Author/Authors :
Lhot?k، نويسنده , , Pavel and Mor?vek، نويسنده , , Ji??́ and ?mejkal، نويسنده , , Tom?? and Stibor، نويسنده , , Ivan and Sykora، نويسنده , , Jan، نويسنده ,
Abstract :
A series of alkyl substituted thiacalix[4]arene derivatives (being conformationally mobile or immobilised in the cone conformation) was used as the starting point for this study. It was demonstrated that the NaNO3/CF3COOH system can serve as an excellent oxidising agent. The oxidation of the bridging sulphur atoms smoothly leads to the corresponding tetrasulfoxides where alkyl and sulfoxide groups are oriented in the opposite directions in a stereoselective manner.
