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Ardeshir Khazaei - One of the best experts on this subject based on the ideXlab platform.
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rapid and highly efficient trimethylsilylation of alcohols and phenols with Hexamethyldisilazane hmds catalysed by in situ generated i 2 using oxone ki or cerium ammonium nitrate can ki systems under mild conditions
Journal of Chemical Sciences, 2011Co-Authors: Eskandar Kolvari, Ardeshir Khazaei, Mohammad Ali Zolfigol, Nadiya Koukabi, Maryam Gilandoust, Neda BakhitAbstract:Structurally diverse alcohols and phenols were trimethylsilylated in clean and efficient reactions with Hexamethyldisilazane (HMDS) in the presence of a catalytic amount of I2 generated in situ from Oxone®/KI or CAN/KI systems. The reactions occur rapidly in good to high yields in wet CH2Cl2 at room temperature.
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p toluenesulfonyl chloride p tscl catalyzed trimethylsilylation of hydroxyl groups using Hexamethyldisilazane and their regeneration under mild conditions the first example for catalytic application of p toluenesulfonyl chloride
Phosphorus Sulfur and Silicon and The Related Elements, 2009Co-Authors: Ardeshir Khazaei, Amin Rostami, Fatemeh MantashloAbstract:The first catalytic application of p-toluenesulfonyl chloride (p-TsCl) for the efficient and selective trimethylsilylation of various types of hydroxyl groups with Hexamethyldisilazane (HMDS) in dichloromethane and desilylation of these compounds in water is reported. The reactions were carried out at room temperature and were found to proceed in good to excellent yields.
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novel and highly effective method for the trimethylsilylation of alcohols and phenols with Hexamethyldisilazane hmds catalyzed by i2 generated in situ using fe no3 3 9 h2o nai under heterogeneous and neutral conditions
Helvetica Chimica Acta, 2009Co-Authors: Ardeshir Khazaei, Sadegh Rahmati, Amin RostamiAbstract:Structurally diverse alcohols and phenols were trimethylsilylated in a clean and efficient reaction with Hexamethyldisilazane (HMDS) based on the use of I2 generated in situ from Fe(NO3)3⋅9 H2O/NaI. The reaction occurs very rapid in good-to-high yield in CH2Cl2 at room temperature, and the use of toxic and corrosive molecular I2 is avoided.
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n bromosuccinimide nbs selective and effective catalyst for trimethylsilylation of alcohols and phenols using Hexamethyldisilazane and their regeneration under mild and neutral reaction conditions
Canadian Journal of Chemistry, 2007Co-Authors: Ardeshir Khazaei, Amin Rostami, Ayeh Raiatzadeh, Marjan MahboubifarAbstract:Structurally diverse alcohols and phenols were trimethylsilylated in a clean and efficient reaction with Hexamethyldisilazane (HMDS) based on the use of a catalytic amount of N-bromosuccinimide under both dichloromethane and solvent-free conditions at room temperature. Deprotection of trimethylsilyl ethers was also be achieved efficiently in the presence of a catalytic amount of NBS in methanol at ambient temperature.Key words: N-bromosuccinimide, solvent-free, alcohols, phenols, Hexamethyldisilazane, trimethylsilyl ether, catalyst, detrimethylsilylation.
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N-Bromosuccinimide (NBS) — Selective and effective catalyst for trimethylsilylation of alcohols and phenols using Hexamethyldisilazane and their regeneration under mild and neutral reaction conditions
Canadian Journal of Chemistry, 2007Co-Authors: Ardeshir Khazaei, Amin Rostami, Ayeh Raiatzadeh, Marjan MahboubifarAbstract:Structurally diverse alcohols and phenols were trimethylsilylated in a clean and efficient reaction with Hexamethyldisilazane (HMDS) based on the use of a catalytic amount of N-bromosuccinimide under both dichloromethane and solvent-free conditions at room temperature. Deprotection of trimethylsilyl ethers was also be achieved efficiently in the presence of a catalytic amount of NBS in methanol at ambient temperature.Key words: N-bromosuccinimide, solvent-free, alcohols, phenols, Hexamethyldisilazane, trimethylsilyl ether, catalyst, detrimethylsilylation.
Takeshi Toru - One of the best experts on this subject based on the ideXlab platform.
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the synthesis of metal free phthalocyanines from phthalonitriles with Hexamethyldisilazane
Bulletin of the Chemical Society of Japan, 2004Co-Authors: Hitoshi Uchida, Hideyuki Yoshiyama, Paidi Yella Reddy, Shuichi Nakamura, Takeshi ToruAbstract:Metal-free phthalocyanines were prepared in good yields by heating phthalonitriles with Hexamethyldisilazane, (NH 4 ) 2 SO 4 , and DMF. Good yields of metal-free phthalocyanines involving peripherally substituted phthalocyanines were attained with a catalytic amount of Hexamethyldisilazane. Naphthalocyamine was also prepared. Additional additives were examined to accelerate the formation of the phthalocyanine framework.
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Solvent-Free Efficient Synthesis of 2,4,5-Triarylimidazolines from Aromatic Aldehydes and Hexamethyldisilazane
Synthesis, 2003Co-Authors: Hitoshi Uchida, Paidi Yella Reddy, Shuichi Nakamura, Takashi Shimizu, Takeshi ToruAbstract:A one-step preparation of 2,4,5-triarylimidazolines from aromatic aldehydes was accomplished by heating with Hexamethyldisilazane under solvent-free conditions. This reaction provides a convenient preparative method for triarylimidazolines having a variety of aryl groups.
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Novel Synthesis of Metal-Free Phthalocyanines from Phthalimides and Phthalic Anhydrides with Hexamethyldisilazane
Synlett, 2003Co-Authors: Hitoshi Uchida, Hideyuki Yoshiyama, Paidi Yella Reddy, Shuichi Nakamura, Takeshi ToruAbstract:Metal-free phthalocyanines and their peripherally substituted derivatives have been synthesized from unsubstituted and substituted phthalimides, phthalic anhydrides, and naphthalimide on heating with Hexamethyldisilazane under mild conditions.
Mohammad Ali Zolfigol - One of the best experts on this subject based on the ideXlab platform.
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rapid and highly efficient trimethylsilylation of alcohols and phenols with Hexamethyldisilazane hmds catalysed by in situ generated i 2 using oxone ki or cerium ammonium nitrate can ki systems under mild conditions
Journal of Chemical Sciences, 2011Co-Authors: Eskandar Kolvari, Ardeshir Khazaei, Mohammad Ali Zolfigol, Nadiya Koukabi, Maryam Gilandoust, Neda BakhitAbstract:Structurally diverse alcohols and phenols were trimethylsilylated in clean and efficient reactions with Hexamethyldisilazane (HMDS) in the presence of a catalytic amount of I2 generated in situ from Oxone®/KI or CAN/KI systems. The reactions occur rapidly in good to high yields in wet CH2Cl2 at room temperature.
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Protection of hydroxy groups as trimethylsilyl ethers using 1,1,1,3,3,3-Hexamethyldisilazane (HMDS) catalyzed by poly(4-vinylpyridinium tribromide)
Collection of Czechoslovak Chemical Communications, 2010Co-Authors: Arash Ghorbani-choghamarani, Mohammad Ali Zolfigol, Maryam Hajjami, Khorshid Darvishi, Laleh GholamniaAbstract:A very efficient procedure for the protection of alcohols and phenols is presented. The mixture of 1,1,1,3,3,3-Hexamethyldisilazane (HMDS) and catalytic amounts of poly(4-vinylpyridinium tribromide) was found to be effective for the trimethylsilylation of alcohols and phenols. Protection reaction is very simple and performs heterogeneously in acetonitrile at room temperature under mild conditions.
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1 3 dichloro 5 5 dimethylhydantoin dch and trichloromelamine tcm as efficient catalysts for the chemoselective trimethylsilylation of hydroxyl group with 1 1 1 3 3 3 Hexamethyldisilazane hmds under mild conditions
Journal of The Chinese Chemical Society, 2009Co-Authors: Arash Ghorbanichoghamarani, Kamal Amani, Mohammad Ali Zolfigol, Maryam Hajjami, Roia AyazinasrabadiAbstract:A highly convenient method for the trimethylsilylation of alcohols and phenols via treatment by Hexamethyldisilazane in the presence of 1,3-dichloro-5,5-dimethylhydantoin(DCH) and/or trichloromelamine (TCM) as a catalyst has been developed. A wide variety of hydroxyl groups were selectively protected in CH2Cl2/CH3CN under mild conditions.
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Trimethylsilylation of Hydroxyl Group with 1,1,1,3,3,3-Hexamethyldisilazane (HMDS) Catalyzed by Tribromomelamine (TBM)
Journal of the Chinese Chemical Society, 2008Co-Authors: Arash Ghorbani-choghamarani, Mohammad Ali Zolfigol, Maryam Hajjami, Shila JafariAbstract:Tribromomelamine (TBM) can be used as a novel catalyst for the trimethylsilylation of alcohols and phenols with 1,1,1,3,3,3-Hexamethyldisilazane (HMDS). A wide variety of hydroxyl groups were selectively protected in CH 2 Cl 2 /CH 3 CN under mild conditions.
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Tribromoisocyanuric Acid and DABCO-Br as Efficient Catalysts for the Silylation of Hydroxyl Groups with Hexamethyldisilazane
Chinese Journal of Catalysis, 2008Co-Authors: Khodabakhsh Niknam, Mohammad Ali Zolfigol, Gholamabbas Chehardoli, Mina DehghanianAbstract:Abstract Many primary, secondary, tertiary alcohols, and phenolic hydroxyl groups were effectively converted to their corresponding trimethylsilyl ethers using Hexamethyldisilazane in the presence of catalytic amounts of tribromoisocyanuric acid and DABCO-bromine under mild conditions at room temperature with short reaction times in good to excellent yields. Excellent chemoselective silylation of hydroxyl groups in the presence of other functional groups were also observed.
Mohammad R Saidi - One of the best experts on this subject based on the ideXlab platform.
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Novel and Efficient Method for the Silylation of Hydroxyl Groups with Hexamethyldisilazane (HMDS) under Solvent-Free and Neutral Conditions
Organometallics, 2004Co-Authors: Najmedin Azizi, Mohammad R SaidiAbstract:Various alcohols and phenols were silylated to trimethylsilyl ethers with Hexamethyldisilazane in the presence of solid lithium perchlorate under very mild, neutral, and solvent-free conditions in good to excellent yields.
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Lithium Perchlorate Mediated Three-Component Preparation of Primary Aminoesters
Molecules, 2002Co-Authors: Mohammad R Saidi, Najmoddin AziziAbstract:A three-component reaction between an aldehyde, metallated Hexamethyldisilazane and a functionalized organozinc compound proceeded smoothly in the presence of LiClO4 in diethyl ether to afford primary amino esters in good yields.
Yousef Fazli - One of the best experts on this subject based on the ideXlab platform.
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Activators Regenerated by Electron Transfer for Atom Transfer Radical Polymerization of Styrene in the Presence of Hydrophobically Modified Silica Aerogel Nanoparticles
Zeitschrift für Physikalische Chemie, 2016Co-Authors: Khezrollah Khezri, Hassan Alijani, Yousef FazliAbstract:AbstractPristine hydrophilic silica aerogel nanoparticles surface was functionalized with Hexamethyldisilazane (HMDS). Then, the resultant modified nanoparticles were used for