申请人:Montedison S.p.A.
公开号:US04795838A1
公开(公告)日:1989-01-03
Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p-methylbenzyltrimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is carried out in the presence of a dialkylether of mono- and poly-ethylene glycols having the formula: R--O--CH.sub.2 CH.sub.2 O--.sub.n R' (I) wherein R and R', which may be the same or different, represent alkyl groups having from 1 to 5 carbon atoms, and n is an integer from 1 to 5.
通过在含有碱金属氢氧化物的水溶液中,利用对甲基苄基三甲基铵氢氧化物或其衍生物的Hofmann消除法,制备(2,2)-对联环辛烷或其衍生物的过程,其中所述消除在具有以下式的单-和聚乙二醇二烷基醚的存在下进行:R--O--CH.sub.2 CH.sub.2 O--.sub.n R' (I),其中R和R',可以相同也可以不同,代表具有1至5个碳原子的烷基基团,n为1至5的整数。