Heterogeneous and homogeneous chiral Cu(ii) catalysis in water: enantioselective boron conjugate additions to dienones and dienoesters
作者:Taku Kitanosono、Pengyu Xu、Shū Kobayashi
DOI:10.1039/c3cc44324h
日期:——
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 Cu(II)催化水中对映选择性硼共轭物加成时,反离子的明智选择发挥了重要作用;使用 Cu(OH)2 可实现异相催化,而 Cu(OAc)2 则可实现均相催化;通过这些催化剂,环二烯酮在 1,4- 和 1,6- 加成模式之间发生了显著的区域选择性转换。