Cyanosilylation of Aldehydes Catalyzed by Iron(III) Arylhydrazone-β-Diketone Complexes

2018 ◽  
Vol 71 (3) ◽  
pp. 190 ◽  
Author(s):  
Atash V. Gurbanov ◽  
Abel M. Maharramov ◽  
Fedor I. Zubkov ◽  
Alexander M. Saifutdinov ◽  
Firudin I. Guseinov
Keyword(s):  
Room Temperature ◽  
High Yield ◽  
Homogeneous Catalysts ◽  
Trimethylsilyl Cyanide ◽  
Trimethylsilyl Ethers

Two known iron(iii) complexes, [Fe(H2O)3(L1)]·xH2O (x = 4 (1), 5 (2)) and [Fe(H2O)3(L2)]·3H2O (3), bearing the basic forms of 5-chloro-3-(2-(4,4-dimethyl-2,6-dioxocyclohexylidene)hydrazinyl)-2-hydroxybenzenesulfonic acid (H3L1) and 3-(2-(2,4-dioxopentan-3-ylidene)hydrazinyl)-2-hydroxy-5-nitrobenzenesulfonic acid (H3L2), were prepared and used as homogeneous catalysts for cyanosilylation of a variety of aldehydes with trimethylsilyl cyanide leading to the corresponding cyanohydrin trimethylsilyl ethers. High yield (up to 98 %) was observed in the reaction catalyzed by 3 at room temperature in methanol.

scholarly journals A Practical and Improved Method for the Preparation of Trimethylsilyl Cyanide Catalysed by PEG400 and Zinc Iodide

2003 ◽  
Vol 2003 (8) ◽  
pp. 500-501 ◽  
Author(s):  
Yu-Qing Cao ◽  
Yun-Fei Du ◽  
Ji-Tai Li
Keyword(s):  
Room Temperature ◽  
Potassium Cyanide ◽  
High Yield ◽  
Improved Method ◽  
Ultrasonic Radiation ◽  
Trimethylsilyl Cyanide ◽  
Zinc Iodide

The useful synthetic reagent trimethylsilyl cyanide was readily prepared in high yield by the cyanation of trimethylchlorosilane with potassium cyanide in the presence of PEG400 and zinc iodide under stirring at room temperature or ultrasonic radiation.

scholarly journals ZnO/RGO Heterojunction Based near Room Temperature Alcohol SENSOR with Improved Efficiency

2021 ◽  
Vol 6 (1) ◽  
pp. 25
Author(s):  
Sanghamitra Ghosal ◽  
Partha Bhattacharyya
Keyword(s):  
Active Sites ◽  
Room Temperature ◽  
Surface Engineering ◽  
Gas Sensing ◽  
Energy Band Diagram ◽  
Future Generation ◽  
High Yield ◽  
Synthesis Process ◽  
Ethanol Sensor ◽  
Vapor Sensing

The systematic optimization of surface engineering (dimensionality) indeed plays a crucial role in achieving efficient vapor-sensing performance. Among various semiconducting metal oxides, owing to some of its unique features and advantages, ZnO has attracted researchers on a global scale due to its application in various fields, including chemical sensors. The concomitant optimization of the surface attributes (varying different dimensions) of ZnO have become a sensation for the entire research community. Moreover, the small thickness and extremely large surface of exfoliated 2D nanosheets render the gas sensing material an ideal candidate for achieving strong coupling with different gas molecules. However, temperature is a crucial factor in the field of chemical sensing. Recently, graphene-based gas sensors have attracted attention due to their variety of structures, unique sensing performances and room temperature working conditions. In this work, a highly sensitive and fast responsive low temperature (60 °C)-based ethanol sensor, based on RGO/2D ZnO nanosheets hybrid structure, is reported. After detailed characterizations, the vapor sensing potentiality of this sensor was tested for the detection of ethanol. The ethanol sensor offered the response magnitude of 89% (100 ppm concentration) with response and recovery time of 12 s/29 s, respectively. Due to excessively high number of active sites for VOC interaction, with high yield synthesis process and appreciably high carrier mobility, this has paved the way for developing future generation, miniaturized and flexible (wearable) vapor sensor devices, meeting the multidimensional requirements for traditional and upcoming (health/medical sector) applications. The underlying mechanistic framework for vapor sensing, using this hybrid junction, is explained with the Energy Band Diagram.

An efficient catalytic asymmetric addition of trimethylsilyl cyanide to aldehydes at room temperature

2005 ◽  
Vol 46 (13) ◽  
pp. 2223-2226 ◽  
Author(s):  
Zi-Bo Li ◽  
Amaresh R. Rajaram ◽  
Nattawan Decharin ◽  
Ying-Chuan Qin ◽  
Lin Pu
Keyword(s):  
Room Temperature ◽  
Asymmetric Addition ◽  
Trimethylsilyl Cyanide ◽  
Catalytic Asymmetric

Solvent effect on simple and high yield synthesis of polydichlorophosphazene precursor Cl3PNSiMe3

2021 ◽  
Author(s):  
Elif Büşra Çelebi ◽  
Ferda Hacıvelioğlu
Keyword(s):  
Solvent Effect ◽  
Room Temperature ◽  
Solvent Polarity ◽  
High Yield ◽  
Effect Of Solvent ◽  
Nonpolar Solvents

The effect of solvent polarity on the reaction of PCl5 with (Me3Si)2NH has been investigated and it is found that nonpolar solvents promote the formation of Cl3PNSiMe3, whereas the more polar chloroform gives unusual phosphazenes at room temperature.

An efficient multicomponent, one-pot synthesis of Betti bases catalyzed by cerium (IV) ammonium nitrate (CAN) at ambient temperature

2016 ◽  
Vol 5 (4) ◽  
Author(s):  
Ramadan Ahmed Mekheimer ◽  
Abdullah Mohamed Asiri ◽  
Afaf Mohamed Abdel Hameed ◽  
Reham R. Awed ◽  
Kamal Usef Sadek
Keyword(s):  
Ambient Temperature ◽  
Environmental Pollution ◽  
Ammonium Nitrate ◽  
Room Temperature ◽  
Catalytic Amount ◽  
High Yield ◽  
Reaction Conditions ◽  
One Pot ◽  
Work Up ◽  
Cerium Iv Ammonium Nitrate

AbstractStarting from readily available 2-naphthol, aldehydes, aryl and alkylamines, a variety of Betti bases were efficiently synthesized utilizing a catalytic amount of cerium (IV) ammonium nitrate (CAN) at room temperature. This protocol has advantages of high yield, mild reaction conditions, no environmental pollution, diversity of reactants and simple work up procedure.

Room temperature preparation of cellulose nanocrystals with high yield via a new ZnCl2 solvent system

2021 ◽  
pp. 118946
Author(s):  
Junchai Zhao ◽  
Mengwei Deng ◽  
Shuaiyao Li ◽  
Zheng Guan ◽  
Yixuan Xia ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Room Temperature ◽  
Solvent System ◽  
High Yield ◽  
Temperature Preparation

An Efficient Two-Step Protocol for the Isoprenylation of Xanthone at the C2 Position Starting from 1-Fluoroxanthone Derivative

Synlett ◽  
2020 ◽  
Vol 31 (14) ◽  
pp. 1423-1429
Author(s):  
Takashi Matsumoto ◽  
Yuuki Fujimoto ◽  
Chisato Furukawa ◽  
Kanae Takahashi ◽  
Miho Mochizuki ◽  
...  
Keyword(s):  
Silica Gel ◽  
Room Temperature ◽  
Claisen Rearrangement ◽  
High Yield ◽  
Side Chain ◽  
Snar Reaction

The SNAr reaction of 1-fluoroxanthone derivatives with alkoxide of 1,1-dimethylallyl alcohol cleanly afforded the corresponding ethers, which have thus far been unavailable. The obtained ethers underwent the Claisen rearrangement at room temperature by treatment with silica gel in toluene. This two-step protocol provides expeditious and high-yield access to xanthones possessing isoprenyl or the related allylic side chain at the C2 position.

Continuous flow biodiesel production from wet microalgae using a hybrid thin film microfluidic platform

2018 ◽  
Vol 54 (85) ◽  
pp. 12085-12088 ◽  
Author(s):  
Eko K. Sitepu ◽  
Darryl B. Jones ◽  
Youhong Tang ◽  
Sophie C. Leterme ◽  
Kirsten Heimann ◽  
...  
Keyword(s):  
Thin Film ◽  
Continuous Flow ◽  
Room Temperature ◽  
Biodiesel Production ◽  
High Yield ◽  
Hybrid Thin Film ◽  
Microfluidic Platform ◽  
Thin Film Device ◽  
Wet Microalgae

A novel continuous flow turbo-thin film device (T2FD) is effective in producing biodiesel in high yield from wet microalgae at room temperature.

Sign in / Sign up

Export Citation Format

Share Document