Indium Trifluoromethanesulfonate as a Mild and Chemoselective Catalyst for the Conversion of Carbonyl Compounds into 1,3-Oxathiolanes
作者:Tsuneo Sato、Kiyoshi Kazahaya、Nao Hamada、Shinya Ito
DOI:10.1055/s-2002-33541
日期:——
An efficient method for the preparation of 1,3-oxathiolanes from aldehydes and ketones with 2-mercaptoethanol in the presence of a catalytic amount of indium trifluoromethanesulfonate is reported.
Chemoselective Deprotection Of 1,3-Oxathiolanes Using Amberlyst 15 and Glyoxylic Acid under Solvent Free Conditions
作者:Subhash P. Chavan、Priti Soni、Subhash K. Kamat
DOI:10.1055/s-2001-16045
日期:——
Carbonyl compounds were regenerated from corresponding 1,3-oxathiolanes via equilibrium exchange with glyoxylic acid and Amberlyst 15 as the heterogeneous catalyst, under solvent free conditions.
Silica Gel-Supported Polyphosphoric Acid (PPA/SiO<sub>2</sub>) as an Efficient and Reusable Catalyst for Conversion of Carbonyl Compounds into Oxathioacetals and Dithioacetals
作者:Tadashi Aoyama、Toshio Takido、Mitsuo Kodomari
DOI:10.1055/s-2004-832812
日期:——
A simple and efficient method for the conversion of carbonyl compounds to oxathioacetals and dithioacetals by using polyphosphoric acid supported on silica gel (PPA/SiO2) as an acid catalyst have been developed. PPA/SiO2 is easily recovered from the reaction mixture and reused without a decrease in catalytic activity.
Microwave-mediated Efficient Protection of Carbonyl Compounds as 1,3-Oxathiolanes in the Presence of Iodine under Solvent Free Condition
作者:Ghanashyam Bez、Nabajyoti Baruah
DOI:10.1246/cl.2006.542
日期:2006.5
A mild, efficient, and solvent free protocol for conversion of aldehydes and ketones into their corresponding 1,3-oxathiolanes using 2-mercaptoethanol in the presence of catalytic amount of elemental iodine is reported.
Iron(III) Fluoride: A Highly Efficient and Versatile Catalyst for the Protection of Carbonyl Compounds under Solvent-Free Conditions
作者:Babasaheb P. Bandgar、Vinod T. Kamble、Ashwini Kulkarni
DOI:10.1071/ch05067
日期:——
Carbonylcompounds are successfully converted into oxathioacetals and dithioacetals with 2-mercaptoethanol and ethane-1,2-dithiol using a catalytic amount of iron(iii) fluoride under solvent-free conditions. The catalysts were recovered and reused in various runs without affecting the efficiency of the process.