Singly bridged double resorcin[4]arene bearing sixteen hydroxyl groups. Formation of capsular-type inclusion complexes in methanol

The Sc(OTf)3-catalyzed mixed cyclocondensation of bis-1,2-(2,6-dihydroxyphenyl)ethane and 2-hexylresorcinol gave a singly bridged double-resorcinarene bearing sixteen hydroxyl groups at the peripheral positions. In methanol, the double-resorcinarene binds quaternary ammonium ions to form capsular-type 1:1 complexes.