Synthesis of highly functionalized 2,2'-bipyridines by cyclocondensation of β-ketoenamides – scope and limitations
作者:Paul Hommes、Hans-Ulrich Reissig
DOI:10.3762/bjoc.12.112
日期:——
The scope of a flexible route to unsymmetrically functionalized bipyridines is described. Starting from 1,3-diketones 1a-e, the corresponding beta-ketoenamines 2a-e were converted into different beta-ketoenamides 3a-g by N-acylation with 2-pyridinecarboxylic acid derivatives. These beta-ketoenamides were treated with a mixture of TMSOTf and Hunig's base to promote the cyclocondensation to 4-hydroxypyridine
realized under basic conditions via the copper-catalyzed cyclization of ketones with nitriles. The reaction proceeds via a novel pathway involving the nitriles acting as electrophiles and consecutive C–C bond and two C–N bond formations and shows broad substrate scope and good tolerance of many important functional groups. This strategy represents a new platform for constructing pyrimidine structures.
Late-Stage C–H Alkylation of Heterocycles and 1,4-Quinones via Oxidative Homolysis of 1,4-Dihydropyridines
作者:Álvaro Gutiérrez-Bonet、Camille Remeur、Jennifer K. Matsui、Gary A. Molander
DOI:10.1021/jacs.7b05899
日期:2017.9.6
heterocyclic bases and 1,4-quinones. DHPs are readily prepared from aldehydes, and considering that aldehydes normally require harsh reaction conditions to take part in such transformations, with mixtures of alkylated and acylated products often being obtained, this net decarbonylative alkylation approach becomes particularly useful. The present method takes place under mild reaction conditions and requires
[EN] 1H- PYRROLO [2, 3 -B] PYRIDINE DERIVATIVES AND THEIR USE AS RADICAL QUENCHERS<br/>[FR] DÉRIVÉS 1H-PYRROLO [2,3-B] PYRIDINE ET LEUR UTILISATION COMME AGENTS DE TREMPE DE RADICAUX
申请人:UNIV ARIZONA
公开号:WO2013120081A1
公开(公告)日:2013-08-15
The present disclosure provides biologically active compounds of formula (I): and pharmaceutically acceptable salts thereof, compositions comprising these compounds, and methods of using these compounds in a variety of applications, such as treatment or suppression of diseases associated with decreased mitochondrial function resulting in diminished ATP production and/or oxidative stress and/or lipid peroxidation.