Transition metal-free domino sequential synthesis of (E)-stilbenes, biaryl methanes and biaryl ethers using Et2AlCl as a Lewis acid

RSC Advances ◽  
2013 ◽  
Vol 3 (41) ◽  
pp. 18755 ◽  
Author(s):  
Satinath Sarkar ◽  
Manoranjan Jana ◽  
Narender Tadigoppula
Keyword(s):  
Transition Metal ◽  
Lewis Acid ◽  
Metal Free

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.

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

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

ChemInform ◽  
2007 ◽  
Vol 38 (51) ◽  
Author(s):  
Sarbani Pal ◽  
P. Bindu ◽  
Pragnyadhar Reddy Venna ◽  
P. K. Dubey
Keyword(s):  
Transition Metal ◽  
Lewis Acid ◽  
Metal Free ◽  
Bond Forming

Synthesis and Applications of Chiral Bicyclic Bisborane Catalysts

Synthesis ◽  
2021 ◽  
Author(s):  
Zhao-Ying Yang ◽  
Ming Zhang ◽  
Xiao-Chen Wang
Keyword(s):  
Transition Metal ◽  
Lewis Acid ◽  
Asymmetric Hydrogenation ◽  
Acid Catalysts ◽  
Frustrated Lewis Pairs ◽  
Lewis Acid Catalysts ◽  
Lewis Bases ◽  
Metal Free ◽  
Hydrogenation Reactions ◽  
Acid Catalyzed

The development of chiral borane Lewis acid catalysts opened the door for transition-metal-free catalyzed asymmetric organic reactions. Herein, we have summarized our work on the preparation of two classes of novel chiral bicyclic bisborane Lewis acid catalysts derived from C2-symmetric [3.3.0] dienes and [4.4] dienes, respectively. These catalysts not only form frustrated Lewis pairs with Lewis bases to catalyze asymmetric hydrogenation reactions but also activate Lewis basic functional groups in traditional Lewis acid catalyzed asymmetric reactions.

Lewis acid-catalyzed 2-arylquinazoline formation from N′-arylbenzimidamides and paraformaldehyde

2016 ◽  
Vol 18 (21) ◽  
pp. 5773-5776 ◽  
Author(s):  
Xiufang Cheng ◽  
Huamin Wang ◽  
Fuhong Xiao ◽  
Guo-Jun Deng
Keyword(s):  
Transition Metal ◽  
Lewis Acid ◽  
Efficient Procedure ◽  
Metal Free ◽  
Acid Catalyzed

An efficient procedure for the synthesis of 2-arylquinazolines from N′-arylbenzimidamides has been developed under transition-metal-free conditions.

scholarly journals Atom-Efficient Transition-Metal-Free Arylation of N,O-Acetals Using Diarylzinc Reagents through Zn/Zn Cooperativity

2021 ◽  
Author(s):  
Andryj M Borys ◽  
Jose Gil-Negrete ◽  
Eva Hevia
Keyword(s):  
Transition Metal ◽  
Lewis Acid ◽  
Reaction Conditions ◽  
Cooperative Action ◽  
Metal Free

Exploiting the cooperative action of Lewis acid Zn(C6F5)2 with diarylzinc reagents, the efficent arylation of N,O-acetals to access diarylmethylamines is reported. Reactions take place under mild reaction conditions without the...

Transition-metal-free catalytic hydroboration reduction of amides to amines

2020 ◽  
Vol 7 (21) ◽  
pp. 3515-3520
Author(s):  
Wubing Yao ◽  
Jiali Wang ◽  
Aiguo Zhong ◽  
Shiliang Wang ◽  
Yinlin Shao
Keyword(s):  
Transition Metal ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Value Added ◽  
Metal Free

The selective catalytic reduction of amides to value-added amine products is a desirable but challenging transformation.

Deaminative carbonylative thioesterification of activated alkylamines with thiophenols under transition-metal-free conditions

2021 ◽  
Author(s):  
Fengqian Zhao ◽  
Xiao-Feng Wu
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Metal Free

A transition-metal-free radical carbonylation of activated alkylamines with thiophenols has been successfully developed. Various thioesters were selectively produced with moderate to good yields.

Regioselective C3-H Trifluoromethylation of 2H-Indazole Under Transition-Metal-Free Photoredox Catalysis

2019 ◽  
Author(s):  
Arumugavel Murugan ◽  
Venkata Nagarjuna Babu ◽  
Nagaraj Sabarinathan ◽  
Sharada Duddu. S
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Practical Approach ◽  
Hypervalent Iodine ◽  
Radical Mechanism ◽  
Photoredox Catalysis ◽  
Metal Free

Here we report a visible-light-promoted metal-free regioselective C3-H trifluoromehtylation reaction that proceeds via radical mechanism and which supported by control experiments. The combination of photoredox catalysis and hypervalent iodine reagent provides a practical approach for the present trifluoromethylation reaction and synthesis of a library of trifluoromethylated indazoles.

Selective Oxidation of Alcohols Catalyzed by a Transition Metal-Free System of NHPI/DDQ/NaNO2

2011 ◽  
Vol 32 (1) ◽  
pp. 118-122 ◽  
Author(s):  
Lipeng ZHOU ◽  
Chaofeng ZHANG ◽  
Tao FANG ◽  
Bingbing ZHANG ◽  
Ying WANG ◽  
...  
Keyword(s):  
Transition Metal ◽  
Selective Oxidation ◽  
Free System ◽  
Metal Free ◽  
Oxidation Of Alcohols
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