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.

Metal-free photocatalytic aerobic oxidation of biomass-based furfural derivatives to prepare γ-butyrolactone

2021 ◽  
Author(s):  
Rui Zhu ◽  
Gongyu Zhou ◽  
Jia-nan Teng ◽  
Wanying Liang ◽  
Xinglong Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Aerobic Oxidation ◽  
Metal Free ◽  
Mild Conditions ◽  
Photocatalytic System

A heterogeneous metal-free photocatalytic system was developed for photocatalytic aerobic oxidation of biomass-based furfural derivatives to prepare γ-butyrolactone under mild conditions (visible light, room temperature, no base, and O2 balloon).

Metal-free visible-light-induced aerobic oxidation of α-diazoesters leading to α-ketoesters in air

2021 ◽  
Author(s):  
Ruisheng Liu ◽  
Qishun Liu ◽  
Haoran Meng ◽  
Hongyu Ding ◽  
Jindong Hao ◽  
...  
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Aerobic Oxidation ◽  
Metal Free

A metal-free and visible-light-induced strategy has been established for the construction of α-ketoesters via aerobic oxidation of α-diazoesters with dioxygen in air at room temperature.

Metal-free phosphonation of heteroarene N-oxides with trialkyl phosphite at room temperature

2017 ◽  
Vol 15 (15) ◽  
pp. 3165-3169 ◽  
Author(s):  
Ming-Tao Chen ◽  
Xia You ◽  
Li-Gang Bai ◽  
Qun-Li Luo
Keyword(s):  
Room Temperature ◽  
Trialkyl Phosphite ◽  
Metal Free ◽  
Mild Conditions ◽  
Short Time

Heteroarene N-oxides were successfully converted to heteroarylphosphonates in a very short time under mild conditions through in situ activation with CBrCl3.

Modified Markó’s aerobic oxidation of alcohols under atmospheric pressure with air or molecular oxygen at room temperature

2012 ◽  
Vol 53 (44) ◽  
pp. 5880-5882 ◽  
Author(s):  
Takeshi Nishii ◽  
Tomomi Ouchi ◽  
Aya Matsuda ◽  
Yuka Matsubara ◽  
Yuuko Haraguchi ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Atmospheric Pressure ◽  
Room Temperature ◽  
Aerobic Oxidation ◽  
Oxidation Of Alcohols

Highly efficient and metal-free oxidation of olefins by molecular oxygen under mild conditions

Tetrahedron ◽  
2007 ◽  
Vol 63 (32) ◽  
pp. 7634-7639 ◽  
Author(s):  
Xinli Tong ◽  
Jie Xu ◽  
Hong Miao ◽  
Guanyu Yang ◽  
Hong Ma ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Metal Free ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Oxidation Of Olefins ◽  
Free Oxidation

scholarly journals Organophotoredox-Catalyzed Direct C-H Functionalization of “Drug Prejudice” at Room Temperature

2020 ◽  
Author(s):  
Narendra Chaubey ◽  
Anant Kapdi ◽  
Biswanath Maity
Keyword(s):  
Room Temperature ◽  
Bond Functionalization ◽  
First Report ◽  
Metal Free ◽  
Mild Conditions ◽  
The Past ◽  
Free Environment

<p>Organophotocatalytic C─H bond functionalization has attracted lot of attention in the past several years due to the possibility of catalysing reactions in a metal-free environment. Continuing on these lines, we repot herein an organophotoredox catalyzed C─H functionalization of imidazo[1,2-a]pyridines and related heterocycles with malonates under mild conditions providing excellent yields of the products at room temperature. Although, C─3 functionalization of imidazo[1,2-a]pyridines are known, this is the first report involving malonates as coupling partners leading to the synthesis of a range of functionalized products including Zolpidem, a sedative-hypnotic medicine. </p>

Ultrasound accelerated expedient and eco-friendly synthesis of aryl sulfonates using I2 as catalyst at ambient conditions

2021 ◽  
Vol 18 ◽  
Author(s):  
Sha Zhu ◽  
Bin-Bin Wang ◽  
Mei-Chen Tan ◽  
Xiaofu Qian ◽  
Shengneng Ying ◽  
...  
Keyword(s):  
Energy Saving ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Ambient Conditions ◽  
Metal Free ◽  
Mild Conditions ◽  
Efficient Construction ◽  
Ultrasound Assisted

: By using an energy-saving and eco-friendly approach for the efficient construction of aryl sulfonates through ultrasound-assisted coupling reaction of readily sodium sulfinates with N-hydroxyphthalimide was developed under metal-free and mild conditions within 10 min at room temperature.

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