Syntheses and Properties of Symmetrical Cage Compounds, in which All Six, Eight or Ten Lone Pairs on Nitrogen Atoms at Bridgehead or Intervening Pyridine Rings are Oriented toward the Central Cavity.

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Three dimensional Cryptands, in which all six, eight or ten lone pairs on nitrogen atoms at bridgehead or intervening pyridine rings are oriented toward the central cavity, were synthesized.The compounds, in which of the six benzene rings, four or all six rings are replaced by the pyridine rings, were obtained as their alkali metal cryptates. Complexation ability was enhanced by increasing number of intervening pyridine rings.Preliminary X-ray analysis of dimetaxylylenetetra(2,6-lutidylene)tetramine. KC10 4 complex shows that K^+ ion locates in the central cavity of the cryptand.