mercury T=110°C; P=0.01 Torr; 1 h; Irradiation;

hydrogenchloride; triethylsilane; 1-hydroxy-2(1H)-pyridinethione; di-tert-butyl peroxide; 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;