The aluminium chloride catalysed Friedel-Crafts reaction between adipoyl ch
loride and bromobenzene has been reexamined. At elevated temperatures a num
ber of side products are produced including a cyclopentane epoxide. The str
ucture of this epoxide was elucidated by nmr and ir spectroscopy and its st
ereochemistry confirmed by x-ray crystallography. (C) 1998 Elsevier Science
Ltd. All rights reserved.