10-Chloro-1,7-ditosyl-8-phenyl-4,1,7-benzoxadiazecine is obtained by reacting the sodium salt of N , N ′-ditosyl-2-amino-5-chlorobenzhydrylamine with the ditosylate of bis(hydroxyethyl) ether in DMF. The structure of the title compound was established by X-ray crystal structure analysis. The 10-membered ring that is the core of the molecule is asymmetric and considerably folded. © 1995 John Wiley & Sons, Inc.