scholarly journals Ruthenium Catalyzed β-Selective Alkylation of Vinylpyridines with Aldehydes/Ketones via N2H4 Mediated Deoxygenative Couplings

2021 ◽  
Author(s):  
Leiyang Lv ◽  
Chao-Jun Li
Keyword(s):  
Polarity Reversal ◽  
Electrophilic Reagents ◽  
Selective Alkylation

Umpolung (polarity reversal) tactics of aldehydes/ketones have greatly broadened the carbonyl chemistry by enabling transformations with electrophilic reagents and deoxygenative functionalizations. Herein, we reported the first ruthenium-catalyzed β-selective alkylation of...

The Influence of Polarity Reversal on Two-layered EPR and LDPE Simulating DC Cable Joints

2019 ◽  
Vol 139 (2) ◽  
pp. 78-84
Author(s):  
Tsuyoshi Tohmine ◽  
Kumiko Iguchi ◽  
Keita Sonoda ◽  
Hiroaki Miyake ◽  
Yasuhiro Tanaka ◽  
...  
Keyword(s):  
Polarity Reversal

Shape-Selective Alkylation of Toluene with Methanol over Modified Nano-scale HZSM-5 Zeolite

2014 ◽  
Vol 32 (7) ◽  
pp. 1280-1286 ◽  
Author(s):  
Zhiping ZHANG ◽  
Yan ZHAO ◽  
Hongyu WU ◽  
Wei TAN ◽  
Xiangsheng WANG ◽  
...  
Keyword(s):  
Nano Scale ◽  
Shape Selective ◽  
Selective Alkylation

Research Progress on Cross-coupling Reactions of Alkenylaluminum with Electrophilic Reagents

2018 ◽  
Vol 22 (15) ◽  
pp. 1523-1535 ◽  
Author(s):  
Qing Han Li ◽  
Xue Bei Shao ◽  
Yong Ding ◽  
Chang Wen ◽  
Zhi Gang Zhao
Keyword(s):  
Cross Coupling ◽  
Research Progress ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Electrophilic Reagents

scholarly journals Bromine Radical as a Visible-light-mediated Polarity-reversal Catalyst

iScience ◽  
2021 ◽  
pp. 102693
Author(s):  
Han Wang ◽  
Haiwang Liu ◽  
Mu Wang ◽  
Meirong Huang ◽  
Xiangcheng Shi ◽  
...  
Keyword(s):  
Visible Light ◽  
Polarity Reversal

Photocatalyzed Chemo‐Selective Alkylation of Quinones and Phenothiazinones with Alkyl Amides: Photophysical and Cytotoxic Activity Studies

2021 ◽  
Vol 6 (9) ◽  
pp. 2094-2100
Author(s):  
Pandaram Sakthivel ◽  
T. P. Adarsh Krishna ◽  
Andivelu Ilangovan
Keyword(s):  
Cytotoxic Activity ◽  
Selective Alkylation

scholarly journals Clarifications on the Behavior of Alternative Gases to SF6 in Divergent Electric Field Distributions under AC Voltage

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1065
Author(s):  
Houssem Eddine Nechmi ◽  
Michail Michelarakis ◽  
Abderrahmane (Manu) Haddad ◽  
Gordon Wilson
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Partial Discharge ◽  
Mean Value ◽  
Electrode System ◽  
Polarity Reversal ◽  
Buffer Gas ◽  
Co2 Gas ◽  
Breakdown Mechanism ◽  
Positive Cycle

Negative and positive partial discharge inception voltages and breakdown measurements are reported in a needle-plane electrode system as a function of pressure under AC voltage for natural gases (N2, CO2, and O2/CO2), pure NovecTM gases (C4F7N and C5F10O) and NovecTM in different natural gas admixtures. For compressed 4% C4F7N–96% CO2 and 6% C5F10O–12% O2–82% CO2 gas mixtures, the positive-streamer mode is identified as the breakdown mechanism. Breakdown and negative partial discharge inception voltages of 6% C5F10O–12% O2–82% CO2 are higher than those of 4% C4F7N–96% CO2. At 8.8 bar abs, the breakdown voltage of 6% C5F10O–12% O2–82% CO2 is equal to that of 12.77% O2–87.23% CO2 (buffer gas). Synergism in negative partial discharge inception voltage/electric field fits with the mean value and the sum of each partial pressure individually component for a 20% C4F7N–80% CO2 and 6% C5F10O–12% O2–82% CO2, respectively. In 9% C4F7N–91% CO2, the comparison of partial discharge inception electric fields is Emax (CO2) = Emax(C4F7N), and Emax (12.77% O2–87.23% CO2) = Emax(C5F10O) in 19% C5F10O–81%(12.77% O2–87.23% CO2). Polarity reversal occurs under AC voltage when the breakdown polarity changes from negative to positive cycle. Polarity reversal electric field EPR was quantified. Fitting results show that EPR (CO2) = EPR(9% C4F7N–91% CO2) and EPR(SF6) = EPR (22% C4F7N–78% CO2). EPR (4% C4F7N–96% CO2) = EPR (12.77% O2–87.23% CO2) and EPR (6% C5F10O–12% O2–82% CO2) < EPR (4% C4F7N–96% CO2) < EPR (CO2).

Energy-efficient polarity reversal of a target skyrmion driven by spin-transfer effect

2021 ◽  
Vol 528 ◽  
pp. 167705
Author(s):  
Lan Bo ◽  
Lingwen Kong ◽  
Rongzhi Zhao ◽  
Chenglong Hu ◽  
Lianze Ji ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Transfer Effect ◽  
Spin Transfer ◽  
Polarity Reversal

ChemInform Abstract: REACTIONS OF 2,4,6-TRIARYLDIHYDRO-1,3,5-DITHIAZINES WITH ELECTROPHILIC REAGENTS

1984 ◽  
Vol 15 (20) ◽  
Author(s):  
Y. TAKIKAWA ◽  
K. SHIMADA ◽  
T. MAKABE ◽  
S. TAKIZAWA
Keyword(s):  
Electrophilic Reagents

Ketalised 3,4-dihydroxybutyllithiums: New intermediates to transfer four-carbon diol functionality to electrophilic reagents

Tetrahedron ◽  
1996 ◽  
Vol 52 (24) ◽  
pp. 8333-8340 ◽  
Author(s):  
Fernando F. Huerta ◽  
Cecilia Gómez ◽  
Miguel Yus
Keyword(s):  
Electrophilic Reagents
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