Radical-Induced Formation of Some Siloles and Diazasiloles
journal contributionposted on 19.11.2002, 00:00 by Bangwei Ding, Zhu Teng, Reinhart Keese
The Bu3Sn 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.