Societe Nationale Elf Aquitaine

Elf Aquitaine

Sylvain Juge

Jean-Pierre Genet

Jean-Alex Laffitte

Sergio Mallart

Jean A Laffitte

Catherine Pinel

Yvonne Legras

Massoud Stephan

Dominique Pons

Serge Mallart

Jean P Genet

Process for enantioselective hydrogenation of the oxo C.dbd.O double bond

Chiral phosphinite-boranes and their preparation and use

Process for the hydrogenation of ethylenically unsaturated organic

Preparation of chiral catalysts based on ruthenium and phosphorus

This invention is concerned with new chiral diphosphinite-borane compound of the formula ##STR1## wherein R.sup.1 and R.sup.2, identical or different, represent each a C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.18 cycloalkyl, C.sub.7 -C.sub.18 aralkyl or C.sub.6 -C.sub.14 aryl group which can bear functional groups,

Chiral phosphinite-boranes, their preparation and uses

New chemical product, constituted by an organic phosphorus compound of the structure ##STR1## where Q is an N or O atom, T is an alkylene or arylene, possibly carrying substituents, or not existing, while R.sup.1 to R.sup.7, the same or different, are H or aliphatic, cycloaliphatic and/or arylic hydrocarbon radicals, possibly substituted, R.sup.3 not existing when Q is oxygen. This product is used as an intermediate in the preparation of different derivatives of phosphinous acid.

Process for preparation of derivatives of phosphinous acid

Oxidation of epoxy alcohols into carboxilic epoxy acids

Phosphinamides are prepared by the action of an organic halide on an oxazaphospholidine. Depending upon the configuration desired for the stereoisomer to be obtained, an oxazaphospholidine is utilized which has been derived from a (+) or (-) optically-active amino-alcohol. These phosphinamides are useful for the preparation of phosphinates, in particular optically-active phosphinates of known absolute configuration; for this, the phosphinamide is subjected to alcoholysis.

Process of preparation of phosphinamides, applications and new products

New organic phosphorus compounds, comprised of hetero-phosphacycloalkanes whose phosphorus atom forms a complex with a borane. They can be prepared by the action of a borane on a hetero-phosphacycloalkane, within a solvent, at temperatures ranging from -20.degree. to +60.degree. C. Their transformation into other derivatives, phosphinites or phosphines in particular, can be carried out without any modification in the chirality of the initial complex. An especially useful application is their conversion into highly optically active phosphines, used in particular as catalysts in various reactions.

Organic phosphorus compounds complexed to boron, their preparation and

Process of preparation of phosphinamides applications and new products

New cyclic phosphonites, in which one of the oxygen atoms of the ring can be replaced by an atom of sulphur or nitrogen; the molecule has an asymmetry due to at least two carbon atoms, one or more nitrogen and/or oxygen atoms or several of these elements together. Preparation of these phosphonites by the reaction of a dihalogeno-phosphine with a compound having two active H atoms, in the presence of a hydracid acceptor. Application of the new phosphonites to the production of the corresponding phosphinates and phosphine oxides.

Cyclic phosphonites

Process for preparation of derivatives of phosphinous acid and

New organic compounds containing a phosphorus heterocycle of the phosphonite type, in which the phosphorus atom is connected on the one hand to an oxygen atom and on the other hand to an oxygen, sulphur or nitrogen atom, characterized by comprising two of such heterocycles, the two phosphorus atoms being connected by a hydrocarbon group. Preparation of these diphosphonites by the action of a tetrahalogeno- or tetraminodiphosphine upon a diol or an alcohol carrying a phenol, thiol, enol, acid or amine function.

Cyclic diphosphonites

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Orsay, France

Sylvain Juge