scholarly journals 12-Tungstophosphate Acids: An Efficient, Green and Recyclable Photocatalyst in Carbon-Carbon Double Bond Isomerization on Linear Alpha Olefins

2021 ◽  
Vol 2 (11) ◽  
pp. 1170-1175
Author(s):  
Wangjing Ma ◽  
Xiao TC ◽  
Liu BN ◽  
Xu ZC ◽  
Jin ZQ ◽  
...  
Keyword(s):  
Double Bond ◽  
High Selectivity ◽  
Environmentally Friendly ◽  
Recyclable Catalyst ◽  
Double Bond Isomerization ◽  
Carbon Double Bond ◽  
Uv Visible ◽  
Recyclable Photocatalyst ◽  
High Yields ◽  
Alpha Olefins

The accelerated UV visible photocatalytic carbon-carbon double bond isomerization of Linear Alpha Olefins (LAO) with 12-Tungstophosphate Acids (12-TPA) as an efficient, environmentally-friendly and recyclable catalyst was described, which produced the corresponding Linear Internal Olefins (LIO) in general high selectivity and high yields.

Intramolecular Addition of a Dimethylamino C(sp3)–H Bond across C–C Triple Bonds using IrCl(DTBM-SEGPHOS)(ethylene) Catalyst: Synthesis of Indoles from 2-Alkynyl-N-methylanilines

Synthesis ◽  
2021 ◽  
Author(s):  
Toshimichi Ohmura ◽  
Kaito Yagi ◽  
Takeru Torigoe ◽  
Michinori Suginome
Keyword(s):  
Double Bond ◽  
Triple Bond ◽  
Iridium Complex ◽  
Dimethylamino Group ◽  
Catalyst Synthesis ◽  
Double Bond Isomerization ◽  
Triple Bonds ◽  
High Yields

Intramolecular addition of a C(sp3)–H bond of a dimethylamino group across a C–C triple bond in 2-alkynyl-N,N-dimethylanilines was effectively catalyzed by a new iridium complex IrCl(DTBM-SEGPHOS)(C2H4) in mesitylene at 150 °C. The intramolecular C(sp3)–H addition was followed by double bond isomerization to afford 3-substituted indoles in good to high yields.

scholarly journals Copper-Catalyzed Asymmetric 1,2-Addition of Grignard Reagents to 3-Acyl 2H-chromenes

Synlett ◽  
2017 ◽  
Vol 28 (19) ◽  
pp. 2624-2628 ◽  
Author(s):  
Adriaan Minnaard ◽  
Beatriz Calvo
Keyword(s):  
Double Bond ◽  
Grignard Reagents ◽  
Tertiary Alcohols ◽  
Carbon Double Bond ◽  
High Yields

Enones in which the carbon–carbon double bond is part of the pharmacologically important 2H-chromene (2H-1-benzopyran) nucleus undergo asymmetric copper-catalyzed 1,2-addition of Grignard reagents. High yields and enantiomeric excesses up to 84% are obtained and access to these novel enantio-enriched tertiary alcohols is provided.

Blue-light-promoted carbon–carbon double bond isomerization and its application in the syntheses of quinolines

2017 ◽  
Vol 15 (30) ◽  
pp. 6349-6352 ◽  
Author(s):  
Xinzheng Chen ◽  
Shuxian Qiu ◽  
Sasa Wang ◽  
Huifei Wang ◽  
Hongbin Zhai
Keyword(s):  
Double Bond ◽  
Blue Light ◽  
Double Bond Isomerization ◽  
Carbon Double Bond

Syntheses of quinolines through blue-light-promoted carbon–carbon double bond isomerization in the absence of any photoredox catalyst.

Synthesis and Spectroscopic Study of Pentacarbonyl(η2-tetracyanoethylene) Metal(0) Complexes of the Group 6 B Elements

1994 ◽  
Vol 49 (5) ◽  
pp. 717-720 ◽  
Author(s):  
İzzet A. Mour ◽  
Saim Özkar
Keyword(s):  
Double Bond ◽  
Nmr Spectroscopy ◽  
Spectroscopic Study ◽  
Spectral Data ◽  
Photochemical Reaction ◽  
Room Temperature ◽  
Carbon Double Bond ◽  
Uv Visible ◽  
Metal Ligand ◽  
C Nmr

Pentacarbonyl(η2-tetracyanoethylene) metal(0) complexes of chromium, molybdenum and tung­sten have been synthesized by the photochemical reaction of hexacarbonyl metal(o) with tetra- cyanoethylene in toluene at room temperature. The complexes were purified by chromatography and recrystallization, and characterized by UV- visible, IR and 13C NMR spectroscopy. Tetra- cyanoethylene is symmetrically bonded to the M(CO)5 unit through its carbon-carbon double bond as an η2-ligand. The spectral data are dis­cussed in terms of the metal → ligand π inter­action.

Carbon–carbon double bond isomerization in heterocyclic hydrazine derivatives

2018 ◽  
Vol 54 (5) ◽  
pp. 572-575
Author(s):  
Mihkel Ilisson ◽  
Kristjan Tomson ◽  
Tarmo Tamm ◽  
Uno Mäeorg
Keyword(s):  
Double Bond ◽  
Double Bond Isomerization ◽  
Hydrazine Derivatives ◽  
Carbon Double Bond
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