Vaulted Biaryls in Catalysis: A Structure-Activity Relationship Guided Tour of the Immanent Domain of the VANOL Ligand
作者:Yong Guan、Zhensheng Ding、William D. Wulff
DOI:10.1002/chem.201302451
日期:2013.11.11
anion (boroxinate) that is assembled in situ from three equivalents of B(OPh)3 and one of the VANOL ligand by a molecule of substrate. The substrates are bound to the boroxinate by H bonds to oxygen atoms O1–O3. The effects of introducing substituents at each position of the naphthalene core of the VANOL ligand are systematically investigated in an aziridination reaction. Substituents in the 4,4′‐ and
BOROX 催化剂中的活性位点是一种手性多硼酸阴离子(硼酸),它由三当量的 B(OPh) 3和一个 VANOL 配体通过一分子底物原位组装而成。底物通过与氧原子 O1-O3 的 H 键与硼酸盐结合。在氮丙啶化反应中系统地研究了在 VANOL 配体的萘核的每个位置引入取代基的影响。4,4'-和8,8'-位的取代基对催化剂性能有负面影响,而7-和7'-位的取代基在正向影响最大。