The Experts below are selected from a list of 11124 Experts worldwide ranked by ideXlab platform
Faranak Najafizadeh - One of the best experts on this subject based on the ideXlab platform.
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Polyvinylpolypyrrolidone-bound Boron Trifluoride (PVPP-BF3); a mild and efficient catalyst for synthesis of 4-metyl coumarins via the Pechmann reaction
Comptes Rendus Chimie, 2012Co-Authors: Masoud Mokhtary, Faranak NajafizadehAbstract:Abstract Polyvinylpolypyrrolidone-supported Boron Trifluoride has been studied for synthesis of 4-methyl coumarin by the Pechmann reaction. The reaction proceeded smoothly with hydroxyl phenols and ethyl acetoacetate in good yields in ethanol at reflux conditions. The polyvinylpolypyrrolidone-Boron Trifluoride complex is a non-corrosive and stable solid catalyst elevated Lewis acid property.
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Polyvinylpolypyrrolidone-bound Boron Trifluoride: A highly efficient catalyst for acylation of alcohols, phenols and trimethylsilyl ethers by acetic anhydride
Comptes Rendus Chimie, 2012Co-Authors: Masoud Mokhtary, Mohammad Qandalee, Faranak NajafizadehAbstract:Abstract A highly efficient method for the acylation of alcohols, phenols and trimethylsilyl ethers with acetic anhydride is described using polyvinylpolypyrrolidone-bound Boron Trifluoride (PVPP-BF 3 ) under mild and heterogeneous conditions at room temperature in good to excellent yields. The polyvinylpolypyrrolidone-Boron Trifluoride complex shows more water tolerant, non-corrosive and stable solid catalyst elevated Lewis acid properties.
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Polyvinylpolypyrrolidone-Supported Boron Trifluoride; Highly Efficient Catalyst for the Synthesis of N-tert-Butyl Amides
E-journal of Chemistry, 2012Co-Authors: Masoud Mokhtary, Faranak NajafizadehAbstract:Highly efficient method for the preparation of N-tert-butyl amides by reaction of nitriles with tert-butyl acetate is described using polyvinylpolypyrrolidone-supported Boron Trifluoride (PVPP-BF3) at 70°C in good to excellent yields. Selective amidation of benzonitrile in the presence of acetonitrile was also achieved. polyvinylpolypyrrolidone-Boron Trifluoride complex shows non-corrosive and stable solid catalyst elevated Lewis acid property.
Masoud Mokhtary - One of the best experts on this subject based on the ideXlab platform.
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Polyvinylpolypyrrolidone-supported Boron Trifluoride: a mild and efficient catalyst for the synthesis of 1,8-dioxooctahydroxanthenes and 1,8-dioxodecahydroacridines
Monatshefte Fur Chemie, 2014Co-Authors: Masoud Mokhtary, Seyed Abdollah Mirfarjood LangroudiAbstract:Polyvinylpolypyrrolidone-supported Boron Trifluoride has been studied for the synthesis of 1,8-dioxooctahydroxanthenes and 1,8-dioxodecahydroacridines. The reaction proceeded via condensation of: (1) aromatic aldehydes (1 eq.) and 5,5-dimethyl-1,3-cyclohexanedione (2 eq.) in acetonitrile at room temperature, (2) aromatic aldehydes (1 eq.), 5,5-dimethyl-1,3-cyclohexanedione (2 eq.), and aromatic amines (1 eq.) in acetonitrile at 80 °C in the presence of polyvinylpolypyrrolidone-supported Boron Trifluoride. This procedure cleanly converted a variety of aryl aldehydes with different substituent groups at ortho, meta, or para positions to the corresponding products. Convenience and efficiency, an easy work-up procedure, high yield, and simple preparation of the catalyst are some advantages of this method. In addition, the polyvinylpolypyrrolidone-supported Boron Trifluoride complex is a high loaded Lewis acid, which is stable, easy to handle, and retains effective activity after several months of storage.
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Polyvinylpolypyrrolidone-bound Boron Trifluoride (PVPP-BF3); a mild and efficient catalyst for synthesis of 4-metyl coumarins via the Pechmann reaction
Comptes Rendus Chimie, 2012Co-Authors: Masoud Mokhtary, Faranak NajafizadehAbstract:Abstract Polyvinylpolypyrrolidone-supported Boron Trifluoride has been studied for synthesis of 4-methyl coumarin by the Pechmann reaction. The reaction proceeded smoothly with hydroxyl phenols and ethyl acetoacetate in good yields in ethanol at reflux conditions. The polyvinylpolypyrrolidone-Boron Trifluoride complex is a non-corrosive and stable solid catalyst elevated Lewis acid property.
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Polyvinylpolypyrrolidone-bound Boron Trifluoride: A highly efficient catalyst for acylation of alcohols, phenols and trimethylsilyl ethers by acetic anhydride
Comptes Rendus Chimie, 2012Co-Authors: Masoud Mokhtary, Mohammad Qandalee, Faranak NajafizadehAbstract:Abstract A highly efficient method for the acylation of alcohols, phenols and trimethylsilyl ethers with acetic anhydride is described using polyvinylpolypyrrolidone-bound Boron Trifluoride (PVPP-BF 3 ) under mild and heterogeneous conditions at room temperature in good to excellent yields. The polyvinylpolypyrrolidone-Boron Trifluoride complex shows more water tolerant, non-corrosive and stable solid catalyst elevated Lewis acid properties.
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Polyvinylpolypyrrolidone-Supported Boron Trifluoride; Highly Efficient Catalyst for the Synthesis of N-tert-Butyl Amides
E-journal of Chemistry, 2012Co-Authors: Masoud Mokhtary, Faranak NajafizadehAbstract:Highly efficient method for the preparation of N-tert-butyl amides by reaction of nitriles with tert-butyl acetate is described using polyvinylpolypyrrolidone-supported Boron Trifluoride (PVPP-BF3) at 70°C in good to excellent yields. Selective amidation of benzonitrile in the presence of acetonitrile was also achieved. polyvinylpolypyrrolidone-Boron Trifluoride complex shows non-corrosive and stable solid catalyst elevated Lewis acid property.
George A. Olah - One of the best experts on this subject based on the ideXlab platform.
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Boron Trifluoride monohydrate, a highly efficient catalyst for thioacetalrzation [1]
Catalysis Letters, 1992Co-Authors: George A. Olah, Qi Wang, G. K. Surya PrakashAbstract:Boron Trifluoride monohydrate, an inexpensive superacid, was found to be an efficient catalyst for thioacetalization.
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Aromatic nitration with potassium nitrate or nitric acid and Boron Trifluoride monohydrate
Synthesis, 1992Co-Authors: George A. Olah, Qi Wang, Imre BucsiAbstract:Potassium nitrate/Boron Trifluoride monohydrate and nitric acid/Boron Trifluoride monohydrate have been found to be efficient reagents for the nitration of aromatic compounds. Benzene and a series of substituted benzenes were nitrated with excellent yields
J Alonso - One of the best experts on this subject based on the ideXlab platform.
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Boron Trifluoride methanol complex mild and powerful reagent for deprotection of labile acetylated amines
Tetrahedron Letters, 2003Co-Authors: Serguei Miltsov, Laia Rivera, Cristina Encinas, J AlonsoAbstract:A set of amino-group possessing cyanine dyes is obtained from their N-acetyl derivatives via deprotection with Boron Trifluoride–methanol complex in good yields.
Qi Wang - One of the best experts on this subject based on the ideXlab platform.
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Boron Trifluoride monohydrate, a highly efficient catalyst for thioacetalrzation [1]
Catalysis Letters, 1992Co-Authors: George A. Olah, Qi Wang, G. K. Surya PrakashAbstract:Boron Trifluoride monohydrate, an inexpensive superacid, was found to be an efficient catalyst for thioacetalization.
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Aromatic nitration with potassium nitrate or nitric acid and Boron Trifluoride monohydrate
Synthesis, 1992Co-Authors: George A. Olah, Qi Wang, Imre BucsiAbstract:Potassium nitrate/Boron Trifluoride monohydrate and nitric acid/Boron Trifluoride monohydrate have been found to be efficient reagents for the nitration of aromatic compounds. Benzene and a series of substituted benzenes were nitrated with excellent yields