CuBr 2 ‐Promoted Multicomponent Aerobic Reaction for the Synthesis of 1,2,3‐Triaroylindolizines

2019 ◽  
Vol 56 (8) ◽  
pp. 2253-2261 ◽  
Author(s):  
Jinwei Sun ◽  
Junwen Han ◽  
Yuxuan Zhang ◽  
Yun Liu
Keyword(s):  
Aerobic Reaction

A study of the aerobic reaction between dopamine and Fe(III) in the presence of S2O3 2−

2009 ◽  
Vol 34 (6) ◽  
pp. 677-681 ◽  
Author(s):  
Wagner José Barreto ◽  
Sonia Regina Giancoli Barreto ◽  
Waleria Pickina Silva
Keyword(s):  
Aerobic Reaction

Carbon tetrabromide as an electron acceptor in heterogeneous photocatalysis

1989 ◽  
Vol 67 (6) ◽  
pp. 1061-1064 ◽  
Author(s):  
H. Al-Ekabi ◽  
A. M. Draper ◽  
P. De Mayo
Keyword(s):  
Titanium Oxide ◽  
Electron Acceptor ◽  
Cadmium Sulphide ◽  
Heterogeneous Photocatalysis ◽  
Oxidation Products ◽  
Electron Hole ◽  
Valence Isomerization ◽  
Carbon Tetrabromide ◽  
Hole Recombination ◽  
Aerobic Reaction

Three reactions: the CdS-mediated valence isomerization of hexamethyldewarbenzene to hexamethylbenzene, the cycloreversion of dianthracene, and the TiO2-mediated cis–trans isomerization of stilbene are known to be suppressed when the semiconductor excitation takes place in the absence of oxygen. The oxygen, when present, is presumed to trap the electron delaying electron-hole recombination. It has been found that CBr4 may replace oxygen and functions in a similar way. In addition, the concomitant formation of oxidation products in the TiO2-mediated aerobic reaction is avoided. The mechanism is discussed. Keywords: cadmium sulphide, carbon tetrabromide, dianthracene, heterogeneous photocatalysis, hexamethyldewarbenzene, titanium oxide.

scholarly journals Hydrogen Generation from Biowaste & Its Application as A Fuel

2021 ◽  
Vol 9 (11) ◽  
pp. 660-664
Author(s):  
Rishabh Sehgal
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Generation ◽  
Good Alternative ◽  
H2 Production ◽  
Rapid Decrease ◽  
Natural Gases ◽  
Long Time ◽  
Production Techniques ◽  
Biological Methods ◽  
Aerobic Reaction

Abstract: With the rapid decrease in conventional energy sources and serious issues like Global Warming and change in the climate, there is an immediate need to find sources that are renewable and will last for a long time. Hydrogen as a fuel is a good alternative given its abundance. Hydrogen production uses natural gases and electrolysis of water, thus directly or indirectly creating pollution. But this doesn’t mean that energy provided by hydrogen is clean in the utmost sense. Hence there is a need to segregate and analyze different Hydrogen production techniques. In this paper, we will briefly discuss the biological methods of Hydrogen production from biomass and applications of hydrogen. Keywords: Biological H2 production, Aerobic Reaction, Anaerobic reactions, Fuel cell.

scholarly journals Evidence for an oleoyl phosphatidylcholine desaturase in microsomal preparations from cotyledons of safflower (Carthamus tinctorius) seed

1979 ◽  
Vol 179 (3) ◽  
pp. 649-656 ◽  
Author(s):  
C R Slack ◽  
P G Roughan ◽  
J Browse
Keyword(s):  
Incubation Period ◽  
Initial Rate ◽  
Specific Radioactivity ◽  
Carthamus Tinctorius ◽  
Aerobic Reaction

1. [14C]Oleoyl-CoA was metabolized rapidly and essentially completely by microsomal preparations from developing safflower (Carthamus tinctorius) cotyledons, and most of the [14C]oleate was incorporated into 3-sn-phosphatidylcholine. 2. In aerobic reaction mixtures containing NADH2 the [14C]oleate in 3-sn-phosphatidylcholine was converted into [14C]linoleate without any change in the specific radioactivity of the lipid. Over a 60 min incubation period the extent of conversion of [14C]oleoyl phosphatidylcholine into [14C]linoleoyl phosphatidylcholine was generally greater than 60%. The rate of desaturation of endogenous [14C]oleoyl phosphatidylcholine labelled from [14C]oleoyl-CoA was much greater that of exogenous [14C]dioleoyl phosphatidylcholine the specific radioactivity of the oleoyl moiety of the lipid remained constant, indicating that labelled and unlabelled oleate were desaturated at the same rate. On this assumption an initial rate of desaturation of about 15 nmol of oleate desaturated/min per mumol of 3-sn-phosphatidylcholine was estimated. 4. [14C]Oleate esterified at positions 1 and 2 of both endogenous and exogenous 3-sn-phosphatidylcholine was desaturated. 5. Attempts to demonstrate the presence of an oleoyl-CoA desaturase in safflower microsomal fractions by the appearance of linoleoyl-CoA in reaction mixtures were inconclusive.

scholarly journals Copper-catalyzed aerobic radical C–C bond cleavage of N–H ketimines

2015 ◽  
Vol 11 ◽  
pp. 1933-1943 ◽  
Author(s):  
Ya Lin Tnay ◽  
Gim Yean Ang ◽  
Shunsuke Chiba
Keyword(s):  
Bond Cleavage ◽  
Grignard Reagents ◽  
Radical Intermediate ◽  
Reaction Conditions ◽  
Radical Process ◽  
Radical Fragmentation ◽  
Aerobic Reaction

We report herein studies on copper-catalyzed aerobic radical C–C bond cleavage of N–H ketimines. Treatment of N–H ketimines having an α-sp3 hybridized carbon under Cu-catalyzed aerobic reaction conditions resulted in a radical fragmentation with C–C bond cleavage to give the corresponding carbonitrile and carbon radical intermediate. This radical process has been applied for the construction of oxaspirocyclohexadienones as well as in the electrophilic cyanation of Grignard reagents with pivalonitrile as a CN source.

A Novel Approach to N′,N′-Diarylhydrazides from N′-Arylhydrazides

Synlett ◽  
2015 ◽  
Vol 26 (08) ◽  
pp. 1121-1123 ◽  
Author(s):  
Jing-Hua Li ◽  
Jun Yu ◽  
Shuguang Wang ◽  
Jianming Wen ◽  
Jian Wang
Keyword(s):  
Aerobic Oxidation ◽  
Mild Conditions ◽  
Novel Approach ◽  
Novel Method ◽  
Aerobic Reaction ◽  
Mechanism Of The Reaction

A novel method for conversion of N′-arylhydrazides to N′,N′-diarylhydrazides via aerobic oxidation has been achieved. The aerobic reaction was performed using CuCl2 as a catalyst in NH3·H2O–MeOH to give good yields under mild conditions. The mechanism of the reaction is also discussed.

scholarly journals Reactions of Rh2(CH3COO)4with thiols and thiolates: a structural study

2019 ◽  
Vol 26 (2) ◽  
pp. 450-461 ◽  
Author(s):  
Alejandra Enriquez Garcia ◽  
Farideh Jalilehvand ◽  
Pantea Niksirat
Keyword(s):  
Density Functional ◽  
Aqueous Media ◽  
Colour Change ◽  
Reaction Products ◽  
Functional Theory ◽  
Dihydrolipoic Acid ◽  
Td Dft ◽  
X Ray Absorption ◽  
Aerobic Reaction ◽  
Proteins And Peptides

The structural differences between the aerobic reaction products of Rh2(AcO)4(1; AcO−= CH3COO−) with thiols and thiolates in non-aqueous media are probed by X-ray absorption spectroscopy. For this study, ethanethiol, dihydrolipoic acid (DHLA; a dithiol) and their sodium thiolate salts were used. Coordination of simple thiols to the axial positions of Rh2(AcO)4with Rh—SH bonds of 2.5–2.6 Å keeps the RhII—RhIIbond intact (2.41 ± 0.02 Å) but leads to a colour change from emerald green to burgundy. Time-dependent density functional theory (TD-DFT) calculations were performed to explain the observed shifts in the electronic (UV–vis) absorption spectra. The corresponding sodium thiolates, however, break up the Rh2(AcO)4framework in the presence of O2to form an oligomeric chain of triply S-bridged Rh(III) ions, each with six Rh—S (2.36 ± 0.02 Å) bonds. The RhIII...RhIIIdistance, 3.18 ± 0.02 Å, in the chain is similar to that previously found for the aerobic reaction product from aqueous solutions of Rh2(AcO)4and glutathione (H3A), {Na2[Rh2III(HA)4]·7H2O}n, in which each Rh(III) ion is surrounded by about four Rh—S (2.33 ± 0.02 Å) and about two Rh—O (2.08 ± 0.02 Å). The reaction products obtained in this study can be used to predict how dirhodium(II) tetracarboxylates would react with cysteine-rich proteins and peptides, such as metallothioneins.

scholarly journals FeCl2-Catalyzed Intramolecular Aerobic Reaction for Construction of Isoxazoles Heterocycle

2020 ◽  
Vol 40 (6) ◽  
pp. 1697
Author(s):  
Ablimit Abdukader ◽  
Rong Wang ◽  
Marhaba Mamat ◽  
Chenjiang Liu
Keyword(s):  
Aerobic Reaction
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