The transannular oxidative cyclization of cycloalkenols is a useful synthetic method for the intramolecular syn alkoxyhydroxylation of an alkene, a transformation for which there is presently no alternative procedure. Under the influence of certain high-valent chromium reagents, a cycloalkene substrate
![1,5-dimethyl-9-oxabicyclo[6.1.0]non-4-ene结构式](https://image.chemsrc.com/caspic/142/56031-79-9.png)