申请人:Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Rt.
公开号:US04171303A1
公开(公告)日:1979-10-16
This invention relates to a process for the preparation of acid amides having the formula (I) or their salts ##STR1## wherein R.sup.1 is hydrogen or an easily removable ester-forming or salt-forming group, preferably a trialkylamino, trialkylsilyl, trichloroethyl, acetoxymethyl, phenacyl, substituted phenacyl, substituted phenyl or benzyl group, R.sup.2 is hydrogen, alkyl group, alkenyl group, alkyl group having an aryl or heterocyclic (preferably furyl or thienyl)-substituent, an aryl group having an alkyl substituent (preferably xylyl), or an aryl, aralkyl or heterocyclic group, (preferably a phenyl, thienyl, or furyl group) which can have one or more substituents, R.sup.3 is hydrogen, or substituted or unsubstituted aryl, alkyl, cycloalkyl or aralkyl group, and X is a group of one of the formulae ##STR2## according to the invention an amine of the formula (II), ##STR3## wherein R.sup.4 is an easily removable ester-forming group, preferably a trialkylamino, trialkylsilyl, trichloroethyl, acetoxymethyl, phenacyl, substituted phenacyl, substituted phenyl or benzyl group, or a salt formed preferably with an alkali metal or a trialkylamine, is acylated with an ester of the formula (III), ##STR4## wherein R.sup.5 is a substituted or unsubstituted aryl, alkyl, cycloalkyl or aralkyl group, and, if desired, substituents R.sup.4 and/or R.sup.5 of the obtained product can be split off, and/or, if desired, the obtained product is converted into its salt or a salt is converted into the free acid.
本发明涉及一种制备酸酰胺化合物(I)或其盐的方法,其中R1为氢或易于去除的酯基或盐基,优选为三烷基胺基、三烷基硅基、三氯乙基、乙酰氧甲基、苯乙酰基、取代苯乙酰基、取代苯基或苄基;R2为氢、烷基、烯基、带有芳基或杂环基(优选为呋喃基或噻吩基)的烷基、带有烷基取代基(优选为二甲苯基)的芳基、芳基、芳基烷基或杂环基(优选为苯基、噻吩基或呋喃基);R3为氢、取代或未取代的芳基、烷基、环烷基或芳基烷基;X为以下公式之一的基团之一:其中本发明的方法为将以下式(II)的胺基化合物:其中R4为易于去除的酯基,优选为三烷基胺基、三烷基硅基、三氯乙基、乙酰氧甲基、苯乙酰基、取代苯乙酰基、取代苯基或苄基,或与碱金属或三烷基胺形成的盐,与以下式(III)的酯化合物酰化:其中R5为取代或未取代的芳基、烷基、环烷基或芳基烷基,所得产物的R4和/或R5取代基可被分离,或如有需要,所得产物可转化为其盐或将盐转化为游离酸。