Synthesis, Characterisation, and Organocatalytic Activity of Chiral Tetrathiahelicene Diphosphine Oxides
作者:Silvia Cauteruccio、Davide Dova、Maurizio Benaglia、Andrea Genoni、Manuel Orlandi、Emanuela Licandro
DOI:10.1002/ejoc.201301912
日期:2014.5
and (±)-2c, bearing two substituents on the phosphorus atoms with different steric and electronic properties, have been synthesised and fully characterised by means of analytical and spectroscopic techniques. The resolution of (±)-2a–c into their antipodes was accomplished by HPLC separation on a chiral stationary phase, and their chiroptical properties were investigated by CD spectroscopy. The behaviour
合成了两种新的手性四硫杂[7]螺旋烯 (7-TH) 基叔氧化膦 (±)-2b 和 (±)-2c,它们在磷原子上带有两个具有不同空间和电子性质的取代基,并完全表征为分析和光谱技术的手段。将 (±)-2a-c 拆分为它们的对映体是通过在手性固定相上进行 HPLC 分离来实现的,并且通过 CD 光谱研究了它们的手性光学特性。在由三氯或四氯硅烷介导的代表性反应中评估了 2a-c 作为有机催化剂的行为。7-TH 基氧化膦 2a 和 2b 以良好的化学产率和非对映选择性促进了酮亚胺还原和立体选择性碳-碳键的形成,尽管对映选择性较低,