Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Chem Commun (Camb). 2013 Sep 25;49(74):8184-6. doi: 10.1039/c3cc44324h.
It was proved that a judicious choice of counteranion played a prominent role in Cu(II) catalysis for enantioselective boron conjugate additions in water; the use of Cu(OH)2 renders heterogeneous catalysis, whereas Cu(OAc)2 renders homogeneous catalysis; cyclic dienones underwent a remarkable switch of regioselectivity between 1,4- and 1,6-modes of the additions through these catalyses.
研究证明，在铜（II）催化的硼共轭加成的对映选择性反应中，选择合适的抗衡阴离子起着重要作用；使用 Cu(OH)2 可实现非均相催化，而使用 Cu(OAc)2 则可实现均相催化；通过这些催化作用，环状二烯酮的加成反应的区域选择性在 1,4-和 1,6-两种模式之间发生了显著的转换。
