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具有式(I)的酸酰胺或其盐的过程##STR1##其中R.sup.1是氢或易于去除的酯化或盐化基团,最好是三烷基氨基,三烷基硅基,三氯乙基,乙酰氧甲基,苯乙酰,取代苯乙酰,取代苯基或苄基,R.sup.2是氢,烷基,烯基,具有芳基或杂环基团(最好是呋喃基或噻吩基)的烷基,具有烷基取代基(最好是二甲苯基)的芳基,或芳基,芳基烷基或杂环基(最好是苯基,噻吩基或呋喃基)可以有一个或多个取代基,R.sup.3是氢,或取代或未取代的芳基,烷基,环烷基或芳基烷基,X是式之一的基团##STR2##根据本发明,式(II)的胺##STR3##其中R.sup.4是易于去除的酯化基团,最好是三烷基氨基,三烷基硅基,三氯乙基,乙酰氧甲基,苯乙酰,取代苯乙酰,取代苯基或苄基,或与碱金属或三烷基胺形成的盐,与式(III)的酯发生酰化反应##STR4##其中R.sup.5是取代或未取代的芳基,烷基,环烷基或芳基烷基,如有必要,所得产物的取代基R.sup.4和/或R.sup.5可以被分离,并且如有必要,所得产物可以转化为其盐或将盐转化为游离酸。