1,5-BIS(TRIMETHYLSILOXY)-1,5-DIMETHOXY-1, 4-PENTADIENES PRECURSORS FOR THE SYNTHESIS OF CYCLOPROPANES AND CYCLOBUTANES

Article abstract of DOI:10.1016/S0040-4020(01)88582-3

1,5-Bis(trimethylsiloxy)-1,5-dimethoxy-1,4-pentadienes (7) can be prepared in good yield by silylation of the dianions of dimethyl glutarates (8).On treatment with titanium tetrachloride, 7 cyclise stereoselectively to dimethyl trans-cyclopropane-1,2-dica