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[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
Published on: May 21, 2019
Step Cyclization to Give Part Belt Oxygen-Functionalized Pillar[6,10]arenes
Weijian Xue1, Yuhang Liu1, Huiqian Li1
1Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Technology Innovation Center of Industrial Hemp for State Market Regulation, Institute of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China.
Abstract:
Part belt oxygen-functionalized pillar[6,10]arenes are synthesized by step cyclization. An oxygen-substituted tetramer and hexamer have been prepared to construct the O3 pillar[6]arene 4 via a hexamer cyclization reaction and the O6 pillar[10]arene 7 through a [4 + 1+4 + 1] cyclization reaction. X-ray crystallographic studies reveal that both macrocycles have a large cavity and indicate that the part belt oxygen-functionalized pillar[6,10]arenes have both similar cyclic structures and certain differences in configuration compared to pillararene. A variable-temperature 1H NMR experiment also demonstrated the structure differences between O3 pillar[6]arene 4 and traditional pillararene.
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