Iodine/Water-Mediated Oxidation of<i>o</i>-Alkynylaroyl Compounds and Application of the Products of Oxidation in the Synthesis of Nitrogen Heterocycles
作者:Karuppusamy Sakthivel、Kannupal Srinivasan
DOI:10.1002/ejoc.201300046
日期:2013.6
facile iodine/water-mediated oxidation of the triple bond of o-alkynylaroyl compounds to furnish tricarbonyl compounds is reported. The reaction proceeds through the formation of isochromenol intermediates by the assistance of the neighbouring aroyl group. The product tricarbonyl compounds are versatile synthetic precursors that, upon treatment with mono- and diamines, hydrazines and amino alcohols, afford
A mild and efficient method for the synthesis of diverse isoindolinones from o-phthaldehydic acid methylthiomethyl ester and aliphatic/aromatic amines has been developed A number of nucleophiles Including a hydride ion were Successfully added to the intermediate Schiff's base providing iso-indolinones. with or Without substitution at 3-position Conditions have also been developed for amines with an integrated nucleophilic group to react in a diverse fashion either to give isoindolinones or tricyclic gamma-lactams as single diastereoisomers in very good yield (C) 2010 Elsevier Ltd All rights reserved
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