The title compounds, I, were synthesized by the dialkylation of TosMIC, II, with appropriate bis (halomethyl) compounds, III, under phase-transfer condition, followed by acid hydrolysis.
Photoirradiation of [3.3]cyclophane-2,11-diones with a high-pressure Hg lamp in benzene provides the corresponding [2.2]cyclophanes in high yields along with [3.2]-cyclophane-2-ones. (C) 1998 Elsevier Science Ltd. All rights reserved.