Palladium-catalysed cross-coupling reaction of ultra-stabilised 2-aryl-1,3-dihydro-1<i>H-</i>benzo[<i>d</i>]1,3,2-diazaborole compounds with aryl bromides: A direct protocol for the preparation of unsymmetrical biaryls
作者:Siphamandla Sithebe、Ross S Robinson
DOI:10.3762/bjoc.10.109
日期:——
are versatile coupling partners in metal-catalysed cross-couplingreactions. On the other hand, their nitrogen analogues, namely, 1,3,2-benzodiazaborole-type compounds have been studied extensively for their intriguing absorption and fluorescence characteristics. Here we describe the first palladium-catalysed Suzuki-Miyaura cross-couplingreaction of easily accessible and ultra-stabilised 2-aryl-1
Phenylboronicacid (2) reacts quantitatively by ball-milling in the solid state with o-phenylendiamine, 1,8-diaminonaphthalene, anthranilicacid, pyrocatechol, pyrogallol, pinacol, bicyclic cis-diols, mannitol, and inositol to form the five- or six-membered cyclic phenylboronic amides or esters. Catalysts or other auxiliaries are strictly excluded as they are not required and would have to be removed
Boric Acid-Catalyzed Direct Condensation of Carboxylic Acids with Benzene-1,2-diamine into Benzimidazoles
作者:Nenad Maraš、Marijan Kočevar
DOI:10.1002/hlca.201100064
日期:2011.10
applicability of boric acid catalysis for the direct condensation of carboxylicacids with benzene‐1,2‐diamine to give 2‐substituted benzimidazoles was investigated. It was found that catalytic amounts (5–10 mol‐%) of boric acid efficiently promote the cyclocondensation of aliphatic carboxylicacids in refluxing toluene. In addition, the relatively neutral conditions allow the use of acid‐sensitive substrates
Synthesis of Functionalized 1,3,2-Benzodiazaborole Cores Using Bench-Stable Components
作者:Geraint H. M. Davies、Gary A. Molander
DOI:10.1021/acs.joc.6b00435
日期:2016.5.6
including organotrifluoroborates, enabling a wider array of substrate analogues under facile reaction conditions. Furthermore, physical, structural, and electronic properties of these compounds were explored computationally to understand the influence of the B–N replacement on the structure, aromaticity, and isosteric viability of these analogues.
NBN‐Doped Conjugated Polycyclic Aromatic Hydrocarbons as an AIEgen Class for Extremely Sensitive Detection of Explosives
作者:Wen‐Ming Wan、Di Tian、Ya‐Nan Jing、Xiao‐Yun Zhang、Wei Wu、Hao Ren、Hong‐Li Bao
DOI:10.1002/anie.201809844
日期:2018.11.19
efficient synthesis of NBN‐doped conjugated polycyclicaromatichydrocarbons (such as diazaborinines) has been accomplished by a catalyst‐free intermolecular dehydration reaction at room temperature between boronic acid and diamine moieties with yields up to 99 %. Polycyclicaromatichydrocarbons with a six‐membered NBN ring are a new class of aggregation‐induced emissive luminogens. Extremely sensitive detection