Aerobic oxidative esterification and thioesterification of aldehydes using dibromoisocyanuric acid under mild conditions: no metal catalysts required

2018 ◽  
Vol 42 (13) ◽  
pp. 10833-10841 ◽  
Author(s):  
Young-Do Kwon ◽  
Minh Thanh La ◽  
Hee-Kwon Kim
Keyword(s):  
Metal Catalysts ◽  
Oxidative Esterification ◽  
Mild Conditions ◽  
Dibromoisocyanuric Acid

Esters and thioesters were successfully prepared through oxidative esterification and thioesterification of corresponding aldehydes in the presence of dibromoisocyanuric acid.

Synergetic Bimetallic Oxidative Esterification of 5-Hydroxymethylfurfural under Mild Conditions

2019 ◽  
Author(s):  
Abel Salazar ◽  
Paul Hünemörder ◽  
Jabor Rabeah ◽  
Antje Quade ◽  
Rajenahally V. Jagadeesh ◽  
...  
Keyword(s):  
Oxidative Esterification ◽  
Mild Conditions

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.

C–H bond sulfonylation of anilines with the insertion of sulfur dioxide under metal-free conditions

2018 ◽  
Vol 54 (54) ◽  
pp. 7459-7462 ◽  
Author(s):  
Kaida Zhou ◽  
Jun Zhang ◽  
Lifang Lai ◽  
Jiang Cheng ◽  
Jiangtao Sun ◽  
...  
Keyword(s):  
Sulfur Dioxide ◽  
Metal Catalysts ◽  
Metal Free ◽  
Mild Conditions ◽  
Three Component Reaction

2-Sulfonylanilines are generated in moderate to good yields through a three-component reaction of anilines, DABCO·(SO2)2, and aryldiazonium tetrafluoroborates under mild conditions. No metal catalysts or additives are needed for this transformation.

scholarly journals Metal-free selective mono-halodecarboxylation of heteroarenes under mild conditions

2018 ◽  
Vol 5 (6) ◽  
pp. 180333 ◽  
Author(s):  
Scott H. Henderson ◽  
Ryan A. West ◽  
Simon E. Ward ◽  
Mark A. Honey
Keyword(s):  
Carboxylic Acids ◽  
Toxic Metal ◽  
Metal Catalysts ◽  
Metal Free ◽  
Mild Conditions ◽  
Simple Protocol ◽  
Convenient Route

The halodecarboxylation of heteroarene carboxylic acids by treatment with N -bromosuccinimide or N -chlorosuccinimide was performed. This procedure provides a convenient route to synthetically useful mono-halogenated heteroarene intermediates such as halo-indoles, -aza-indoles, -indazoles and -aza-indazoles. The mild conditions employed and simple protocol provides an advantage over traditional halodecarboxylation procedures that require expensive and toxic metal catalysts, basic conditions, time-consuming intermediate isolation and elevated reaction temperatures.

scholarly journals Co-N-Si/AC Catalyst for Aerobic Oxidation of Benzyl Alcohols to Esters under Mild Conditions

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6792
Author(s):  
Changjian Zhou ◽  
Rong Sun ◽  
Yuting Zhang ◽  
Biao Xiong ◽  
Hui Dai ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Active Sites ◽  
Aerobic Oxidation ◽  
Significant Loss ◽  
Ambient Conditions ◽  
Benzyl Alcohols ◽  
Oxidative Esterification ◽  
Product Yields ◽  
Mild Conditions ◽  
Earth Abundant

A stable, earth-abundant, reusable cobalt-based heterogeneous catalyst is developed for the oxidative esterification of alcohols under ambient conditions, featuring broad substrate scope, providing good to excellent product yields. This protocol enables easy recyclability of the catalyst, measured up to five times without significant loss of efficiency. The active sites of Co-N-Si/AC are proposed to be Co-N species.

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