Results 61 to 70 of about 2,786 (190)

Mechanochemical Sequential Deoxygenative Cross-Coupling Reactions of Phenols Under Ruthenium-Nickel Catalysis

Molecules
Herein, we report the first mechanochemical strategy for the Ru-catalyzed deoxygenative borylation of free phenols via C–O bond cleavage. This Ru-catalyzed phenolic borylation approach has been successfully extended to the Suzuki–Miyaura-type cross ...
Satenik Mkrtchyan, Vishal B. Purohit, Michał Jakubczyk, Vaibhav D. Prajapati, Ronak V. Prajapati, Michael G. Garcia, Eugene Karpun, Vitaliy Yepishev, Manoj K. Saini, Sehrish Sarfaraz, Khurshid Ayub, Gabriela Addová, Juraj Filo, Viktor O. Iaroshenko   +13 more
doaj   +1 more source

Lewis‐Acidic Properties and Catalytic Behavior of Hydroboration‐ and Diolysis‐Derived NHC‐Stabilized Borenium Cations

Chemistry – A European Journal, EarlyView.
A series of thirteen (N‐heterocyclic carbene) NHC‐stabilized borenium cations is synthesized from NHC→BH3 complexes via hydroboration and condensation with diols. The novel compounds are fully characterized. Eight crystal structures are presented. Kinetic and NMR data show how the structural features translate to catalytic activity in hydrosilylation ...
Michał Jakubczyk, Michaela Buziková, Matouš Kloda, Miroslava Litecká, Karel Škoch   +4 more
wiley   +1 more source

Trialkoxysilane-Induced Iridium-Catalyzed para-Selective C–H Bond Borylation of Arenes

Nature Communications
An ideal approach for the construction of aryl boron compounds is to selectively replace a C–H bond in arenes with a C–B bond, and controlling regioselectivity is one of the most challenging aspects of these transformations.
Guodong Ju, Zhibin Huang, Yingsheng Zhao
doaj   +1 more source

Alkali‐Metal Base Catalyzed Electrocyclization of Isoprene Derivatives

Chemistry – A European Journal, EarlyView.
Simple and abundant alkali‐metal base catalysis in combination with Lewis basic polyamines enables the electrocyclization of isoprene‐derived trienes to cycloheptadienes under neat conditions. Mechanistic insight supported by DFT guides a scalable route to seven‐membered carbocycles which, after reduction, give saturated cycloalkanes relevant as ...
Mikaël Le Roch, Krzysztof Piech, Aurélien Crochet, Andreu Tortajada   +3 more
wiley   +1 more source

Iridium-catalysed regioselective borylation of carboranes via direct B–H activation

Nature Communications, 2017
Functionalization of the multiple, similar, boron-hydrogen bonds in carboranes is difficult to achieve with selectivity. Here the authors report an iridium-catalysed borylation ofo-carboranes with high yields and regioselectivities.
Ruofei Cheng, Zaozao Qiu, Zuowei Xie
doaj   +1 more source

Fully Reversible Regulation of 8‐17 DNAzyme Activity Using Nucleoside‐Based Diarylethenes

Chemistry – A European Journal, EarlyView.
The site‐specific incorporation of nucleosidic diarylethenes into the 8–17 deoxyribozyme (DNAzyme) identified position 2.1 as optimal. Compound dU‐PhtBu enabled efficient light‐dependent control of catalytic activity, while maintaining thermal stability and reversibility.
Jörn Bargstedt, Simon M. Büllmann, Sophia Conwell, Andres Jäschke   +3 more
wiley   +1 more source

Spirobifluorene fusion in multiple resonance frameworks enables efficient pure‐red OLEDs with narrowband emission and suppressed efficiency roll‐off

FlexMat, EarlyView.
An orthogonal spirobifluorene‐fusion strategy is introduced for B/N/O‐alternated MR frameworks, enabling improved kRISC (5.46 × 103 s−1), high ΦPL (97%), and narrow‐band pure‐red emission. Vacuum‐evaporated OLEDs incorporating this emitter achieve an EQEmax >40% (FWHM = 36 nm) and exhibit exceptionally low efficiency roll‐off at high luminance ...
Yan‐Yun Jing, Han Wu, Xiaoling Xu, Sijie Xian, Jingsheng Miao, Xiaojun Yin, Chuluo Yang, Xiaosong Cao   +7 more
wiley   +1 more source

Quadruple C-H activation coupled to hydrofunctionalization and C-H silylation/borylation enabled by weakly coordinated palladium catalyst

Nature Communications, 2020
Combining the Heck reaction with other transformations provides a powerful strategy to access diverse, complex compounds. Here, the authors report a weak coordination dominated Pd(0)-catalyzed quadruple C-H activation followed by hydro-functionalization,
Bo-Cheng Tang, Wen-Xuan Lin, Xiang-Long Chen, Cai He, Jin-Tian Ma, Yan-Dong Wu, Yu Lan, An-Xin Wu   +7 more
doaj   +1 more source

Heteroatom location‐ and orientation mode‐dependent reverse intersystem crossing rate in multiple resonance emitters

FlexMat, EarlyView.
By constructing two pairs of isomers with different heteroatom anchoring positions, the relationship between heteroatom location and orientation mode and reverse intersystem crossing rate constant (kRISC) in multiple resonance (MR) emitters is systematically investigated.
Tingting Huang, Yincai Xu, Yupei Qu, Xinliang Cai, Jinbei Wei, Yue Wang   +5 more
wiley   +1 more source

Dearomative C2-borylation of indoles

Dalton Transactions
The dearomative functionalization of indoles to C2-borylated indolenium compounds is achieved under mild conditions by leveraging the high Lewis acidity of bis(1-methyl- ortho -carobranyl)borane.
Ayesha Begum, Manjur Oyasim Akram, Caleb Martin   +2 more
openaire   +2 more sources