申请人:Imperial Chemical Industries Limited
公开号:US04550206A1
公开(公告)日:1985-10-29
Tetrahalobenzene compounds of the formula (I): ##STR1## in which X is independently chloro or, preferably, fluoro and Y is hydrogen or --N.sup.+ R.sub.3 A.sup.- in which each R is independently C.sub.1-4 alkyl and A is a radical capable of forming an anion A.sup.-, are prepared by (a) alkylating a compound of formula (II): ##STR2## or a salt thereof, to form a compound of formula (III): ##STR3## (b) treating the compound of formula (III) with a quaternizing agent of formula RA to form a compound of formula (IV): ##STR4## and (c) partially or completely reductively cleaving the compound of formula (IV) to replace one or both --N.sup.+ R.sub.3 A.sup.- groups by hydrogen. Compounds (I), in which Y is --N.sup.+ R.sub.3 A.sup.-, (III) and (IV) are novel. Compound (I) is useful in the synthesis of insecticides.
化合物(I)的四卤代苯化合物的化学式为:##STR1## 其中X独立地为氯或优选地为氟,Y为氢或--N.sup.+ R.sub.3 A.sup.-,其中每个R独立地为C.sub.1-4烷基,A为能形成阴离子A.sup.-的基团。该化合物的制备方法包括:(a)烷基化化合物(II)的化学式:##STR2## 或其盐,以形成化合物(III)的化学式:##STR3## (b)用化学式RA的季铵化试剂处理化合物(III)以形成化合物(IV)的化学式:##STR4## (c)部分或完全还原裂解化合物(IV),以用氢代替一个或两个--N.sup.+ R.sub.3 A.sup.-基团。化合物(I)中的Y为--N.sup.+ R.sub.3 A.sup.-,化合物(III)和(IV)是新颖的。化合物(I)在杀虫剂的合成中有用。