We report meta‐ and para‐selective linear alkylation reactions of anilides with alkenes by nickel/N‐heterocyclic carbene (NHC) and aluminumcatalysis. With a less bulky NHC, the alkylation reaction of N‐methyl‐N‐phenylcyclohexanecarboxamides proceeded mainly at the meta position. In contrast, a bulky NHC ligand led to the para‐selective alkylation of N‐sec‐alkyl anilides.
Pd(II)-Catalyzed Chemoselective Acetoxylation of C(sp<sup>2</sup>)–H and C(sp<sup>3</sup>)–H Bonds in Tertiary Amides
作者:Muniyappa Vijaykumar、Benudhar Punji
DOI:10.1021/acs.joc.1c00629
日期:2021.6.18
Palladium-catalyzed chemoselective C(sp2)–H and C(sp3)–H acetoxylation of synthetically useful tertiary amides is reported under relatively mild reaction conditions. This protocol proceeds through the assistance of a weakly coordinated directing group (C═O) and requires low catalyst (1.0 mol %) loading. Diverse functionalities, such as C(sp2)–Cl, C(sp3)–Cl, −CF3, −COOEt, and −NO2 groups, including
Studying competitive lithiations at alpha-, ortho-, and benzylic positions in various N-protected aniline derivatives
作者:Martin Schmid、Birgit Waldner、Michael Schnürch、Marko D. Mihovilovic、Peter Stanetty
DOI:10.1016/j.tet.2011.02.056
日期:2011.4
The directing effects of the t-BuOCONH– (NHBoc) and the t-BuCONH– (NH–pivaloyl) groups have been investigated on a series of differently substituted anilines. Depending on the nature of the directing group and the substrate, lithiation either occurred in the ortho-, benzylic-, or alpha-position. In general, it was observed that ortho-lithiation is the least facile process and alpha-lithiation slightly
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.