coordination, and thus poor stereo‐induction would result. The successful enantioselective hydroalkynylation of this type of system has sporadically been reported. We herein describe our progress for the example of vinyl‐substituted norbornadiene derivatives. With the aid of an iridium complex in combination with the chiral SYNPHOS ligand, the addition products could be obtained smoothly with excellent enantioselectivities
此更新描述了对映选择性加成终端炔基的C 跨越非极性CC双键H键。立体拥挤的底物通常在这类反应中具有挑战性,因为这些烯基底物显示出较差的底物-
金属中心配位,因此会导致不良的立体感应。零星地报道了这种类型系统成功的对映选择性加氢烷基化反应。在此,我们以
乙烯基取代的降
冰片二烯衍
生物为例描述我们的进展。借助于
铱配合物与手性SYNPHOS
配体的结合,可以顺利获得具有优异对映选择性(最高99%ee)的加成产物。特别地,炔C的第一实施例还公开了跨氮杂降
冰片二烯的H键加成。