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

Metal-Free Mesoporous SiO2 Nanorods as a Highly Efficient Catalyst for the Baeyer–Villiger Oxidation under Mild Conditions

2018 ◽  
Vol 6 (5) ◽  
pp. 5868-5876 ◽  
Author(s):  
Xueyao Zhang ◽  
Honglei Yang ◽  
Guangxue Yang ◽  
Shuwen Li ◽  
Xiang Wang ◽  
...  
Keyword(s):  
Efficient Catalyst ◽  
Metal Free ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Mesoporous Sio2 ◽  
Villiger Oxidation

A mild, general, and metal-free method for site-specific deuteration induced by visible light using D2O as the source of deuterium atoms

2020 ◽  
Vol 22 (3) ◽  
pp. 669-672 ◽  
Author(s):  
Shuai Shi ◽  
Ruining Li ◽  
Liangming Rao ◽  
Zhankui Sun
Keyword(s):  
Visible Light ◽  
Functional Group ◽  
Site Specific ◽  
Metal Free ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Radical Approach

Visible light induced desulfurization–deuteration method was developed using D2O as the source of deuterium atoms. This radical approach features mild conditions, broad substrate scope, highly efficient D-incorporation and excellent functional group compatibility.

Synthesis of Bisflavanol-Type Natural Products and Their Analogues­ via Self-Coupling of C8-Methylol Catechin Derivatives

Synthesis ◽  
2019 ◽  
Vol 51 (16) ◽  
pp. 3127-3141
Author(s):  
Deng-Ming Huang ◽  
Hui-Jing Li ◽  
Yan Zhao ◽  
Yan-Chao Wu
Keyword(s):  
Natural Products ◽  
Coupling Mechanism ◽  
The Novel ◽  
Efficient Synthesis ◽  
Metal Free ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Acid Catalyzed

A highly efficient and regioselective self-coupling of C8-methylol catechin derivatives is developed for the synthesis of dimeric flavanol analogues under metal-free and mild conditions. Its applicability is showcased by the efficient synthesis of bisflavanol-type natural products bis-8,8′-catechinylmethane, bis-8,8′-epicatechinylmethane, talienbisflavan A, and oolonghomobisflavan A. The novel self-coupling mechanism sheds new light on the classical Friedel–Crafts alkylation mechanism in acid-catalyzed catechin–formaldehyde condensation.

scholarly journals A fully diastereoselective oxidation of a mesoionic dipole with triplet molecular oxygen

2020 ◽  
Vol 18 (32) ◽  
pp. 6328-6339
Author(s):  
Juan García de la Concepción ◽  
Martín Ávalos ◽  
José L. Jiménez ◽  
Pedro Cintas ◽  
Mark E. Light
Keyword(s):  
Molecular Oxygen ◽  
Atmospheric Oxygen ◽  
Cascade Reaction ◽  
Metal Free ◽  
Free Oxidation

A metal-free oxidation of a mesoionic dipole with atmospheric oxygen triggers a complex cascade reaction through spin intercrossing, as supported by computation, and leading to polycycles with complete diastereoselection.

Oxidation of olefins using molecular oxygen catalyzed by a part per million level of recyclable copper catalyst under mild conditions

2017 ◽  
Vol 19 (3) ◽  
pp. 675-681 ◽  
Author(s):  
Guoqiang Yang ◽  
Huiyuan Du ◽  
Jia Liu ◽  
Zheng Zhou ◽  
Xingbang Hu ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Copper Catalyst ◽  
Catalyst Loading ◽  
Reaction Conditions ◽  
Mild Conditions ◽  
Oxidation Of Olefins

O2 as oxidant, ppm catalyst loading, mild reaction conditions, good selectivity, and excellent catalyst recyclability for the oxidation of olefins.

Allylic oxidation of olefins with a manganese-based metal–organic framework

2019 ◽  
Vol 21 (13) ◽  
pp. 3629-3636 ◽  
Author(s):  
Jingwen Chen ◽  
Minda Chen ◽  
Biying Zhang ◽  
Renfeng Nie ◽  
Ao Huang ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Aerobic Oxidation ◽  
Allylic Oxidation ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Oxidation Of Olefins ◽  
Metal Organic ◽  
Selective Aerobic Oxidation ◽  
Organic Framework

Manganese-based CPF-5 as a highly efficient catalyst for the selective aerobic oxidation of cyclohexene to cyclohexenone under mild conditions.

DMSO as oxidant and sulfenylating agent for metal-free oxidation and methylthiolation of alcohol-containing indoles

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 30389-30393 ◽  
Author(s):  
Jin-Feng Zou ◽  
Wei-Sheng Huang ◽  
Li Li ◽  
Zheng Xu ◽  
Zhan-Jiang Zheng ◽  
...  
Keyword(s):  
Dimethyl Sulfoxide ◽  
Sulfur Source ◽  
Metal Free ◽  
Mild Conditions ◽  
Free Oxidation

A new methylthiolation protocol was successfully established for the synthesis of substituted indoles bearing 3-methylthioether moiety, in which new C–S bond and C=O bond were formed using dimethyl sulfoxide as the sulfur source under mild conditions.

Boosting activity of molecular oxygen by pyridinium-based photocatalysts for metal-free alcohol oxidation

2021 ◽  
Vol 23 (3) ◽  
pp. 1337-1343
Author(s):  
Shuai Ma ◽  
Jing-Wang Cui ◽  
Cai-Hui Rao ◽  
Meng-Ze Jia ◽  
Yun-Rui Chen ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Molecular Oxygen ◽  
Noble Metal ◽  
Photocatalytic Oxidation ◽  
Alcohol Oxidation ◽  
Free Alcohol ◽  
Metal Free ◽  
Co Catalysts ◽  
Mild Conditions ◽  
Oxidation Of Alcohols

Pyridinium molecules are developed as electron- and energy-transfer mediators to boost the activity of air oxygen and thus achieve highly efficient photocatalytic oxidation of alcohols without any noble metal and additional co-catalysts/additives under mild conditions.

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