A. Arienti et al., HIGHLY SELECTIVE CONVERSION OF HYDROXYLATED BIARYLS TO DIBENZOFURAN DERIVATIVES OVER ZEOLITE CATALYST, Journal of the Chemical Society. Perkin transactions. I, (9), 1997, pp. 1391-1393
Zeolite HSZ-360 promotes the conversion of hydroxylated biaryls to dib
enzofuran derivatives in satisfactory yields and excellent selectiviti
es, Clays and amorphous silica-alumina are inert or less effective.