申请人:The United States of America as represented by the Secretary of the Air
公开号:US05670651A1
公开(公告)日:1997-09-23
Benzocyclobutene-terminated monomers of the formula ##STR1## wherein Ar is --SO.sub.2 --, --CO--, or ##STR2## are prepared by reacting a benzocyclobutene of the formula ##STR3## wherein R is --H or --SiMe.sub.3, with a difluorophenyl compound of the formula ##STR4## wherein Ar is as described previously, in the presence of a promoter. A mixture of the resins is obtained when potassium carbonate is employed as the promoter. The bis(benzocyclobutene)-terminated monomer is obtained when cesium fluoride is employed as the promoter.
申请人:The United States of America as represented by the Secretary of the Air
公开号:US05616765A1
公开(公告)日:1997-04-01
4-Hydroxybenzocyclobutene is prepared by the demethylation of 4-methoxybenzocyclobutene in the presence of aluminum iodide. A new compound 4-trimethylsiloxybenzocyclobutene is prepared by reacting 4-hydroxybenzocyclobutene with chlorotrimethylsilane.