scholarly journals Development of Novel and Highly Efficient Methods to Construct Carbon–Carbon Bonds Using Group 7 Transition-Metal Catalysts

2012 ◽  
Vol 85 (6) ◽  
pp. 656-671 ◽  
Author(s):  
Yoichiro Kuninobu ◽  
Kazuhiko Takai
Keyword(s):  
Transition Metal ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Highly Efficient ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds

Eco-friendly electrocatalytic oxidation of alcohols on a novel electro generated TEMPO-functionalized MCM-41 modified electrode

2015 ◽  
Vol 17 (2) ◽  
pp. 991-1000 ◽  
Author(s):  
Babak Karimi ◽  
Mohammad Rafiee ◽  
Saber Alizadeh ◽  
Hojatollah Vali
Keyword(s):  
Transition Metal ◽  
Selective Oxidation ◽  
Modified Electrode ◽  
Electrocatalytic Oxidation ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Free System ◽  
Highly Efficient ◽  
Oxidation Of Alcohols ◽  
Mcm 41

The development of a highly efficient and waste-free system for the selective oxidation of alcohols without using expensive transition metal catalysts using a novel electrogenerated TEMPO-functionalized MCM-41 modified electrode is described.

Iodine-mediated synthesis of (E)-vinyl sulfones from sodium sulfinates and cinnamic acids in aqueous medium

RSC Advances ◽  
2015 ◽  
Vol 5 (82) ◽  
pp. 66723-66726 ◽  
Author(s):  
Jian Gao ◽  
Junyi Lai ◽  
Gaoqing Yuan
Keyword(s):  
Transition Metal ◽  
Aqueous Medium ◽  
Efficient Method ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Cinnamic Acids ◽  
Highly Efficient

A green and highly efficient method for the synthesis of (E)-vinyl sulfones promoted by iodine in water has been developed, without transition metal catalysts and ligands.

Synthesis of spiroketals by iridium-catalyzed double hydroalkoxylation

2006 ◽  
Vol 78 (2) ◽  
pp. 385-390 ◽  
Author(s):  
Barbara A. Messerle ◽  
Khuong Q. Vuong
Keyword(s):  
Transition Metal ◽  
Benzyl Alcohol ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Iridium Complex ◽  
Effective Catalyst ◽  
Efficient Approach ◽  
Highly Efficient

A highly efficient approach to the synthesis of spiroketals involves the double cyclization of alkynyl diols using transition-metal catalysts. The iridium complex [Ir(PyP)(CO)2]BPh4 where PyP = 1-[(2-diphenylphosphino)ethyl]pyrazole is an effective catalyst for promoting the formation of spiroketals via this double hydroalkoxylation reaction. The complex promotes the formation of a series of spiroketal products from alkynyl diol starting materials such as 3-ethynylpentane-1,5-diol and 2-(4-hydroxybut-1-ynyl)benzyl alcohol. Stereoselective cyclization occurs for 3-ethynylpentane-1,5-diol, 3-ethynylhexane-1,6-diol. The cycloadditions occur in all but one case with quantitative conversion in under 24 h at 120 °C.

scholarly journals TBHP-mediated highly efficient dehydrogenative cross-oxidative coupling of methylarenes with acetanilides

2016 ◽  
Vol 12 ◽  
pp. 2250-2255 ◽  
Author(s):  
Cui Chen ◽  
Weibing Liu ◽  
Peng Zhou
Keyword(s):  
Transition Metal ◽  
Organic Solvents ◽  
Oxidative Coupling ◽  
Cross Coupling ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Coupling Method ◽  
Highly Efficient ◽  
Coupling Approach

A TBHP-mediated dehydrogenative cross-oxidative-coupling approach has been developed for the synthesis of N-arylbenzamides from methylarenes and acetanilides. This cross-coupling method is free of transition metal catalysts and ligands, and no extra organic solvents are required, which make it an useful and attractive strategy for the straightforward construction of C–N bonds. Besides, this conversion is an important complement to the conventional C–N forming strategies.

Iodine-induced synthesis of sulfonate esters from sodium sulfinates and phenols under mild conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (35) ◽  
pp. 27439-27442 ◽  
Author(s):  
Jian Gao ◽  
Xiaojun Pan ◽  
Juan Liu ◽  
Junyi Lai ◽  
Liming Chang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Efficient Method ◽  
Room Temperature ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Mild Conditions ◽  
Highly Efficient

A facile and highly efficient method for the synthesis of sulfonate esters mediated by iodine at room temperature has been developed, without transition metal catalysts and oxidants.

Sulfur-Mediated Reactions through Sulfonium Salts and Ylides

Synlett ◽  
2021 ◽  
Author(s):  
Pingfan Li
Keyword(s):  
Transition Metal ◽  
Rational Design ◽  
Acid Catalysis ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Bronsted Acid ◽  
Proof Of Concept ◽  
Sulfonium Salts ◽  
Brönsted Acid ◽  
Sulfonium Ylides

AbstractThis Account discusses several new reaction methods developed in our group that utilize sulfur-mediated reactions through sulfonium salts and ylides, highlighting the interplay of rational design and serendipity. Our initial goal was to convert aliphatic C–H bonds into C–C bonds site-selectively, and without the use of transition-metal catalysts. While a proof-of-concept has been achieved, this target is far from being ideally realized. The unexpected discovery of an anti-Markovnikov rearrangement and subsequent studies on difunctionalization of alkynes were much more straightforward, and eventually led to the new possibility of asymmetric N–H insertion of sulfonium ylides through Brønsted acid catalysis.1 Introduction2 Allylic/Propargylic C–H Functionalization3 Anti-Markovnikov Rearrangement4 Difunctionalization of Alkynes5 Asymmetric N–H Insertion of Sulfonium Ylides6 Conclusion

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