The Photoredox-Catalyzed Meerwein Addition Reaction: Intermolecular Amino-Arylation of Alkenes
作者:Durga Prasad Hari、Thea Hering、Burkhard König
DOI:10.1002/anie.201307051
日期:2014.1.13
A variety of amides are efficiently accessible under mild conditions by intermolecular amino‐arylation using a photo Meerwein addition with visible light. The reaction has a broad substrate scope, tolerates a large range of functional groups, and was applied to the synthesis of a 3‐aryl‐3,4‐dihydroisoquinoline.
Oxyarylation and Aminoarylation of Styrenes Using Photoredox Catalysis
作者:Gabriele Fumagalli、Scott Boyd、Michael F. Greaney
DOI:10.1021/ol401940c
日期:2013.9.6
A three-component coupling of styrenes is reported, using photoredoxcatalysis to achieve simultaneous arylation and C–O or C–N bond formation across the styrene double bond.
Photolysis of α-Azidoacetophenones: Direct Detection of Triplet Alkyl Nitrenes in Solution
作者:Pradeep N. D. Singh、Sarah M. Mandel、Rachel M. Robinson、Zhendong Zhu、Roberto Franz、Bruce S. Ault、Anna D. Gudmundsdóttir
DOI:10.1021/jo034674e
日期:2003.10.1
of triplet alkyl nitrenes in fluid solution by laser flash photolysis of alpha-azido acetophenone derivatives, 1. Alphazides 1 contain an intramolecular triplet sensitizer, which ensures formation of the triplet alkyl nitrene by bypassing the singlet nitrene intermediate. At room temperature, azides 1 cleave to form benzoyl and methylazide radicals in competition with triplet energy transfer to form
Gold-Catalysed Oxyarylation of Styrenes and Mono- and<i>gem</i>-Disubstituted Olefins Facilitated by an Iodine(III) Oxidant
作者:Liam T. Ball、Guy C. Lloyd-Jones、Christopher A. Russell
DOI:10.1002/chem.201103061
日期:2012.3.5
1‐Hydroxy‐1,2‐benziodoxol‐3(1H)‐one (IBA) is an efficient terminal oxidant for gold‐catalysed, three‐component oxyarylation reactions. The use of this iodine(III) reagent expands the scope of oxyarylation to include styrenes and gem‐disubstituted olefins, substrates that are incompatible with the previously reported Selectfluor‐based methodology. Diverse arylsilane coupling partners can be employed
[EN] SELECTIVE C-O BOND CLEAVAGE OF OXIDIZED LIGNIN AND LIGNIN-TYPE MATERIALS INTO SIMPLE AROMATIC COMPOUNDS<br/>[FR] COUPURE SÉLECTIVE DE LIAISON C-O DE LIGNINE OXYDÉE ET DE SUBSTANCES DE TYPE LIGNINE EN COMPOSÉS AROMATIQUES SIMPLES
申请人:WISCONSIN ALUMNI RES FOUND
公开号:WO2015138563A1
公开(公告)日:2015-09-17
A method to cleave C-C and C-0 bonds in β-Ο-4 linkages in lignin or lignin sub-units is described. The method includes oxidizing at least a portion of secondary benzylic alcohol groups in β-Ο-4 linkages in the lignin or lignin sub-unit to corresponding ketones and then leaving C-0 or C-C bonds in the oxidized lignin or lignin sub-unit by reacting it with an organic carboxylic acid, a salt of an organic carboxylic acids, and/or an ester of an organic carboxylic acids. The method may utilize a metal or metal-containing reagent or proceed without the metal or metal-containing reagent.