Dehydrogenative coupling reactions catalysed by Rose Bengal using visible light irradiation

2011 ◽  
Vol 13 (10) ◽  
pp. 2682 ◽  
Author(s):  
Yuanhang Pan ◽  
Choon Wee Kee ◽  
Li Chen ◽  
Choon-Hong Tan
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Rose Bengal ◽  
Light Irradiation ◽  
Coupling Reactions ◽  
Dehydrogenative Coupling

scholarly journals TiO2 Photocatalyzed C–H Bond Transformation for C–C Coupling Reactions

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 355 ◽  
Author(s):  
Yi Wang ◽  
Anan Liu ◽  
Dongge Ma ◽  
Shuhong Li ◽  
Chichong Lu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Transition Metal Catalysis ◽  
Light Irradiation ◽  
Coupling Reactions ◽  
Metal Catalysis ◽  
Bond Functionalization ◽  
Tio2 Photocatalysis ◽  
Mild Conditions

Fulfilling the direct inert C–H bond functionalization of raw materials that are earth-abundant and commercially available for the synthesis of diverse targeted organic compounds is very desirable and its implementation would mean a great reduction of the synthetic steps required for substrate prefunctionalization such as halogenation, borylation, and metalation. Successful C–H bond functionalization mainly resorts to homogeneous transition-metal catalysis, albeit sometimes suffering from poor catalyst reusability, nontrivial separation, and severe biotoxicity. TiO2 photocatalysis displays multifaceted advantages, such as strong oxidizing ability, high chemical stability and photostability, excellent reusability, and low biotoxicity. The chemical reactions started and delivered by TiO2 photocatalysts are well known to be widely used in photocatalytic water-splitting, organic pollutant degradation, and dye-sensitized solar cells. Recently, TiO2 photocatalysis has been demonstrated to possess the unanticipated ability to trigger the transformation of inert C–H bonds for C–C, C–N, C–O, and C–X bond formation under ultraviolet light, sunlight, and even visible-light irradiation at room temperature. A few important organic products, traditionally synthesized in harsh reaction conditions and with specially functionalized group substrates, are continuously reported to be realized by TiO2 photocatalysis with simple starting materials under very mild conditions. This prominent advantage—the capability of utilizing cheap and readily available compounds for highly selective synthesis without prefunctionalized reactants such as organic halides, boronates, silanes, etc.—is attributed to the overwhelmingly powerful photo-induced hole reactivity of TiO2 photocatalysis, which does not require an elevated reaction temperature as in conventional transition-metal catalysis. Such a reaction mechanism, under typically mild conditions, is apparently different from traditional transition-metal catalysis and beyond our insights into the driving forces that transform the C–H bond for C–C bond coupling reactions. This review gives a summary of the recent progress of TiO2 photocatalytic C–H bond activation for C–C coupling reactions and discusses some model examples, especially under visible-light irradiation.

An effective photothermal dual-responsive Pd1Cu4/CexOy catalyst for Suzuki–Miyaura coupling reactions under mild conditions

2020 ◽  
Vol 44 (9) ◽  
pp. 3794-3801
Author(s):  
Bo Liu ◽  
Tong Xu ◽  
Chunping Li ◽  
Jie Bai
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Coupling Reactions ◽  
Suzuki Reactions ◽  
Mild Conditions ◽  
Dual Responsive

A Pd1Cu4/CexOy catalyst can efficiently catalyze Suzuki reactions under both heating and visible light irradiation conditions.

A photoinduced cross-dehydrogenative-coupling (CDC) reaction between aldehydes and N-hydroxyimides by a TiO2–Co ascorbic acid nanohybrid under visible light irradiation

2018 ◽  
Vol 42 (2) ◽  
pp. 807-811 ◽  
Author(s):  
Fahimeh Feizpour ◽  
Maasoumeh Jafarpour ◽  
Abdolreza Rezaeifard
Keyword(s):  
Ascorbic Acid ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Selective Synthesis ◽  
Dehydrogenative Coupling

A TiO2–Co ascorbic acid nanohybrid as an efficient photocatalyst catalyzed the selective synthesis of N-hydroxyimide esters through visible light irradiation.

Controllable chemoselectivity in the coupling of bromoalkynes with alcohols under visible-light irradiation without additives: synthesis of propargyl alcohols and α-ketoesters

2019 ◽  
Vol 55 (58) ◽  
pp. 8438-8441 ◽  
Author(s):  
Ke Ni ◽  
Ling-Guo Meng ◽  
Hongjie Ruan ◽  
Lei Wang
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Coupling Reactions ◽  
Reaction Atmosphere ◽  
Propargyl Alcohols

The chemoselectivity of visible-light-induced coupling reactions of bromoalkynes with alcohols can be controlled by simple changes to the reaction atmosphere.

Facile fabrication of CuO-Pb 2 O 3 nanophotocatalyst for efficient degradation of Rose Bengal dye under visible light irradiation

2018 ◽  
Vol 433 ◽  
pp. 206-212 ◽  
Author(s):  
Eswaran Kamaraj ◽  
Sivaraman Somasundaram ◽  
Kavitha Balasubramani ◽  
Muthu Prema Eswaran ◽  
Rajarajan Muthuramalingam ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Rose Bengal ◽  
Light Irradiation ◽  
Rose Bengal Dye ◽  
Facile Fabrication
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