Synthesis and complexing properties of macrocycles incorporating 2, 2'-biindazolyl binding subunits

…, J De Mendoza, P Prados

Index: Cuevas, Juan C.; Mendoza, Javier de; Prados, Pilar Journal of Organic Chemistry, 1988 , vol. 53, # 9 p. 2055 - 2066

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Citation Number: 31

Abstract

Substituted 2, 2'-biindazoles 4 and 19-23 were prepared in W90% yields by thermal decomposition of o, o'-diazido azines 13-18, which in turn were readily obtained from the corresponding 2-azidobenzaldehydes or 2-azidobenzophenones. The preference of these N, N'-linked azolyl dimers for an almost orthogonal conformation was clearly demonstrated by the strong deshielding of the H-3 signal in'H NMR spectra. Appropriate substituted ...