作者:Aoife C. Maxwell、Celine Franc、Laurent Pouchain、Helge Müller-Bunz、Patrick J. Guiry
DOI:10.1039/b810936b
日期:——
The synthesis and resolution of electronically varied axially chiral Quinazolinaps is reported. These ligands bear different aryl groups on the donor phosphorus atom and were synthesised as part of our investigations into electronic effects within this ligand class. A diastereomerically pure palladacycle of one ligand was characterised by X-ray crystallography. The application of these Quinazolinaps to the rhodium-catalysed hydroboration of vinylarenes resulted in enantioselectivities of up to 92%. Their application to the palladium-catalysed allylic alkylation of 1,3-diphenylprop-2-enyl acetate resulted in conversions of up to 99% and enantioselectivities of up to 94%.
报告了电子变化的轴向手性喹嗪啉类化合物的合成和分离。这些配体在供体磷原子上具有不同的芳基,并作为我们研究该配体类别中电子效应的一部分进行合成。其中一个配体的对映体纯净的钯环化物通过X射线晶体学进行了表征。这些喹嗪啉在铑催化的烯烃和硼氢化反应中的应用,达到了高达92%的对映选择性。在钯催化的1,3-二苯基丙-2-烯基乙酸酯的亲核烷基化反应中,其应用实现了高达99%的转化率和高达94%的对映选择性。