63905-21-5Relevant articles and documents
Diacetoxylation of nonconjugated dienes with TeO2 and the isolation of intermediate organotellurium compounds
Yoshimori, Yasuharu,Cho, Chan Sik,Uemura, Sakae
, p. 55 - 60 (1995)
Tellurium(IV) oxide (TeO2) reacts with nonconjugated dienes in acetic acid at reflux temperature in the presence of lithium halide or iodine to give the corresponding vic-diacetates in moderate yields.When the reaction is carried out at 80 deg C and the reaction mixture is then reduced with aqueous sodium thiosulfate, bis(β-acetoxyalkyl)ditellurides are isolated as main products.Treatment of the ditellurides with refluxing acetic acid affords the corresponding vic-diacetates in good yields.The expected tellurium containing heterocyclic compounds, such as telluracyclopentanes and telluracyclohexanes, are not formed and/or isolated under the conditions employed.When 4-vinylcyclohexene and limonene are used as dienes in the diacetoxylation reaction, aromatic compounds due to the dehydrogenation of cyclohexene ring are also produced in moderate yields. Keywords: Tellurium; Oxidation; Diolefin; Lithium halide; Iodine; Diacetoxylation
Heterogeneous acidic and eco-friendly reagents for mild and convenient conversion of epoxides to 1,2-diacetates
Gilanizadeh, Masumeh,Zeynizadeh, Behzad
, p. 296 - 298 (2016/07/06)
A highly regioselective ring-opening of epoxides with acetic anhydride in the presence of hydrated disodium hydrogen phosphate and sodium hydrogen sulfate as efficient and eco-friendly reagents is described. The reactions are clean and lead to 1,2-diacetates in high to excellent yields.
Direct transformation of epoxides to 1,2-diacetates with Ac2O/B(OH)3 system
Gilanizadeh, Masumeh,Zeynizadeh, Behzad
, p. 1234 - 1238 (2016/01/12)
Direct transformation of different kinds of epoxides to 1,2-diacetates was carried out easily and efficiently with Ac2O/B(OH)3 system. All reactions were carried out under reflux conditions within 2 h to afford 1,2-diacetates in high yields.