Tribenzotriquinacene Receptors for C<sub>60</sub> Fullerene Rotors: Towards<i>C</i><sub>3</sub>Symmetrical Chiral Stators for Unidirectionally Operating Nanoratchets
作者:Björn Bredenkötter、Maciej Grzywa、Mohammad Alaghemandi、Rochus Schmid、Wouter Herrebout、Patrick Bultinck、Dirk Volkmer
DOI:10.1002/chem.201304980
日期:2014.6.25
highly diastereo‐discriminating Diels–Alder reaction of 2,6‐di‐tert‐butylanthracene with fumaric acid di(−)menthyl ester, catalyzed by aluminium chloride, is the relevant stereochemistry introducing step. The structure of the fullerene receptor was verified by 1H and 13C NMR spectroscopy, mass spectrometry and single crystal X‐ray diffraction. VCD and ECD spectra were recorded, which were corroborated by
描述了通过C 2对称的1,2-二酮合成子(5)和六氨基三苯并三喹啉核(6)的三重缩合反应合成具有C 3点群对称性的C 60富勒烯的立体化学纯凹型三苯并三喹并二苯受体(7)。。从C 2 h对称2,6-二叔丁基蒽开始,按五步反应顺序合成了手性二酮。2,6-二的高度非对映判别Diels-Alder反应叔氯化铝催化的叔丁基蒽与富马酸二(-)薄荷基酯是相关的立体化学引入步骤。富勒烯受体的结构已通过1 H和13 C NMR光谱,质谱和单晶X射线衍射验证。VCD和ECD记录光谱,这是由AB证实从头DFT计算,建立的手性性质7与约99.7%ee值,基于所述EE手性合成子(的(99.9%)1)。的绝对构型7因此可以建立为清一色小号[(2-小号,7小号,16小号,21S,30 S,35 S)-(7)]。光谱滴定实验表明,主体与纯富勒烯(C 60)或富勒烯衍生物,例如转子1'-(4-硝基苯基)-3'-(4- N