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.

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.

Transition-metal-free direct perfluoroalkylation of quinoline amides at C5 position through radical cross-coupling under mild conditions

2017 ◽  
Vol 4 (6) ◽  
pp. 1116-1120 ◽  
Author(s):  
Jun Xu ◽  
Li Qiao ◽  
Beibei Ying ◽  
Xiaolei Zhu ◽  
Chao Shen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Efficient Method ◽  
Cross Coupling ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Low Energy ◽  
Metal Free ◽  
Mild Conditions

A simple low-energy and efficient method is established for the synthesis of C5-selective perfluoroalkylation quinolines in the absence of any transition metal catalysts.

Electrochemically promoted synthesis of polysubstituted oxazoles from β-diketone derivatives and benzylamines under mild conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (46) ◽  
pp. 24300-24303 ◽  
Author(s):  
Gaoqing Yuan ◽  
Zechen Zhu ◽  
Xiaofang Gao ◽  
Huanfeng Jiang
Keyword(s):  
Transition Metal ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Mild Conditions

An efficient electrochemical route has been developed to synthesize polysubstituted oxazoles, without the use of hazardous oxidants and transition metal catalysts.

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.

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.

Transition-Metal-Free Aerobic Oxidative Cross-Coupling of Indoles with Arylidenemalononitriles

Synlett ◽  
2019 ◽  
Vol 31 (02) ◽  
pp. 194-198
Author(s):  
Aizhen Yang ◽  
Zheng Li
Keyword(s):  
Transition Metal ◽  
Efficient Method ◽  
Cross Coupling ◽  
Transition Metal Catalysts ◽  
High Yield ◽  
Atom Economy ◽  
Direct Construction ◽  
Organometallic Reagents ◽  
Metal Free ◽  
Mild Conditions

An efficient method for the direct construction of C(sp2)–C(sp2) bonds by aerobic oxidative cross-coupling of indoles with arylidenemalononitriles is described. Various [aryl(1H-indol-3-yl)methylene]malononitriles were efficiently synthesized by using air as an oxidant under mild conditions. The salient features for this protocol are no transition-metal catalysts, no organometallic reagents, high atom economy, high yield, mild conditions, and simple workup procedures.

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