Aminotellurinylation of Olefins and Its Utilization for Synthesis of 2-Oxazolidinones
Benzenetellurinyl acetate or trifluoroacetate in combination with ethyl carbamate effected regio- and stereoselective aminotellurinylation of olefins in the presence of boron trifluoride etherate in chloroform under reflux to give ethyl carbamates in high yields.Benzenetellurinyl trifluoromethanesulfonate similarly did it even at the lower temperature of refluxing dichloromethane without Lewis acid.This reaction was successfully extended to cyclofunctionalization of olefinic carbamates into nitrogen heterocycles.Furthermore, when the aminotellurinylation was carried out in refluxing 1,2-dichloroethane, 2-oxazolidinone was obtained in a high yield.A mechanism of addition followed by intramolecular substitution in proposed on the basis of the stereochemistry of 2-oxazolidinone derivatives.
Hu, Nan Xing,Aso, Yoshio,Otsubo, Tetsuo,Ogura, Fumio
p. 4398 - 4404
(2007/10/02)
NEW SYNTHETIC REACTIONS USING ARENETELLURINIC ANHYDRIDES
New synthetic reactions utilizing arenetellurinic acid anhydrides are described.The anhydrides proved to be very useful reagents for the transformation of various functional groups.Furthermore they induced various intramolecular cyclofunctionalizations to yield many oxygen and nitrogen heterocycles.
Hu, Nan Xing,Aso, Yoshio,Otsubo, Tetsuo,Ogura, Fumio
p. 177 - 190
(2007/10/02)
Aminotellurinylation of Olefins with Benzenetellurinyl Acetate and Ethyl Carbamate
Benzenetellurinyl acetate or trifluoroacetate in combination with ethyl carbamate effected aminotellurinylation of olefins in chloroform under reflux in the presence of boron trifluoride etherate to give ethyl carbamates in high yi
Hu, Nan Xing,Aso, Yoshio,Otsubo, Tetsuo,Ogura, Fumio
p. 1327 - 1330
(2007/10/02)
More Articles about upstream products of 112476-41-2