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王乐勇
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期刊论文
Unprecedented synthesis of chiral calix[4](aza)crowns and its potent encapsulating methanol
Sci China Ser B-Chem, Apr. 2009, vol. 52, no.4, 497-504，-0001，（）：
Unprecedented synthesis of chiral (aza)crown ethers of calix[4]arene derivatives bearing a carboxyl amide bridge was described. The synthesis proceeds through condensation of the corresponding dinitriles with optically active 1,2-aminoalcohols, and is catalyzed by the ZnCl2 Lewis acid at elevated temperature in a very efficient one-pot process. The cavity of calix[4](aza)crowns can encapsulate methanol molecules by O-H· · ·π interaction, which has been confirmed by X-ray crystal structures and ESI-MS.
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