triethylsilane; di-tert-butyl peroxide T=200°C; 1.5 h; Irradiation;

hydrogenchloride; 1-hydroxy-2(1H)-pyridinethione; 1,1,1-trifluoro-2-chloro-2-bromoethane; tert.-butyl lithium; 2-fluoro-3,3-dimethyl-2,3-dihydro-1,2-benzisothiazole-1,1-dioxide Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

1: 95 percent / dicyclohexylcarbodiimide / CH2Cl2 / 1.5 h / 5 °C 2: 90 percent / 2-bromo-2-chloro-1,1,1-trifluoroethane, 4-dimethylaminopyridine / 1 h / Heating; Irradiation View Scheme

4-(N,N-dimethlyamino)pyridine; 1,1,1-trifluoro-2-chloro-2-bromoethane 1 h; HeatingIrradiation;

multistep reaction (formation of <1.1.1>propellane by 1,3-dehydrobromination of 1-bromobicyclo<1.1.1>pentane); Mechanism;