| Highly stereoselective and regioselective addition was observed upon reaction of nucleophiles with cationic molybdenum ;The synthesis, full characterization, and physical characteristics of the novel compound 4,4;A new class of compounds, bis(stannyl)quinones, were synthesized through the use of cyclobutenedione chemistry. These 2,3-bis(trialkylstannyl)-5,6-disubstituted-1,4-benzoquinones underwent facile mono- or sequential Stille cross-coupling reactions which provided different functionalities on the quinone unit that were previously unavailable. Furthermore, the unsymmetrical, bis(stannyl)quinone, 2-(tricyclohexylstannyl)-3-(trimethylstannyl)6-methyl-5-(1-methylethoxy)-1,4-benzoquinone, was constructed. With sterically different tin moieties, the Stille cross-coupling reaction was selectively favored at the carbon bearing the trimethyltin moiety in a 30:1 ratio. |
