Synthesis and properties of purinophanes. Relationship between the magnitude of hypochromism and stacking geometry of purine rings

F Seyama, K Akahori, Y Sakata, S Misumi…

Index: Seyama, F.; Akahori, K.; Sakata, Y.; Misumi, S.; Aida, M.; Nagata, C. Journal of the American Chemical Society, 1988 , vol. 110, # 7 p. 2192 - 2201

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Citation Number: 49

Abstract

Abstract: Twelve purinophanes 1-12, in which two purine rings are fixed with different modes of stacking by two or three polymethylene chains, have been prepared by either stepwise introduction of the linking chains or quasi-dimerization of disubstituted purine derivatives. The five kinds of stacking geometries of the two component rings in the purinophanes were determined by X-ray analysis and/or'H NMR. The interplanar distances vary from 3.2 to 6.6 ...