Synthesis of 11-<i>cis</i>-Retinoids by Hydrosilylation-Protodesilylation of an 11,12-Didehydro Precursor: Easy Access to 11- and 12-Mono- and 11,12-Dideuteroretinoids
An expeditious, highly efficient approach to 11‐cis‐retinoids was achieved by semihydrogenation of a readily available 11‐yne precursor through a hydrosilylation–protodesilylation protocol. The complete chemo‐, regio‐, and syn‐stereoselectivity of the method also allowed direct access to 11‐ and 12‐monodeutero‐, and 11,12‐dideutero‐11‐cis‐retinoids. The analogous trans series was not accessible by