Three novel calix[4](aza)crown deravatives have been synthesized, including a new [2]pseudorotaxane in which calix[4]azacrown behaves as a stopper, a novel 'tren' type calix[4]azacrown and a novel 'spiro' type calix[4]azacrown containing morpholine unit. The structures of these compounds have been confirmed by NMR and MS. (c) 2007 Ya Qing Feng. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.