Enantioselective Dihydroxylation of Alkenes Catalyzed by 1, 4‐Bis(9‐O‐dihydroquinidinyl)phthalazine‐Modified Binaphthyl–Osmium Nanoparticles. Issue 8 (27th December 2017) - Zhu, Jie
Abstract: A series of unprecedented binaphthyl–osmium nanoparticles (OsNPs) with chiral modifiers were applied in the heterogeneous asymmetric dihydroxylation of alkenes. A remarkable size effect of the OsNPs, depending on the density of the covalent organic shells, on the reactivity and enantioselectivity of the dihydroxylation reaction was revealed. Successful recycling of the OsNPs was also demonstrated and high reaction efficiency and enantioselectivity were maintained. Abstract : Binaphthyl–osmium nanoparticles : The first enantioselective dihydroxylation of alkenes is achieved by using novel 1, 4‐bis(9‐ O ‐dihydroquinidinyl)phthalazine [(DHQD)2 PHAL]‐modified binaphthyl–osmium nanoparticles (OsNPs). These nanoparticles are also demonstrated to have a shell‐density effect and can be recycled.