申请人:Ciba-Geigy Corporation
公开号:US04721797A1
公开(公告)日:1988-01-26
N-acyl-N-alkyl-2,6-dialkyl-3-chloroanilines of the formula ##STR1## wherein R.sub.1 is methyl or ethyl, R.sub.2 is alkoxymethyl, chloromethyl or 2-tetrahydrofuryl, R.sub.3 is alkoxymethyl, carboxy or alkoxycarbonyl and R.sub.4 is hydrogen or methyl and, if R.sub.3 is carboxy or alkoxycarbonyl, R.sub.4 is also 2-alkoxyethyl and 2-alkoxypropyl, and R.sub.3 and R.sub.4, together with the carbon atom to which both radicals are attached, may also form a 2-oxotetrahydro-3-furyl radical or a 2-oxo-5-methyltetrahydro-3-furyl radical, are prepared by reacting a 2,6-dialkylaniline of the formula ##STR2## with a halide of the formula ##STR3## wherein X is chlorine or bromine, to give an N-alkyl-2,6-dialkylaniline of the formula ##STR4## then converting said compound by further reaction with an acylating agent of the formula X.sub.1 --CO--R.sub.2 wherein X.sub.1 is chlorine, bromine or -O-CO-R.sub.2, into an N-acyl-N-alkyl-2,6-dialkylaniline of the formula ##STR5## and subsequently converting said compound by reaction with chlorine into an N-acyl-N-alkyl-2,6-dialkyl-3-chloroaniline of the above formula.
该公式为 ##STR1## 的N-酰基-N-烷基-2,6-二烷基-3-氯苯胺,其中 R.sub.1 是甲基或乙基,R.sub.2 是烷氧甲基,氯甲基或2-四氢呋喃基,R.sub.3 是烷氧甲基,羧基或烷氧羰基,R.sub.4 是氢或甲基,如果 R.sub.3 是羧基或烷氧羰基,则 R.sub.4 也是2-烷氧基乙基和2-烷氧基丙基,且 R.sub.3 和 R.sub.4 还可以与它们所连接的碳原子一起形成2-氧代四氢-3-呋喃基或2-氧代-5-甲基四氢-3-呋喃基。该化合物可通过将公式为 ##STR2## 的2,6-二烷基苯胺与公式为 ##STR3## 的卤代物反应制备得到,其中 X 是氯或溴,以得到公式为 ##STR4## 的N-烷基-2,6-二烷基苯胺,然后通过进一步与公式为 X.sub.1--CO--R.sub.2 的酰化剂反应,其中 X.sub.1 是氯,溴或-O-CO-R.sub.2,将该化合物转化为公式为 ##STR5## 的N-酰基-N-烷基-2,6-二烷基苯胺,然后通过与氯反应将该化合物转化为上述公式的N-酰基-N-烷基-2,6-二烷基-3-氯苯胺。