Novel tetramers of 1,3-adamantane and 5,7-dibutyl-1,3-adamantane were synthesized by the coupling reaction of 3-bromo-1,1′-biadamantane or 3-bromo-5,5′,7,7′-tetrabutyl-1,1′-biadamantane with sodium in n-octane or with magnesium in diethyl ether. Although the former 1,3-adamantane tetramer showed poor solubility in organic solvents, the latter tetrameric 5,7-dibutyl-1,3-adamantane was readily soluble
Drugs or medicines for influencing the central nervous system
申请人:Merz & Co.
公开号:US04122193A1
公开(公告)日:1978-10-24
Certain 1,3,5-trisubstituted adamantane compounds having central nervous system activity, especially anti-Parkinsonism activity, method of preparing same, and pharmaceutical compositions thereof, method of influencing the central nervous system therewith.
Benzoxazole Resin Precursor, Polybenzoxazole Resin, Resin Film And Semiconductor Device
申请人:Enoki Takashi
公开号:US20080206548A1
公开(公告)日:2008-08-28
A benzoxazole resin precursor comprising a first repeating unit which is obtained by the reaction of a bisaminophenol compound and a dicarboxylic acid compound, at least one of which has the diamondoid structure; a benzoxazole resin precursor further comprising a second repeating unit which is obtained by the reaction of a bisaminophenol compound having no diamondoid structure and a dicarboxylic acid compound having no diamondoid structure; a polybenzoxazole resin obtained by the ring-closing reaction with dehydration of the above benzoxazole resin precursor; a resin film constituted with the benzoxazole resin precursor or the polybenzoxazole resin. A polybenzoxazole resin and a resin film having excellent heat resistance and a small permittivity and a semiconductor device using the resin film can be obtained from the benzoxazole resin precursor.
BENZOXAZOLE RESIN PRECURSOR, POLYBENZOXAZOLE RESIN, RESIN FILM, AND SEMICONDUCTOR DEVICE
申请人:Sumitomo Bakelite Company, Limited
公开号:EP1832619A1
公开(公告)日:2007-09-12
A benzoxazole resin precursor comprising a first repeating unit which is obtained by the reaction of a bisaminophenol compound and a dicarboxylic acid compound, at least one of which has the diamondoid structure; a benzoxazole resin precursor further comprising a second repeating unit which is obtained by the reaction of a bisaminophenol compound having no diamondoid structure and a dicarboxylic acid compound having no diamondoid structure; a polybenzoxazole resin obtained by the ring-closing reaction with dehydration of the above benzoxazole resin precursor; a resin film constituted with the benzoxazole resin precursor or the polybenzoxazole resin. A polybenzoxazole resin and a resin film having excellent heat resistance and a small permittivity and a semiconductor device using the resin film can be obtained from the benzoxazole resin precursor.