Synthesis and properties of diethyl 5,10-dihetera-5,10-dihydroindeno[2,1-a]indene-2,7-dicarboxylates
摘要:
A series of six heterocyclic diesters lb-6b containing all combinations of nitrogen, sulfur, and selenium has been prepared from a common precursor, diethyl 2,2'-dinitrostilbene-4,4'-dicarboxylate. Electrochemical analysis showed oxidation potential increases in the order N < Se < S, and the same trend was observed for maxima of UV absorbance. Electrochemical oxidation of indoloindole lb (but not the other members of the series) generates a persistent radical cation whose properties were investigated. Diesters containing sulfur and selenium (but not nitrogen) form S(A) liquid crystals. A new synthetic method leading to the indolo[1,2-b]indazole ring system has been found.
CRAM, D. J.;KATZ, H. E.;DICKER, I. B., J. AMER. CHEM. SOC., 1984, 106, N 17, 4987-5000
作者:CRAM, D. J.、KATZ, H. E.、DICKER, I. B.
DOI:——
日期:——
Cation complexing properties of synthetic macrocyclic polyether-diester ligands containing the pyridine subcyclic unit
作者:J. S. Bradshaw、G. E. Maas、J. D. Lamb、R. M. Izatt、J. J. Christensen
DOI:10.1021/ja00522a004
日期:1980.1
Ten new macrocyclic polyether-diester compounds containing a pyridine subcyclic unit substituted in the 4 position with chloro or methoxy groups have been prepared. These compounds along with their unsubstituted pyridine analogues form strong complexes with alkylammonium and some metal cations. Complexation with alkylammonium and potassium cations was accompanied by significant chemical-shift changes