Rapid access to highly functionalized alkylidene cyclohexanols through a one-pot desymmetrizing hydroformylation/carbonyl enecyclization starting from simple bisalkenylcarbinols is reported. Mechanistic insight into the carbonyl ene reaction is given, highlighting the importance of hyperconjugative substituent effects.
catalytic system for asymmetricdihydroxylation (AD)-based desymmetrization. The lone-pair−π interaction between the C9 carbonyl in mono-cinchona alkaloids and the electron-deficient phthalazine in the symmetric alkene substrates was exploited to realize a highly efficient AD-based desymmetrization, which was difficult to execute following the traditional Sharplessasymmetricdihydroxylation method.