期刊
TETRAHEDRON
卷 60, 期 50, 页码 11613-11618出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2004.09.047
关键词
water soluble calixarenes; macrocycles; DNA recognition; cytotoxicity
The reaction of O-alkylated p-aminocalix[n]arenes (n=4, 6, 8) with N,N'-di(tert-butoxycarbonyl)thiourea in the presence of HgCl, and subsequent removal of the protective groups with hydrochloric acid led to the new water soluble calix[n]guanidinium derivatives (p-guanidiniumcalix[n]arenes) 20-23. With the exception of tetraoctyl-p-guanidiniumcalix[4]arene 21, which forms a macroscopic gelatinous aggregate even at very low concentration, all the synthesised guanidinium calixarenes show good solubility in water and sharp NMR signals. Moreover, these compounds are not cytotoxic and bind to plasmid DNA. (C) 2004 Elsevier Ltd. All rights reserved.
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