H<sub>5</sub>IO<sub>6</sub>/KI: A New Combination Reagent for Iodination of Aromatic Amines, and Trimethylsilylation of Alcohols and Phenols through<i>in situ</i>Generation of Iodine under Mild Conditions
作者:Mohammad Ali Zolfigol、Ardeshir Khazaei、Eskandar Kolvari、Nadiya Koukabi、Hamid Soltani、Maryam Behjunia
DOI:10.1002/hlca.200900259
日期:2010.3
A simple method for the in situ generation of iodine using H5IO6/KI has been developed, and its application in silylation of OH group and iodination of aromatic amines is described.
Preparation of Silica Supported Tin Chloride: As a Recyclable Catalyst for the Silylation of Hydroxyl Groups with HMDS
作者:Khodabakhsh Niknam、Mohammad Ali Zolfigol、Dariush Saberi、Hajar Molaee
DOI:10.1002/jccs.200900181
日期:2009.12
Silica‐supportedtinchloride [SiO2‐Sn(Cl)4‐n] has been prepared by mixing tinchloride with activated silica gel in toluene under refluxing conditions for one day. A range of primary, secondary, and tertiary alcohols as well as phenolic hydroxylgroups were converted into their corresponding trimethylsilyl ethers with hexamethyldisilazane in the presence of catalytic amounts of silica‐supported tin
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
作者:Eskandar Kolvari、Ardeshir Khazaei、Mohammad Ali Zolfigol、Nadiya Koukabi、Maryam Gilandoust、Neda Bakhit
DOI:10.1007/s12039-011-0120-5
日期:2011.9
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.
A new crystal engineering approach for the synthesis of {[K.18-Crown-6]I3}n as a nanotube-Like and recyclable catalyst for the chemoselective silylation of alcohols
作者:M. A. Zolfigol、E. Kolvari、N. Koukabi、S. Salehzadeh、G. Chehardoli、I. S. Tidmarsh、K. Niknam
DOI:10.1007/bf03249082
日期:2011.6
Reaction of 18-crown-6 with KI in ethanol solution followed by addition of iodine (I-2) afforded a unique triiodide salt with a nanotube-like structure ([K.18-Crown-6]I-3}(n)). It is shown that this reagent may be used for the chemoselective trimethylsilylation of alcohols. The synthesis of the crystalline reagent is a good example of crystal engineering. Reagent was recycled and reused.