Fixation of sulfur dioxide into small molecules

2015 ◽  
Vol 13 (6) ◽  
pp. 1592-1599 ◽  
Author(s):  
Gang Liu ◽  
Congbin Fan ◽  
Jie Wu
Keyword(s):  
Sulfur Dioxide ◽  
Transition Metal ◽  
Small Molecules ◽  
Transition Metal Catalysis ◽  
Metal Catalysis ◽  
Radical Process ◽  
Metal Free ◽  
Recent Advances

Recent advances in the insertion of sulfur dioxide under transition metal catalysis or metal-free conditions via a radical process are presented.

Recent advances in the sulfonylation of C–H bonds with the insertion of sulfur dioxide

2018 ◽  
Vol 54 (89) ◽  
pp. 12561-12569 ◽  
Author(s):  
Guanyinsheng Qiu ◽  
Kaida Zhou ◽  
Jie Wu
Keyword(s):  
Sulfur Dioxide ◽  
Transition Metal ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Transition Metal Catalysis ◽  
Light Irradiation ◽  
Metal Catalysis ◽  
Radical Process ◽  
Recent Advances

Recent advances in the sulfonylation of C–H bonds with the insertion of sulfur dioxide are summarized. C–H bond sulfonylation under transition metal catalysis or through a radical process has been developed. In some cases, the sulfonylation can be performed under catalyst- and additive-free conditions, or can be facilitated by visible light irradiation. The efficiency is also studied by merging the radical process and metal catalysis.

Recent advances in sulfonylation reactions using potassium/sodium metabisulfite

2020 ◽  
Vol 56 (30) ◽  
pp. 4145-4155 ◽  
Author(s):  
Shengqing Ye ◽  
Min Yang ◽  
Jie Wu
Keyword(s):  
Sulfur Dioxide ◽  
Transition Metal ◽  
Transition Metal Catalysis ◽  
Sodium Metabisulfite ◽  
Metal Catalysis ◽  
Potassium Sodium ◽  
Mild Conditions ◽  
Recent Advances ◽  
Radical Processes

Recently, sulfonylation reactions using potassium/sodium metabisulfite as the sulfur dioxide surrogate have been developed rapidly. In most cases, the transformations go through radical processes with the insertion of sulfur dioxide under mild conditions. Additionally, transition metal catalysis is applied in the reactions for the synthesis of sulfonyl-containing compounds.

Insertion Reaction of 2-Halo-N-allylanilines with K2S Involving Trisulfur Radical Anion: Synthesis of Benzothiazole Derivatives under Transition-Metal-Free Conditions

Synthesis ◽  
2020 ◽  
Author(s):  
Yan-Wei Zhao ◽  
Shun-Yi Wang ◽  
Xin-Yu Liu ◽  
Tian Jiang ◽  
Weidong Rao
Keyword(s):  
Transition Metal ◽  
Radical Anion ◽  
Radical Cyclization ◽  
Transition Metal Catalysis ◽  
Insertion Reaction ◽  
Metal Catalysis ◽  
Metal Free ◽  
Benzothiazole Derivatives

AbstractA synthesis of benzothiazole derivatives through the reaction of 2-halo-N-allylanilines with K2S in DMF is developed. The trisulfur radical anion S3·–, which is generated in situ from K2S in DMF, initiates the reaction without transition-metal catalysis or other additives. In addition, two C–S bonds are formed and heteroaromatization of benzothiazole is triggered by radical cyclization and H-shift.

Metal-Free Catalytic Aromatic C–H Borylation

Synlett ◽  
2020 ◽  
Vol 31 (19) ◽  
pp. 1857-1861
Author(s):  
Hua Zhang ◽  
Li Wang
Keyword(s):  
Transition Metal ◽  
Recent Progress ◽  
Rapid Development ◽  
Transition Metal Catalysis ◽  
Mechanistic Studies ◽  
Metal Catalysis ◽  
Promising Alternative ◽  
Metal Free ◽  
History Of ◽  
Near Future

In recent decades, C–H borylation has undergone rapid development and has become one of the most important and efficient methods for the synthesis of organoboron compounds. Although transition-metal catalysis dominates C–H borylation, the metal-free approach has emerged as a promising alternative strategy. This article briefly summarizes the history of metal-free aromatic C–H borylation, including early reports on electrophilic C–H borylation and recent progress in metal-free catalytic intermolecular C–H borylation; it also highlights our recent work on BF3·Et2O-catalyzed C2–H borylation of hetarenes. Despite these recent advances, comprehensive mechanistic studies on various metal-free catalytic aromatic C–H borylations and novel processes with a wider substrate scope are eagerly expected in the near future.

scholarly journals Recent Developments in Transition-Metal Catalyzed Direct C–H Alkenylation, Alkylation, and Alkynylation of Azoles

Molecules ◽  
2020 ◽  
Vol 25 (21) ◽  
pp. 4970
Author(s):  
Su Chen ◽  
Prabhat Ranjan ◽  
Leonid G. Voskressensky ◽  
Erik V. Van der Eycken ◽  
Upendra K. Sharma
Keyword(s):  
Transition Metal ◽  
Transition Metal Catalysis ◽  
Significant Progress ◽  
Metal Catalysis ◽  
Bond Functionalization ◽  
Recent Advances ◽  
Regioselective Alkylation ◽  
Recent Developments ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

The transition metal-catalyzed C–H bond functionalization of azoles has emerged as one of the most important strategies to decorate these biologically important scaffolds. Despite significant progress in the C–H functionalization of various heteroarenes, the regioselective alkylation and alkenylation of azoles are still arduous transformations in many cases. This review covers recent advances in the direct C–H alkenylation, alkylation and alkynylation of azoles utilizing transition metal-catalysis. Moreover, the limitations of different strategies, chemoselectivity and regioselectivity issues will be discussed in this review.

Quasi-nature catalysis. Rhodium-catalyzed C­C bond formation in air and water

2001 ◽  
Vol 73 (8) ◽  
pp. 1315-1318 ◽  
Author(s):  
Taisheng Huang ◽  
Sripathy Venkatraman ◽  
Yue Meng ◽  
Tien V. Nguyen ◽  
Daniel Kort ◽  
...  
Keyword(s):  
Transition Metal ◽  
Organic Synthesis ◽  
Bond Formation ◽  
Transition Metal Catalysis ◽  
Inert Gas ◽  
Natural Conditions ◽  
Metal Catalysis ◽  
Recent Advances ◽  
Gas Atmosphere

Transition-metal catalysis is out-grown from dry-boxes where the use of inert gas atmosphere and the exclusion of moisture have been essential. Such a restriction undoubtedly imposes limitations in the application of these reactions in organic synthesis and in the recycling of the catalysts. This article discusses some recent advances of rhodium-catalyzed carbon­carbon bond formations under the natural conditions of air and water.

Probing the versatility of metallo-electro hybrid catalysis: enabling access towards facile C–N bond formation

2020 ◽  
Vol 18 (44) ◽  
pp. 8994-9017
Author(s):  
Partha Pratim Sen ◽  
Neha Dagar ◽  
Swati Singh ◽  
Vishal Jyoti Roy ◽  
Vishali Pathania ◽  
...  
Keyword(s):  
Transition Metal ◽  
Bond Formation ◽  
Transition Metal Catalysis ◽  
Metal Catalysis ◽  
Recent Advances ◽  
Electro Catalysis

Metallo-electro catalysis has emerged as sustainable alternate to conventional transition metal methodologies. This review highlights the recent advances for the formation of C–N bonds by merging transition metal catalysis with electrosynthesis.

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