A process for the preparation of alpha-(N-pyrrolyl)-derivative acids, the salts and esters thereof, of the formula ##STR1## in which R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrogen atoms or substituted or unsubstituted alkyl, aryl, alkylaryl or heterocyclic radicals and R' is a metal cation, an organic base or an organic radical, wherein the corresponding amino ester is reacted with a dialkoxytetrahydrofuran or a derivative thereof. Certain compounds comprised among those corresponding to the above formula, particularly the DL, D and L-alpha-(N-pyrrolyl)-phenylacetic acids and certain esters thereof. Therapeutical compositions containing such compounds as active ingredient and therapeutical applications of said compounds.
一种制备α-(N-
吡咯基)衍
生物酸及其盐和
酯的方法,其
化学式为##
STR1##其中R、R.sub.1、R.sub.2、R.sub.3和R.sub.4是
氢原子或取代或未取代的烷基、芳基、烷基芳基或杂环基团,R'是
金属阳离子、有机碱基或有机基团,其中相应的
氨基
酯与二烷
氧基
四氢呋喃或其衍
生物反应。特别是DL、D和L-α-(N-
吡咯基)-
苯乙酸及其某些
酯的化合物。含有这些化合物作为活性成分的治疗组合物和这些化合物的治疗应用。