Development of Chiral Organosuperbase Catalysts Consisting of Two Different Organobase Functionalities
作者:Azusa Kondoh、Masafumi Oishi、Hikaru Tezuka、Masahiro Terada
DOI:10.1002/anie.202001419
日期:2020.5.4
In the field of chiral Brønsted base catalysis, a new generation of chiral catalysts has been highly anticipated to overcome the intrinsic limitation of pronucleophiles that are applicable to the enantioselective reactions. Herein, we reveal conceptually new chiral Brønsted base catalysts consisting of two different organobase functionalities, one of which functions as an organosuperbase and the other
在手性布朗斯台德碱催化领域中,已经高度期待新一代手性催化剂能够克服可用于对映选择性反应的亲核试剂的固有局限性。本文中,我们从概念上揭示了由两种不同的有机碱官能度组成的新型手性布朗斯台德碱催化剂,其中一种用作有机超强碱,另一种用作底物识别位点。它们的显着活性来自于单个催化剂分子中两个有机碱的独特协同作用,这在酸性较低的亲核试剂α-苯硫基乙酸的前所未有的对映选择性直接曼尼希型反应中得到了证明。