Silicon-carbon unsaturated compounds. 73. Photolysis of cis- and trans-1,2-dimethyl-1,2-diphenyl-1,2-disilacyclohexane in the presence of tert-butyl alcohol and acetone

The photolysis of cis- and trans-1,2-dimethyl-1,2-diphenyl-1,2-disilacyclohexane (1a and 1b) with tert-butyl alcohol proceeded with high stereospecificity to give cis- and trans-addition/elimination product (2a and 2b), while with acetone, 1a and 1b afforded cis- and trans-ene-adduct, respectively.