A new approach to quinone methides is presented, which starts from quinone diazides and thioketones. Together with some model compounds, 1, 3-bisquinone methide cyclobutanes 23, 25, and 37 were synthesized. Reduction with sodium transforms these quinoid compounds into bicyclo [llO] butanes with phenolate groups in the 1, 3-positions. These phenolates can be trapped as silyl ethers 40-43. After hydrolysis, reoxidation to the ...