Metal-free molecular iodine-catalyzed direct sulfonylation of pyrazolones with sodium sulfinates leading to sulfonated pyrazoles at room temperature

2017 ◽  
Vol 4 (1) ◽  
pp. 26-30 ◽  
Author(s):  
Wei Wei ◽  
Huanhuan Cui ◽  
Daoshan Yang ◽  
Xiaoxia Liu ◽  
Chenglong He ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Iodine ◽  
Metal Free ◽  
Highly Efficient

A simple and highly efficient iodine-catalyzed sulfonylation of pyrazolones with sodium sulfinates has been developed under mild and metal-free conditions.

scholarly journals Highly Efficient Synthesis of Hindered 3-Azoindoles via Metal-Free C–H Functionalization of Indoles

Synthesis ◽  
2020 ◽  
Vol 52 (04) ◽  
pp. 574-580
Author(s):  
Nicolas Jacob ◽  
Lucas Guillemard ◽  
Joanna Wencel-Delord
Keyword(s):  
Steric Hindrance ◽  
Room Temperature ◽  
Efficient Synthesis ◽  
Atom Economy ◽  
Photochromic Compounds ◽  
Metal Free ◽  
Highly Efficient ◽  
Simple Protocol ◽  
Potential Applications

Although 3-azoindoles have recently emerged as an appealing family of photoswitch molecules, the synthesis of such compounds has been poorly covered in the literature. Herein a high-yielding and operationally simple protocol is reported allowing the synthesis of 3-azoindoles, featuring important steric hindrance around the azo motif. Remarkably, this C–H coupling is characterized by excellent atom economy and occurs under metal-free conditions, at room temperature, and within few minutes, delivering the expected products in excellent yields (quantitatively in most of the cases). Accordingly, a library of new molecules, with potential applications as photochromic compounds, is prepared.

Graphite oxide: a metal free highly efficient carbocatalyst for the synthesis of 1,5-benzodiazepines under room temperature and solvent free heating conditions

2017 ◽  
Vol 19 (6) ◽  
pp. 1576-1585 ◽  
Author(s):  
Ramen Jamatia ◽  
Ajay Gupta ◽  
Binoyargha Dam ◽  
Mithu Saha ◽  
Amarta Kumar Pal
Keyword(s):  
Graphite Oxide ◽  
Room Temperature ◽  
Solvent Free ◽  
Metal Free ◽  
Highly Efficient

We report a sustainable and metal free carbocatalyst, graphite oxide, for the synthesis of 1,5-benzodiazepines under room temperature and solvent free heating conditions.

A Novel Metal-free and Highly Efficient Hydroarylation of Styrenes Catalyzed by Molecular Iodine

2008 ◽  
Vol 26 (2) ◽  
pp. 321-327 ◽  
Author(s):  
Gao-Jun SUN ◽  
Tai-Chang ZHANG ◽  
Liu-Si SHENG ◽  
Fei QI ◽  
Zhi-Yong WANG
Keyword(s):  
Molecular Iodine ◽  
Metal Free ◽  
Highly Efficient

scholarly journals Highly Efficient Recyclable Sol Gel Polymer Catalyzed One Pot Difunctionalization of Alkynes

Molecules ◽  
2018 ◽  
Vol 23 (8) ◽  
pp. 1879
Author(s):  
Justin Domena ◽  
Carlos Chong ◽  
Qiaxian Johnson ◽  
Bhanu Chauhan ◽  
Yalan Xing
Keyword(s):  
Reaction Time ◽  
Room Temperature ◽  
Functional Group ◽  
Sol Gel ◽  
One Pot ◽  
Short Reaction Time ◽  
Metal Free ◽  
Highly Efficient

Amino-bridged gel polymer P1 was discovered to catalyze alkyne halo-functionalization in excellent yields, regioselectivity, functional group compatibility, and recyclability. We have observed that both aromatic and aliphatic alkynes can be converted to α,α-dihalogenated ketones in the presence of polymer P1 under metal-free conditions at room temperature within a short reaction time.

Green Aerobic Oxidation of Thiols to Disulfides by Flavin–Iodine Coupled Organocatalysis

Synlett ◽  
2021 ◽  
Author(s):  
Marina Oka ◽  
Ryo Kozako ◽  
Hiroki Iida
Keyword(s):  
Molecular Oxygen ◽  
Room Temperature ◽  
Aerobic Oxidation ◽  
Molecular Iodine ◽  
Metal Free ◽  
Mild Conditions

A coupled catalysis was performed using a riboflavin-derived organocatalyst and molecular iodine, which successfully promoted the aerobic oxidation of thiols to disulfides under metal-free mild conditions. The activation of molecular oxygen occurred smoothly at room temperature through the transfer of electrons from the iodine catalysis to the biomimetic flavin catalysis, which formed the basis of the green oxidative synthesis of disulfides from thiols.

Imidazole based dual photo/thermal initiators for highly efficient radical polymerization under air with metal-free approach

2021 ◽  
Author(s):  
Jacques Lalevée ◽  
Qiang Ma ◽  
Shaohui Liu ◽  
Marie Le Dot ◽  
haifaa Mokbel ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Radical Polymerization ◽  
Spatial Resolution ◽  
Mild Condition ◽  
Room Temperature ◽  
Inert Atmosphere ◽  
Charge Transfer Complexes ◽  
Metal Free ◽  
Highly Efficient

By virtue of remarkable spatial resolution, a metal-free visible LEDs photopolymerization process, initiated by imidazole based charge transfer complexes at mild condition (room temperature, without inert atmosphere, monomer purification or...

Sulfonamide formation from sodium sulfinates and amines or ammonia under metal-free conditions at ambient temperature

2015 ◽  
Vol 17 (3) ◽  
pp. 1395-1399 ◽  
Author(s):  
Kai Yang ◽  
Miaolin Ke ◽  
Yuanguang Lin ◽  
Qiuling Song
Keyword(s):  
Ambient Temperature ◽  
Efficient Method ◽  
Room Temperature ◽  
Metal Base ◽  
Metal Free ◽  
Highly Efficient ◽  
Reaction Proceeds

A practical and highly efficient method for the construction of a variety of sulfonamides mediated by I2 was demonstrated. The reaction proceeds readily at room temperature using a variety of sodium sulfinates and amines or ammonia in water in a metal-, base-, ligand-, or additive-free protocol. Primary, secondary and tertiary sulfonamides were obtained in good to excellent yields with a broad range of substrate tolerability.

ChemInform Abstract: A Novel Metal-Free and Highly Efficient Hydroarylation of Styrenes Catalyzed by Molecular Iodine.

ChemInform ◽  
2008 ◽  
Vol 39 (24) ◽  
Author(s):  
Gao-Jun Sun ◽  
Tai-Chang Zhang ◽  
Liu-Si Sheng ◽  
Fei Qi ◽  
Zhi-Yong Wang
Keyword(s):  
Molecular Iodine ◽  
Metal Free ◽  
Highly Efficient
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