In 3 - position substituted, in 2 - and 5 - position unsubstituted pyrroles and method for their preparation

摘要

P & these pyrroles correspond to formula i c - after for preparing them, is reacted with a 2,5 - dialkoxy - tetrahydrofuran of formula ii with the primary amines of formula (iii). / p & & p & they are of interest for the preparation of pharmaceutical products, dyes and of plant-protection products. / p