Societe Francaise Hoechst

Clariant (france) Sa

Clariant (france)

Clariant Specialty Fine Chemicals (france)

Clariant Speciality Fine Chemicals (france)

Sequa Chemicals Inc.

Weylchem Lamotte S.a.s.

Clariant Specialty Fine Chemicals

Didier Wilhelm

Jean-Claude Vallejos

Alain Blanc

Antonio Gelabert

Muriel Albalat

Armand Eranian

Philippe Vincent

Geraldine Primazot

Ngoc Can Vu

William C Floyd

Alain Schouteeten

Frederic Mabire

Michel Soreau

Fernand Cuirassier

Christian Roussel

Muriel Serradeil Albalat

Géraldine Primazot

Florence Esmard

Jean Kyriazis

The invention relates to a process for preparing optically active &#x3b1;-aminoacetals by resolution of a racemic mixture or of a mixture of enantiomers via the formation of diastereoisomeric salts, and also novel intermediates in the form of diastereoisomeric salts.

Process of preparation of optically active &#x3b1;aminoacetals

The invention relates to a process for the preparation of N-protected &#x3b1;-aminoaldehydes by deacetalization of the acetal functional group of corresponding N-protected &#x3b1;-aminoacetals using formic acid.

Process for deacetalisation of &#x3b1; aminoacetals

The invention relates to a process for the synthesis of stilbene derivatives of formula (I)-(E) or (I)-(Z) in which R represents hydrogen or an OH group,by deprotection in the presence of an aluminum halide and of a tertiary amine of a compound of formula (II)-(E) or (II)-(Z) in which A represents hydrogen or an OR'group, and R, R, Rand R&#x2032;independently represent an alkyl or aralkyl group.

Process for the synthesis of polyhydroxystilbene compounds

The invention relates to a process for preparing &#x3b1;-aminoacetals substantially in racemic form, comprising a step of oxidizing optically enriched &#x3b1;-aminoacetals to the corresponding oximes, in the presence of a catalyst, and a step of reducing the oximes thus obtained.

Process of racemisation of optically active alpha aminoacetals

The invention relates to aminoplast or phenoplast resins comprising the reaction product of the following compounds:

Aminoplast or phenoplast resin based on at least one glyoxal monoacetal and on glyoxylic acid, and its uses

Process for the preparation of primary amines of formula (I): where R3 represents an alkyl, cycloalkyl or aralkyl group, by reaction of a triazolium salt of formula (II): where R1 and R2 represent hydrogen or an alkyl, aralkyl or aryl group, R4 represents an alkyl or aralkyl group or a residue of an organic polymer functionalized by an alkylating group, and Arepresents a halogen, alkylsulphonate, arylsulphonate, alkyl sulphate, hydrogensulphate, hemisulphate, perchlorate or hydroxide, with a hydride, in order to obtain an amine of formula (I), which is isolated, if desired, and intermediates.

Process for the preparation of primary amines

Silico-acrylic compositions: method for their preparation and use

Phenolic compounds derived from dialkoxyethanals, their preparation process and their application

Silico-acrylic compositions, method of preparation and application to the obtaining of coatings resistant to abrasion and scratching

Process for finishing a textile and finishing baths

Aminoplastic resin based on one or more amino derivatives and one or more aldehydes in which the amino derivative is melamine, glycoluril or their mixture in variable proportions and that the aldehyde is a product of formula (I) R--CHO where R=a dialkoxymethyl, 1,3-dioxolan 2-yl group optionally substituted on the vertex 4 and/or 5 by one or more alkyl groups or a 1,3-dioxan 2-yl group optionally substituted on vertices 4, 5 and/or 6 by one or more alkyl groups, optionally mixed with glyoxal, preparation process and use as a crosslinking agent for cellulose.

Aminoplastic resins and their use as a crosslinking agent for cellulose

Use of a product of formula (I): ##STR1## in which M represents a hydrogen, lithium, sodium or potassium atom, or an NH.sub.4 group and n represents 2 or 3, as an agent for trapping hydrogen sulphide, its use for the preparation of a composition for trapping hydrogen sulphide and process for the elimination of hydrogen sulphide from a fluid.

Use of cyclic aminals of glyoxylic acid for trapping hydrogen sulphide

Substituted succinimides of formula (I) ##STR1## in which R represents an alkyl radical containing 5 to 15 carbon atoms and R.sub.1 represents an oxo-2 morpholino radical or a (carboxymethyl)(hydroxy-2 ethyl) amino radical and their salts, and use for obtaining concentrates intended for metal-working, particularly for combatting corrosion.

Substituted succinimides as corrosion inhibitors

Tris(2-acetoacetoxy ethyl)-amine, and its hydrosoluble mineral or organic acid salts, preparation process, use as formaldehyde collectors, and finishing process for fabrics based on cellulose fibres.

Tris (2-acetoacetoxy ethyl)-amine, and its hydrosoluble salts,

Process for finishing a textile in which the textile to be treated is impregnated using a finishing bath containing phosphinicosuccinic acid (I), phosphinicobissuccinic acid (II) or a mixture of phosphinicosuccinic acid (I) and phosphinico-bissuccinic acid (II), finishing bath, finished textile and use of previously-mentioned acids as textile finishes or as cross-linking agents for cellulose.

Growing community of inventors

Issy les Moulineaux, France

Didier Wilhelm