The yield of fully substituted, multidimensional aromatic hubs in the condensation of hydroxyl and acid halide functionalities is improved by adding a thallium catalyst, such as thallium ethoxide (Tl-OC.sub.2 H.sub.5), in the solvent.
REFERENCE TO RELATED APPLICATION
The present application is a continuation of U.S. patent application Ser. No. 08/161,164, filed Dec. 3, 1993, now abandoned which is a Division of application Ser. No. 07/176,518 filed Apr. 1, 1988 which is a continuation-in-part application based upon U.S. patent application Ser. No. 810,817, filed Dec. 17, 1985, now abandoned which was a continuation-in-part application based upon U.S. patent application Ser. No. 726,258, filed Apr. 23, 1985, now abandoned.
