Abstract
The photolysis of 1-methyl-1-(trimethylsilyl)dibenzosilole (I) and 1-phenyl-1-(trimethylsilyl)dibenzosilole (II) has been investigated. Irradiation of I in the presence of acetone afforded 1-isopropoxy-1-methyl-2-(trimethylsilyl)dibenzosilole(III), while in the presence of isobutene, I afforded 1-isobutyl-1-methyl-2-(trimethylsilyl)dibenzosilole (V). The photolysis of II in the presence of acetone or isobutene gave the rearranged addition products analogous to III and V. Irradiation of I in alcohols such as methyl alcohol, ethyl alcohol and isopropyl alcohol, produced 1-hydro-1-methyldibenzosilole (VII) in high yield. Similarly, irradiation of II in methyl alcohol or ethyl alcohol gave 1-hydro-1-phenyldibenzosilole in high yield.
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