90076-7
日期:1989.7
A series of steroidal estrogen antagonists with no intrinsic estrogenicity in rat uterotrophic-antiuterotrophic tests has been discovered. The compounds are derivatives of estradiol containing amidoalkyl side chains at the 7 alpha-position. The most potent compounds are N-n-butyl-N-methyl-11-(3,17 beta-dihydroxyestra- 1,3,5(10)-trien-7 alpha-yl) undecanamide and N-2,2,3,3,4,4,4-heptafluorobutyl-N-methyl-11-(3