Thermal Addition Reaction of Aroylketene with 1-Aryl-1-trimethylsilyloxyethylenes: Aromatic Substituent Effects of Aroylketene and Aryltrimethylsilyloxyethylene on Their Reactivity.
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
作者:Arash Ghorbani-Choghamarani、Kamal Amani、Mohammad Ali Zolfigol、Maryam Hajjami、Roia Ayazi-Nasrabadi
DOI:10.1002/jccs.200900037
日期:2009.4
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 hydroxylgroups were selectively protected in CH2Cl2/CH3CN undermildconditions.
A Mild and Efficient Method for Chemoselective Silylation of Alcohols Using Hexamethyldisilazane in the Presence of Silica Chloride
作者:Farhad Shirini、Mohammad Ali Zolfigol、Kamal Mohammadi
DOI:10.1080/10426500307866
日期:2003.7
Reaction of alcohols with hexamethyldisilazane in the presence of silica chloride provides efficiently the corresponding trimethylsilyl ethers. This system discriminates absolutely amines and thiols from alcohols.
Trimethylsilylation of Hydroxyl Group with 1,1,1,3,3,3-Hexamethyldisilazane (HMDS) Catalyzed by Tribromomelamine (TBM)
作者:Arash Ghorbani-Choghamarani、Mohammad Ali Zolfigol、Maryam Hajjami、Shila Jafari
DOI:10.1002/jccs.200800180
日期:2008.12
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 hydroxylgroups were selectively protected in CH 2 Cl 2 /CH 3 CN undermildconditions.
Tungstophosphoric acid (H3PW12O40) as a heterogeneous inorganic catalyst. Activation of hexamethyldisilazane (HMDS) by tungstophosphoric acid for efficient and selective solvent-free O-silylation reactions
Tungstophosphoric acid (H3PW12O40) effectively activates hexamethyldisilazane for the selective silylation of primary, secondary, tertiary and phenolic hydroxy groups under solvent-free conditions at 55–60 °C.
Addition of trimethylsilyl cyanide to aromatic ketones promoted by organic solutions of lithium salts
作者:Gérard Jenner
DOI:10.1016/s0040-4039(98)02419-8
日期:1999.1
Cyanosilylation of aromatic ketones is strongly promoted in organic solutions of specific lithiumsalts (perchlorate and tetrafluoroborate). Acetonitrile solutions of LiBF4 are safe and efficient media for this reaction.