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.
通过在促进剂的存在下,反应公式为##STR3##的苯并环丁烯(其中R为--H或--SiMe.sub.3)与公式为##STR4##的二氟苯基化合物(其中Ar如前所述)来制备公式为##STR1##的苯并环丁烯终止单体,其中Ar为--SO.sub.2 --、--CO--或##STR2##。当钾碳酸盐用作促进剂时,得到树脂的混合物。当氟化铯用作促进剂时,得到双(苯并环丁烯)终止单体。