Abstract: 1-Pyrrole- and 1-pyrrolidine-carboxylic acid derivatives corresponding to the general formula: ##STR1## in which R represents an alkyl radical having from 1 to 4 carbon atoms, preferably ethyl, and Am represents a group: ##STR2## wherein R.sub.1 represents a 3-oxo-alkyl radical ##STR3## or a 3-oxo-alkenyl radical ##STR4## and R.sub.2 represents hydrogen or R.sub.1 and R.sub.2, when they are identical, each represent hydrogen, ##STR5## R.sub.3 representing an alkyl radical having from 1 to 5 carbon atoms with the proviso that when R.sub.1 and R.sub.2 are simultaneously hydrogen, Am represents the group A.The novel derivatives are useful as intermediates for synthetizing azaprostaglandines.

Abstract: Prostaglandin derivatives corresponding to the general formula: ##STR1## wherein R.sub.1 represents hydrogen, methyl or ethyl, R.sub.2, R.sub.3 and R.sub.4, which are the same or different, each represent hydrogen or methyl and R is selected from the groups consisting of: ##STR2## in which R.sub.5 represents hydrogen, methyl or ethyl, R.sub.6 represents methyl, ethyl or acetyl and R.sub.7 and R.sub.8, when they are different, each represent hydrogen or a branched- or straight-chain alkyl group having from 1 to 7 carbon atoms or R.sub.7 and R.sub.8, when they are identical, each represent hydrogen or a straight-chain alkyl group having from 1 to 3 carbon atoms with the provisos that:When both R.sub.7 and R.sub.8 represent hydrogen, R.sub.5 is methyl or ethyl,When R.sub.5 represents methyl and R.sub.2, R.sub.3, R.sub.4, R.sub.7 and R.sub.8 all represent hydrogen then R.sub.1 is ethyl,The said prostaglandin derivatives being in the form of a mixture of isomers or of an individual isomer.

Abstract: The present invention relates to new stabilizers of polymers and co-polymers of vinyl chloride corresponding to the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which are the same or different, represent:R.sub.1 = a hydrogen atom or a branched- or straight-chain alkyloxy group containing from 1 to 12 carbon atoms,R.sub.2 = a hydrogen atom, a branched-or straight-chain alkyl group containing from 1 to 3 carbon atoms or a branched- or straight-chain alkyloxy group containing from 1 to 12 carbon atoms,R.sub.3 and R.sub.5 = a hydrogen atom, a hydroxy group, a branched- or straight-chain alkyl group containing from 1 to 3 carbon atoms or a branched- or straight-chain alkyloxy group containing from 1 to 12 carbon atoms,R.sub.4 = a hydrogen atom, a hydroxy group, a branched- or straight-chain alkyl group containing from 1 to 3 carbon atoms or a branched- or straight-chain alkyloxy group containing from 2 to 12 carbon atoms,R.sub.

Abstract: New stabilizers for polymers of vinyl chloride, the said stabilizers being 2-phenyl-indole derivatives corresponding to the formula: ##STR1## wherein R.sub.1 and R.sub.2, which are the same or different, each represent a branched- or straight-chain alkyl group containing from 1 to 12 carbon atoms, a cyclohexyl radical, a branched- or straight-chain alkyloxy group containing from 1 to 12 carbon atoms, a benzyloxy radical, a hydroxy radical or R.sub.1 and R.sub.2 represent together an alkylenedioxy radical containing from 1 to 3 carbon atoms, R.sub.3 represents a hydrogen atom, a methyl or methoxy radical, with the proviso that one at least of the substituents R.sub.1 or R.sub.2 does not represent an alkyl radical.

Abstract: New stabilizers of polymers and co-polymers of vinyl chloride, the said stabilizers being 2-phenyl-indole derivatives corresponding to the formula: ##STR1## wherein R represents a phenyl radical, an amino group, optionally substituted by an acetyl or benzoyl radical, a mercapto group, optionally substituted by a branched-or straight-chain alkyl group containing from 1 to 12 carbon atoms or by a cyclohexyl radical, a carboxyl radical, a radical represented by the formula:R.sub.1 O--wherein R.sub.1 represents a hydrogen atom, an isopropyl, carboxymethyl, carbethoxymethyl, carbethoxyisopropyl, acetyl, docosanoyl, benzoyl, benzyl, or allyl radical or a branched-or straight-chain alkyl radical containing from 6 to 12 carbon atoms.

Abstract: New stabilizers of polymers and co-polymers of vinyl chloride, the said stabilizers being 2-phenyl-indole derivatives corresponding to the formula: ##STR1## wherein R.sub.1 and R.sub.2, which are the same or different, each represent a branched- or straight-chain alkyl group containing from 1 to 12 carbon atoms, a cyclohexyl radical, a branched- or straight-chain alkyloxy group containing from 1 to 12 carbon atoms, a benzyloxy radical, a hydroxy radical or R.sub.1 and R.sub.2 represent together an alkylenedioxy radical containing from 1 to 3 carbon atoms, R.sub.3 represents a hydrogen atom, a methyl or methoxy radical, with the proviso that one at least of the substituents R.sub.1 or R.sub.2 does not represent an alkyl radical.