The Experts below are selected from a list of 1527 Experts worldwide ranked by ideXlab platform
Chanjuan Xi - One of the best experts on this subject based on the ideXlab platform.
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concise approach to benzisothiazol 3 2h one via copper catalyzed tandem reaction of o bromobenzamide and Potassium Thiocyanate in water
Journal of Organic Chemistry, 2012Co-Authors: Fei Wang, Chao Chen, Geng Deng, Chanjuan XiAbstract:A concise approach to various benzisothiazol-3(2H)-one derivatives has been developed by copper-catalyzed the reaction of o-bromobenzamide derivatives with Potassium Thiocyanate (KSCN) in water. The reaction proceeds via a tandem reaction with S–C bond and S–N bond formation.
Fei Wang - One of the best experts on this subject based on the ideXlab platform.
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[4 + 1] Cycloaddition Reaction of α,β-Alkynic Hydrazones and KSCN under Transition-Metal-Free Conditions: Synthesis of N‑Iminoisothiazolium Ylides
2018Co-Authors: Bei-bei Liu, Fei Wang, Wen-bin Cao, Shun-yi WangAbstract:A novel heteroannulation reaction between α,β-alkynic hydrazones and Potassium Thiocyanate has been developed for the synthesis of N-iminoisothiazolium ylides. The transformation features wide substrate scope, functional tolerance, and easy operation. This investigation involves a [4 + 1]-type cycloaddition reaction and C–S/S–N bond formation under transition-metal-free conditions. The application of this transformation to the gram-scale preparation of the N-imide ylide is also accomplished
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concise approach to benzisothiazol 3 2h one via copper catalyzed tandem reaction of o bromobenzamide and Potassium Thiocyanate in water
Journal of Organic Chemistry, 2012Co-Authors: Fei Wang, Chao Chen, Geng Deng, Chanjuan XiAbstract:A concise approach to various benzisothiazol-3(2H)-one derivatives has been developed by copper-catalyzed the reaction of o-bromobenzamide derivatives with Potassium Thiocyanate (KSCN) in water. The reaction proceeds via a tandem reaction with S–C bond and S–N bond formation.
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Concise Approach to Benzisothiazol-3(2H)-one via Copper-Catalyzed Tandem Reaction of o-Bromobenzamide and Potassium Thiocyanate in Water
2012Co-Authors: Fei Wang, Chao Chen, Geng DengAbstract:A concise approach to various benzisothiazol-3(2H)-one derivatives has been developed by copper-catalyzed the reaction of o-bromobenzamide derivatives with Potassium Thiocyanate (KSCN) in water. The reaction proceeds via a tandem reaction with S–C bond and S–N bond formation
Geng Deng - One of the best experts on this subject based on the ideXlab platform.
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concise approach to benzisothiazol 3 2h one via copper catalyzed tandem reaction of o bromobenzamide and Potassium Thiocyanate in water
Journal of Organic Chemistry, 2012Co-Authors: Fei Wang, Chao Chen, Geng Deng, Chanjuan XiAbstract:A concise approach to various benzisothiazol-3(2H)-one derivatives has been developed by copper-catalyzed the reaction of o-bromobenzamide derivatives with Potassium Thiocyanate (KSCN) in water. The reaction proceeds via a tandem reaction with S–C bond and S–N bond formation.
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Concise Approach to Benzisothiazol-3(2H)-one via Copper-Catalyzed Tandem Reaction of o-Bromobenzamide and Potassium Thiocyanate in Water
2012Co-Authors: Fei Wang, Chao Chen, Geng DengAbstract:A concise approach to various benzisothiazol-3(2H)-one derivatives has been developed by copper-catalyzed the reaction of o-bromobenzamide derivatives with Potassium Thiocyanate (KSCN) in water. The reaction proceeds via a tandem reaction with S–C bond and S–N bond formation
Uwe Schilde - One of the best experts on this subject based on the ideXlab platform.
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metal free regioselective monocyanation of hydroxy alkoxy and benzyloxyarenes by Potassium Thiocyanate and silica sulfuric acid as a cyanating agent
Journal of Organic Chemistry, 2019Co-Authors: Ali Reza Sardarian, Iman Dindarloo Inaloo, Ali Reza Modarresialam, Erich Kleinpeter, Uwe SchildeAbstract:A novel and efficient metal- and solvent-free regioselective para-C–H cyanation of hydroxy-, alkoxy-, and benzyloxyarene derivatives has been introduced, using nontoxic Potassium Thiocyanate as a cyanating reagent in the presence of silica sulfuric acid (SSA). The desired products are obtained in good to high yields without any toxic byproducts.
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Metal-Free Regioselective Monocyanation of Hydroxy‑, Alkoxy‑, and Benzyloxyarenes by Potassium Thiocyanate and Silica Sulfuric Acid as a Cyanating Agent
2019Co-Authors: Ali Reza Sardarian, Iman Dindarloo Inaloo, Erich Kleinpeter, Ali Reza Modarresi-alam, Uwe SchildeAbstract:A novel and efficient metal- and solvent-free regioselective para-C–H cyanation of hydroxy-, alkoxy-, and benzyloxyarene derivatives has been introduced, using nontoxic Potassium Thiocyanate as a cyanating reagent in the presence of silica sulfuric acid (SSA). The desired products are obtained in good to high yields without any toxic byproducts
Na You - One of the best experts on this subject based on the ideXlab platform.
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phase equilibria study of the benzene cyclohexane n n dimethylformamide Potassium Thiocyanate quaternary systems
Fluid Phase Equilibria, 2014Co-Authors: Sha Song, Chunguang Lin, Na YouAbstract:Abstract This work demonstrates the ability of N,N-dimethylformamide + Potassium Thiocyanate(DMF + KSCN) to act as a novel complex solvent for the removal of benzene from its mixture with cyclohexane. The (liquid + liquid) equilibria (LLE) were measured for a quaternary system of (DMF + KSCN + benzene + cyclohexane) under atmospheric pressure and at temperature 298.15 K. The tie-line data for quaternary mixtures of (DMF + KSCN + benzene + cyclohexane) are also presented. The selectivity coefficients from these LLE data were calculated and found to be better than those previously reported in the literature for the (DMF + benzene + cyclohexane) systems. Excellent correlation of data by the nonrandom two-liquid (NRTL) model was seen for the quaternary system and the predicted results were found to be in fairly good agreement with experimental data.
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selection of internal standard for quantitative analysis of extraction of benzene from cyclohexane with n n dimethylformamide Potassium Thiocyanate complex solvent
Chromatographia, 2014Co-Authors: Sha Song, Chunguang Lin, Na YouAbstract:The use of novel complex solvents in liquid–liquid extraction of aromatic hydrocarbons has become an important aim in the petrochemical industry. Phase equilibrium data are necessary for the design, evaluation, and optimization of extraction processes that are based on phase equilibria. To detect the separation effect of benzene/cyclohexane mixtures accurately and obtain the phase equilibrium data, a fast and efficient liquid–liquid extraction method combined with internal-standard gas chromatography was established for the quantitative analysis of the extraction of benzene from cyclohexane with the N,N-dimethylformamide/Potassium Thiocyanate (DMF/KSCN) novel complex solvent. The phase separation phenomenon occurred in a quaternary (benzene/cyclohexane/DMF/KSCN) system. KSCN as a cosolvent to improve the selectivity of DMF was innovatively applied and there was no prior report of any quantitative analysis of this system. After repeated experiments, n-butyl alcohol was found to be a suitable internal standard. The proposed method exhibits good linearity with a coefficient of correlation ranging from 0.9982 to 0.9994. The limits of detection varied from 0.16 to 0.58 mg L−1. The recovery was from 90.91 to 109.44 %. The method achieved excellent reproducibility with interassay relative standard deviations of 1.9–7.1 %. Furthermore the accuracy and precision of the proposed method with DMF/KSCN as the extractant were compared with the same method with only DMF as the extractant. The results indicated that adding KSCN had no significant impact on this quantitative method, although the KSCN could not be detected by gas chromatography (the mass fraction of KSCN was calculated via mass balance). Liquid–liquid equilibrium data obtained from this proposed method also revealed that the DMF/KSCN complex solvent had a higher selectivity for benzene than that of only DMF. This method is suitable for routine quantification of benzene, cyclohexane, DMF, and KSCN with high precision and accuracy.