Abstract: Process for preparing chloroprene by dehydrochlorinating 3,4-dichloro-1-butene in the presence of lime and a polyol, such as a glycol selected from (poly)ethylene glycol and (poly)propylene glycol or sugars, with ethylene glycol being preferred.

Abstract: A process for producing chloroprene by means of the dehydrochlorination of 3,4-dichloro-1-butene is disclosed, which is characterized in that the dehydrochlorination is carried out in the presence of lime and a primary amine having the general formula R--NH.sub.2, in which R is a monofunctional C.sub.1 -C.sub.15 hydrocarbyl radical selected from linear or branched alkyl, alkylaryl, cyclohexyl, alkylcyclohexyl, cyclopentyl, alkylcyclopentyl radicals.

Abstract: Nitrophenols, in an isomer ratio para-nitrophenol/ortho-nitrophenol of at least 55/45, are continuously and directly prepared in steady state, by (a) establishing, in a confined reaction zone, an aqueous reaction solution including from 5% to 40% by weight of nitric acid, from 5% to 40% by weight of nitrous acid relative thereto, and an amount of nitrophenols within the limits of the solubility thereof in such reaction solution, (b) continuously introducing and reacting phenol and nitric acid into and with such reaction solution, at a rate of about 0.5 to 2.0 moles of nitric acid per mole of phenol, (c) maintaining the temperature in such confined reaction zone at a value ranging from about 10.degree. to about 40.degree. C. during such reaction, and (d) continuously withdrawing from such confined reaction zone admixture of para-nitrophenol and ortho-nitrophenol, in an isomer ratio para-nitrophenol/ortho-nitrophenol of at least 55/45.

Abstract: Process for the preparation of 7-chloro-1,2,3,4-tetrahydroquinolin-4-one by cyclizing 3-m-chloroanilinopropionic acid by means of an oleum, and desulphonating the resulting aromatic sulphonic acids by means of dilute sulphuric acid. The quinolinone product is useful as a starting material for the preparation of pharmaceuticals.

Abstract: 4-Amino-chloroquinolines of the formula: ##STR1## in which R.sub.1 represents a hydrogen atom or an alkyl radical (1 to 5 carbon atoms), and R.sub.2 represents an alkyl radical (1 to 5 carbon atoms) optionally substituted by a dialkylamino group, or a phenyl radical optionally substituted by one or more carboxy and hydroxy radicals and alkyl radicals (1 to 4 carbon atoms) optionally substituted by a dialkylamino group, are prepared by the condensation of an amine of the formula: ##STR2## with a chloro-1,2,3,4-tetrahydroquinolin-4-one of the formula: ##STR3## with aromatization of the tetrahydroquinoline, the reaction being carried out in the presence of a ruthenium based catalyst on a support.The 4-amino-chloroquinoline products are useful as pharmaceuticals.

Abstract: Process for the preparation of 4-hydroxyquinolines of the general formula: ##STR1## in which R represents a hydrogen atom, or one, two or three substituents, which may be the same or different, selected from halogen atoms, alkyl radicals containing 1 to 4 carbon atoms, alkoxy radicals containing 1 to 4 carbon atoms, and the trifluoromethyl radical, the substituent(s) being in the 2-, 3-, 5-, 6-, 7- or 8-position, by the oxidation, by means of oxygen or air, in the presence of a catalyst based on platinum or ruthenium, or alloys thereof, of a 1,2,3,4-tetrahydroquinolin-4-one of the general formula: ##STR2## in which R is as defined above.

Abstract: 1,2,3,4-Tetrahydroquinolin-4-ones of the formula: ##STR1## wherein R represents a hydrogen or halogen atom, an alkyl radical (1 to 4 carbon atoms), an alkoxy radical (1 to 4 carbon atoms) or the trifluoromethyl radical, and R.sub.1 represents a hydrogen atom, an alkyl radical (1 to 4 carbon atoms) or the trifluoromethyl radical, are prepared by cyclizing a 3-anilinopropionic acid of the formula: ##STR2## (wherein R and R.sub.1 are as hereinbefore defined) in a mixture of hydrofluoric acid and boron trifluoride.The quinolinone products are useful intermediates in the synthesis of therapeutically active substances.

Abstract: N-substituted oligo-imides of the formula: ##STR1## in which D represents a divalent radical selected from the group comprising: ##STR2## in which m is 0 or 1, Y is hydrogen, chlorine or methyl, n is a positive integer of 5 or less, and R is an organic radical of valency n, containing up to 50 carbon atoms, are prepared by reacting an anhydride of the formula: ##STR3## with an amine of the formula:R----NH.sub.2).sub.n [III]in which formulae D, R and n are as above defined, said reaction being carried out in the presence of a catalyst system comprising a mixture of a compound (1) and a compound (2), (1) being a strong inorganic or organic oxygen-containing acid and (2) being an ammonium salt of such acid, said ammonium salt being di-, tri- or, preferably, tetra-substituted on the nitrogen atom by organic radicals.

Abstract: N-substituted oligo-imides of the formula: ##STR1## in which D represents a divalent radical selected from the group comprising: ##STR2## in which m is 0 or 1, Y is hydrogen, chlorine or methyl, n is a positive integer of 5 or less, and R is an organic radical of valency n, containing up to 50 carbon atoms, are prepared by reacting an anhydride of the formula: ##STR3## with an amine of the formula:R--NH.sub.2).sub.n [III]in which formulae D, R, and n as above defined, said reaction being carried out in the presence of a catalyst system comprising a mixture of a compound (.alpha.) and a compound (.beta.), being a strong inorganic or organic oxygen-containing acid and (.beta.) being a salt of such acid with a cation selected from the group comprising pyridinium, quaternary phosphonium and tertiary sulfonium cations.

Abstract: A process for preparing 2-phenyl-ethanol is provided in which ethylene is reacted with benzene and thallic trifluoroacetate in trifluoroacetic acid as the solvent to give 2-phenyl-ethyl trifluoroacetate which is then converted, in known manner, into 2-phenyl-ethanol.