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公开(公告)号:US4675413A
公开(公告)日:1987-06-23
申请号:US811246
申请日:1985-12-19
申请人: Maria Bakonyi , Gyorgy Lugosi , Tamas Kallai , Maria Hima nee Toth , Tibor Montai , Maria Sziladi
发明人: Maria Bakonyi , Gyorgy Lugosi , Tamas Kallai , Maria Hima nee Toth , Tibor Montai , Maria Sziladi
IPC分类号: C07D235/32 , C07D235/04
CPC分类号: C07D235/32
摘要: A new process is disclosed for preparing a compound of the formula (I) ##STR1## wherein R is C.sub.1 to C.sub.5 alkyl; which comprises reducing a compound of the formula (II) ##STR2## or salt thereof wherein A is --SO.sub.2 X, --SOH, --SOA.sup.1, or --SA.sup.1 group,X is chlorine or hydrogen; andA.sup.1 is a group of the Formula ##STR3## with the aid of aluminum activated with a catalytic amount of a metal and/or metal salt in a mixture of water, a mineral acid, and an aliphatic carboxylic acid having 1 to 3 carbon atoms at a temperature of 0.degree. to 100.degree. C., thereafter, optionally, the product is recovered from an acid medium at a pH range of 2 to 3 in crystalline form.
摘要翻译: 公开了用于制备式(I)化合物的新方法,其中R是C1至C5烷基; 其包括还原式(II)的化合物或其盐,其中A是-SO 2 X,-SOH,-SOA 1或-SA 1基团,X是氯或氢; 并且A1是通过在水,无机酸和具有1至3个碳原子的脂族羧酸的混合物中催化量的金属和/或金属盐活化的铝的助催化剂的组合的“IMAGE” 在0℃至100℃的温度下,然后,任选地,该产物从酸性介质中以2至3的结晶形式从pH值范围内回收。