申请人:A. H. Robins Company, Inc.
公开号:US04727152A1
公开(公告)日:1988-02-23
Chemical intermediates having the formula: ##STR1## wherein A represents an aromatic or heterocyclic ring system selected from benzene, a naphthalene, a quinoline or a pyridine in any of its four positions, any of the rings systems are optionally substituted by one or two Y radicals selected from the group consisting of halo, loweralkyl, loweralkoxy, diloweralkylamino, nitro or trifluoromethyl; R is selected from the group consisting of loweralkyl, cycloalkyl or phenylloweralkyl wherein phenyl is optionally substituted by one or two radicals selected from halo, loweralkyl, loweralkoxy, nitro or trifluoromethyl; R.sup.4 and R.sup.5 are selected from hydrogen or loweralkyl; n is 1 or 2; X is selected from chlorine, bromine, or fluorine and E is selected from sulfur, oxygen or ##STR2## and chemical intermediates having the formula: ##STR3## wherein A, R, R.sup.4, R.sup.5, E and n are as defined above and Q is selected from the group consisting of ##STR4## wherein R.sup.3 is hydrogen, an acid neutralizing ion or an esterifying radical; with the proviso that when n is 2 and E is oxygen, A is other than phenyl or substituted phenyl. These chemical intermediates are useful in the preparation of oxazepinones, thiazepinones and diazepinones which exhibit antihistaminic activity.
化学中间体的化学式为:##STR1## 其中A代表苯、萘、喹啉或吡啶中的任意一个芳香或杂环环系,在任何四个位置上选择,任何一个环系都可以选择由卤、低烷基、低烷氧基、二低烷基氨基、硝基或三氟甲基中的一个或两个Y基团取代;R选自低烷基、环烷基或苯基低烷基,其中苯基可以选择由卤、低烷基、低烷氧基、硝基或三氟甲基中的一个或两个基团取代;R.sup.4和R.sup.5选自氢或低烷基;n为1或2;X选择氯、溴或氟,E选择硫、氧或##STR2## 化学中间体的化学式为:##STR3## 其中A、R、R.sup.4、R.sup.5、E和n的定义如上所述,Q选择##STR4## 其中R.sup.3为氢、酸中和离子或酯化基团;但当n为2且E为氧时,A不是苯或取代苯。这些化学中间体在制备具有抗组胺活性的噁唑烷酮、噻唑烷酮和二嗪烷酮方面非常有用。