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Proximally dietherified calix[4]arene at lower rim was selectively nitrated to give mononitrocalix[4]arene, dinitrocalix[4] arene, and trinitrocalix[4]arene, respectively, under different reaction conditions. These three nitrocalix[4]arenes could be purified in good yield just by recrystallization, which provided a concise approach to inherently chiral calixarene. It was disclosed by crystal structure...
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