[EN] AZETIDINE DERIVATIVES FOR THE TREATMENT OF INTEGRIN ASSOCIATED DISEASES [FR] DÉRIVÉS D'AZÉTIDINE POUR LE TRAITEMENT DE MALADIES SE RAPPORTANT AUX INTÉGRINES
A Radical Approach to Anionic Chemistry: Synthesis of Ketones, Alcohols, and Amines
作者:Shengyang Ni、Natalia M. Padial、Cian Kingston、Julien C. Vantourout、Daniel C. Schmitt、Jacob T. Edwards、Monika M. Kruszyk、Rohan R. Merchant、Pavel K. Mykhailiuk、Brittany B. Sanchez、Shouliang Yang、Matthew A. Perry、Gary M. Gallego、James J. Mousseau、Michael R. Collins、Robert J. Cherney、Pavlo S. Lebed、Jason S. Chen、Tian Qin、Phil S. Baran
DOI:10.1021/jacs.9b02238
日期:2019.4.24
Historically accessed through two-electron, anionicchemistry, ketones, alcohols, and amines are of foundational importance to the practice of organic synthesis. After placing this work in proper historical context, this Article reports the development, full scope, and a mechanistic picture for a strikingly different way of forging such functional groups. Thus, carboxylic acids, once converted to redox-active
Decarboxylative Negishi Coupling of Redox‐Active Aliphatic Esters by Cobalt Catalysis
作者:Xu‐Ge Liu、Chu‐Jun Zhou、E. Lin、Xiang‐Lei Han、Shang‐Shi Zhang、Qingjiang Li、Honggen Wang
DOI:10.1002/anie.201806799
日期:2018.10
A cobalt‐catalyzed decarboxylative Negishi coupling reaction of redox‐active aliphatic esters with organozinc reagents was developed. The method enabled efficient alkyl–aryl, alkyl–alkenyl, and alkyl–alkynyl coupling reactions under mild reaction conditions with no external ligand or additive needed. The success of an in situ activation protocol and the facile synthesis of the drug molecule (±)‐preclamol
A cobalt-catalyzed decarboxylative methylation of aliphatic redox-active esters [N-(acyloxy)phthalimides; RAEs] with trimethylaluminum under mild conditions was developed, providing a method for transforming a carboxylate group into a methyl group without redox fluctuation. Primary and secondary RAEs were both amenable substrates, whereas a tertiary RAE delivered an elimination product. Triethylaluminum
脂肪族氧化还原活性酯 [N-(酰氧基)邻苯二甲酰亚胺;RAEs] 与三甲基铝在温和条件下的开发,提供了一种将羧酸盐基团转化为甲基基团而没有氧化还原波动的方法。一级和二级 RAE 都是适合的底物,而三级 RAE 提供消除产物。三乙基铝也用于提供脱羧乙基化产物。
Photochemical generation of acyl and carbamoyl radicals using a nucleophilic organic catalyst: applications and mechanism thereof
作者:Eduardo de Pedro Beato、Daniele Mazzarella、Matteo Balletti、Paolo Melchiorre
DOI:10.1039/d0sc02313b
日期:——
detail a strategy that uses a commercially available nucleophilic organic catalyst to generate acyl and carbamoyl radicals upon activation of the corresponding chlorides and anhydrides via a nucleophilic acyl substitution path. The resulting nucleophilic radicals are then intercepted by a variety of electron-poor olefins in a Giese-type addition process. The chemistry requires low-energy photons (blue
Photochemical Organocatalytic Benzylation of Allylic C–H Bonds
作者:Emilien Le Saux、Margherita Zanini、Paolo Melchiorre
DOI:10.1021/jacs.1c11712
日期:2022.1.26
We report a radical-based organocatalytic method for the direct benzylation of allylic C–H bonds. The process uses nonfunctionalized allylic substrates and readily available benzyl radical precursors and is driven by visible light. Crucial was the identification of a dithiophosphoric acid that performs two distinct catalytic roles, sequentially acting as a catalytic donor for the formation of photoactive