Cyclization and ring-expansion reactions involving reductive formation and oxidative ring-opening of cyclopropanol derivatives

FeCl3-promoted regioselective ring-opening reactions of cyc lopropyl trimethylsilyl ethers, obtained by SMI2 reduction c followed by silylation with Me3SiCl of bromoalkyl ketones and acyl chloride, were performed. Eventually, the sequential reduction and oxidation reactions starting from bromoalkyl ketones to give ring-expanded enones were achieved in one-pot.