申请人:Hodogaya Chemical Co., Ltd.
公开号:US04444983A1
公开(公告)日:1984-04-24
Para-chlorotoluene is prepared selectively at high yield by nuclear chlorination of toluene, in the presence of a Lewis acid catalyst, and a co-catalyst comprising at least one compound selected from the group consisting of phenoxthine derivatives and highly chlorinated phenoxthine derivatives obtained by chlorinating said phenoxthine derivatives at higher degree, said phenoxthine derivatives being represented by the general formula of: ##STR1## wherein R represents methyl group or groups at the position-1 and/or position-3, m is zero or an integer of 1 or 2, X is hydrogen or chlorine atom, and Y is chlorine atom or methyl group; and wherein m is an integer of 1 or 2 and X is hydrogen or chlorine atom when Y is chlorine atom, X is chlorine atom when Y is methyl group and m is zero, and X is hydrogen atom when Y is methyl group and m is an integer of 1 or 2.
对甲苯进行核氯化制备对氯甲苯,高收率选择性地在存在Lewis酸催化剂和共催化剂的情况下进行,所述共催化剂包括至少选择自酚噻吩衍生物和通过在更高程度下氯化所述酚噻吩衍生物获得的高度氯化的酚噻吩衍生物中的至少一种化合物,所述酚噻吩衍生物由以下一般式表示:##STR1##其中R代表甲基基团或1位和/或3位的基团,m为零或1或2的整数,X为氢或氯原子,Y为氯原子或甲基基团;当Y为氯原子时,m为1或2的整数,X为氢或氯原子,当Y为甲基基团且m为零时,X为氯原子,当Y为甲基基团且m为1或2的整数时,X为氢原子。