Methane activation by metal-free Lewis acid centers only – a computational design and mechanism study

2016 ◽  
Vol 18 (16) ◽  
pp. 11539-11549 ◽  
Author(s):  
Gongli Ma ◽  
Zhen Hua Li
Keyword(s):  
Lewis Acid ◽  
Computational Design ◽  
Design Strategy ◽  
Methane Activation ◽  
Mechanism Study ◽  
Metal Free ◽  
Acid Centers

The design strategy and mechanism of methane activation by metal-free Lewis acidic silylboranes is investigated.

Minimalistic Design Approach for Multi-Reactivity against Free Radicals and Metal-Free and Metal-Bound Amyloid-β Peptides: Redox-Based Substitutions of Benzene

2019 ◽  
Author(s):  
Mingeun Kim ◽  
Juhye Kang ◽  
Misun Lee ◽  
Jiyeon Han ◽  
Geewoo Nam ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Free Radicals ◽  
Amyloid Β ◽  
Design Strategy ◽  
Design Approach ◽  
Metal Free

We report a minimalistic redox-based design strategy for engineering compact molecules based on the simplest aromatic framework, benzene, with multi-reactivity against free radicals, metal-free amyloid-β, and metal-bound amyloid-β, implicated in the most common form of dementia, Alzheimer’s disease.

scholarly journals Metal-Free Catalysts for the Polymerization of Alkynyl-Based Monomers

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 1 ◽  
Author(s):  
Jie Zhang ◽  
Zhiming Zhang ◽  
Fulin Yang ◽  
Haoke Zhang ◽  
Jingzhi Sun ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Research Focus ◽  
Catalytic Systems ◽  
Metal Free ◽  
Catalyst Free ◽  
Material Sciences ◽  
Acid Catalyzed

Novel polymerizations based on alkyne monomers are becoming a powerful tool to construct polymers with unique structures and advanced functions in the areas of polymer and material sciences, and scientists have been attracted to develop a variety of novel polymerizations in recent decades. Therein, catalytic systems play an indispensable role in the influence of polymerization efficiencies and the performances of the resultant polymers. Concerning the shortcomings of metallic catalysts, much of the recent research focus has been on metal-free polymerization systems. In this paper, metal-free catalysts are classified and the corresponding polymerizations are reviewed, including organobase-catalyzed polymerizations, Lewis-acid-catalyzed polymerizations, as well as catalyst-free polymerizations. Moreover, the challenges and perspectives in this area are also briefly discussed.

Synthesis ofC2-Symmetric Bisamidines:  A New Type of Chiral Metal-Free Lewis Acid Analogue Interacting with Carbonyl Groups

2007 ◽  
Vol 72 (15) ◽  
pp. 5618-5624 ◽  
Author(s):  
Deniz Akalay ◽  
Gerd Dürner ◽  
Jan W. Bats ◽  
Michael Bolte ◽  
Michael W. Göbel
Keyword(s):  
Lewis Acid ◽  
Carbonyl Groups ◽  
Metal Free ◽  
Acid Analogue ◽  
New Type

Development of silica-supported frustrated Lewis pairs: highly active transition metal-free catalysts for the Z-selective reduction of alkynes

2016 ◽  
Vol 6 (3) ◽  
pp. 882-889 ◽  
Author(s):  
Kai C. Szeto ◽  
Wissam Sahyoun ◽  
Nicolas Merle ◽  
Jessica Llop Castelbou ◽  
Nicolas Popoff ◽  
...  
Keyword(s):  
Transition Metal ◽  
Lewis Acid ◽  
Selective Reduction ◽  
Frustrated Lewis Pairs ◽  
Acid Base ◽  
Metal Free ◽  
Highly Active ◽  
Active Transition ◽  
Lewis Pairs

Supported Lewis acid/base systems based have been prepared and characterized.

ENDOR study of anthraquinone paramagnetic complexes with Lewis acid centers of aluminium oxide

1991 ◽  
Vol 2 (4) ◽  
pp. 675-681 ◽  
Author(s):  
E. V. Lunina ◽  
G. L. Markaryan ◽  
A. V. Fionov ◽  
A. V. Astashkin ◽  
R. I. Samoilova ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Aluminium Oxide ◽  
Acid Centers ◽  
Paramagnetic Complexes

Novel Naproxen Derivatives: Lewis Acid/Transition-metal Free Synthesis via C-C Bond Forming Reaction

2007 ◽  
Vol 4 (4) ◽  
pp. 292-295 ◽  
Author(s):  
Sarbani Pal ◽  
P. Bindu ◽  
Pragnyadhar Reddy Venna ◽  
P. K. Dubey
Keyword(s):  
Transition Metal ◽  
Lewis Acid ◽  
Metal Free ◽  
Bond Forming

An Unprecedented, Lewis Acid-Mediated, Metal-Free Iodoannulation Strategy to Aromatic Iodides

2018 ◽  
Vol 13 (23) ◽  
pp. 3676-3680
Author(s):  
Trisha Banik ◽  
Vipul V. Betkekar ◽  
Krishna P. Kaliappan
Keyword(s):  
Lewis Acid ◽  
Metal Free
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