Copper-Catalyzed Enantioselective β-Boration of Acyclic Enones
作者:Hak-Suk Sim、Xinhui Feng、Jaesook Yun
DOI:10.1002/chem.200802150
日期:2009.2.9
Josi or Mandy? Asymmetric conjugate addition of diboron to acyclicenones catalyzed by copper affords chiral organoboronates that possess a boronate group at the β stereocenter with excellent chemical yields and enantioselectivities (see scheme). This method accommodates the structural variation of acyclicenones and provides access to highly functionalized chiral organoboronates in one step.
Synthesis of fluorine-substituted [2.2]paracyclophane-based carbene precursors for copper-catalyzed enantioselective boration of α,β-unsaturated ketones
作者:Linyong Wang、Meng Ye、Lei Wang、Wenzeng Duan、Chun Song、Yudao Ma
DOI:10.1016/j.tetasy.2016.12.005
日期:2017.1
Fluorine-substituted [2.2]paracyclophane-based carbene precursors have been successfully synthesized and applied to copper-catalyzed asymmetric beta-boration of alpha,beta-unsaturated ketones. Fluorination of the planar chiral carbenes has a beneficial impact on the catalytic performance of the relevant complexes. A variety of chiral beta-boryl ketones were obtained in excellent yields (up to 99%) and with high enantioselectivities (up to 99% ee). (C) 2016 Elsevier Ltd. All rights reserved.