Radical-induced formation of some siloles and diazasiloles.
The Bu(3)Sn radical-induced reaction of o-iodobenzylvinylsilanes and o-iodoallylsilanes leads to cyclic products in yields of 40-60%. These regioselective cyclizations occur with high preference for a 5-exo and a 7-endo mode with a 6-exo mode being absent. An example for ring closure via a 7-exo mode is described.
Ding
Bangwei
B
Department of Chemistry & Biochemistry, University of Bern, Switzerland.
Teng
Zhu
Z
Keese
Reinhart
R