Hydroxyl units feature with versatile reactivities in organic synthesis, supported by a rich methodological toolbox that encompasses oxidative, redox-neutral, and reductive trans-formations, etc. There is no doubt that the direct incorporation of hydroxyl group and another chemo-active group into carbon-carbon double bond presents a high-step economic strategy to access high-valuable functionalized alcohols. In this context, although the hydration of alkenes with H 2 O to regioselectively assemble primary and secondary alcohols by Lewis acid-and transition metal-catalysis, has been well-established, the hydroxylation-based difunctionalization of alkenes remains a signficant challenge 11 . To date, the existing breakthrough in this field was typically limited to metal oxide-and nitroarene-mediated alkene dihydroxylation to produce 1,2-diols. There is enormous chemical space remaining to be explored to enable different hydroxylfunctionalization of alkenes.