Convenient synthesis of selectively substituted tribenzo[a,d,g]cyclononatrienes

Convenient laboratory procedures for obtaining selectively substituted dihydro-5H-tribenzo[a,d,g]cyclononatrienes have been achieved. X-ray structure determination indicates that 2d is present in the solid state in the crown conformation to yield H-bonded columns and pillars with a hydrophilic interior and hydrophobic exterior that can be used for the design of specific sensor materials. (c) 2005 Elsevier Ltd. All rights reserved.