Yield given. Multistep reaction;

2,6-di-tert-butyl-pyridine; tris(4-bromophenyl)aminium hexafluoroantimonate in dichloromethane hexachloroantimonate instead of hexafluoroantimonat; or thianthrenium perchlorate; variation of conditions; Product distributionMechanism;

T=25°C; variation of reagent and temperature; Thermodynamic dataRate constant;