Synthesis of a <i>C</i><sub>2</sub>-Symmetric Chiral Borinic Acid and Its Application in Catalytic Desymmetrization of 2,2-Disubstituted-1,3-Propanediols
作者:Jian Song、Wen-Hua Zheng
DOI:10.1021/jacs.3c02331
日期:——
synthesis of efficient chiral boronic acids remains a formidable challenge. Herein we disclose a rational design and a concise synthesis of a series of novel C2-symmetric disubstituted boronic acids, or borinic acids. Chiral borinic acids have been found to be excellent agents that can achieve highly enantioselective desymmetrization of 2,2-disubstituted-1,3-propanediols, providing chiral diols with a quaternary
尽管在催化中普遍使用硼酸,但高效手性硼酸的设计和合成仍然是一项艰巨的挑战。在此,我们公开了一系列新型C 2对称双取代硼酸或硼酸的合理设计和简明合成。已发现手性硼酸是一种优秀的试剂,可以实现 2,2-二取代-1,3-丙二醇的高度对映选择性去对称化,从而提供具有季立构中心的手性二醇,这在近年来被认为具有挑战性。该反应可耐受多种底物,提供一系列具有高对映选择性的手性二醇。催化循环中四配位硼酸酯的存在已被11证明B NMR研究,并提出了立体控制模型。