Rhone-Poulenc Nutrition Animale

Adisseo France Sas

Aventis Agriculture Limited

Aventis Animal Nutrition S.a.

Basf Agro B.v., Amhem (Nl) - Wadenswil Branch

Basf Agro B.v. Arnhem

Basf Agro B.v. Arnthem (Nl) Wädenswil-Branch

Jean-Erick Ancel

Pierre Meilland

Hugues Bienayme

Joelle Vidal

Pierre Duhamel

Lucette Duhamel

Bienayme, Hugues

A process for the preparation of compound (III) which comprises the reaction between a compound of general formula (V) and dicyano acetylene (IV), said reaction carried out in the presence of water 

Process for the preparation of phenyl pyrazole compounds

A process for the preparation of compound (III) which comprises the reaction between a compound of general formula (V) and dicyano acetylene (IV), said reaction carried out in the presence of water (IV), (V), (III) wherein R is selected from CF, or Cto Calkyl M is an alkaline or alkaline-earth metal or silver 

The present invention relates to processes for the preparation of a compound of the formula wherein W is nitrogen or &#x2014;CR; Ris halogen, haloalkyl, haloalkoxy, RS(O)&#x2014; or &#x2014;SF; Ris hydrogen or halogen; Ris halogen; Ris alkyl or haloalkyl; and n is 0, 1 or 2; and processes for using a compound of the formula (I) in the synthesis of compounds of the formula 

Processes for preparing pesticidal intermediates

A process for the preparation of a novel intermediate compound useful in the preparation of phytone and vitamin E.

Process for the preparation of phytone

Intermediate compounds which can be used in the preparation of phytone and Vitamin E, a process for the preparation thereof, and a process for the preparation of phytone and Vitamin E from these intermediate compounds.

Intermediates for use in the preparation of vitamin E

The invention relates to a process for making vitamin A from ethynyl-retro-&agr;-ionol using an allene acetate as intermediate.

Method for preparing vitamin A

A process for the preparation of substituted phenols, in particular, the condensation of phenols having one or more alkyl substituents with a butadiene derivative comprising at least six carbon atoms, in particular myrcene and/or .beta.-springene is disclosed. The cyclization, in the form of chromans, of the products obtained during this condensation and their hydrogenation in order to prepare vitamin E is also disclosed.

Process for the preparation of substituted phenols

A process for the preparation of vitamin A which comprises condensing ethynyl-.beta.-ionol with the acetal of a C.sub.5 allylic halide in the presence of a catalytic amount of a copper-based catalyst and a base; hydrogenating the condensed compound; eliminating the hydroxyl functional group to obtain retinal; and correcting the retinal obtained.

Process for the preparation of vitamin A and new intermediates

The present invention relates to a new method of condensing polyenic compounds wherein a compound having the formula III ##STR1## is condensed with a compound having the formula IV ##STR2## under the influence of a Lewis acid or a protic acid. R.sub.1 through R.sub.7 represent alkyl or alkenyl groups, A' is preferably chlorine, B is preferably a hydroxyl group, and n' is 0 to 10. The invention also relates to novel intermediates for use in the preparation of Vitamins A and E produced by means of the new method.

Growing community of inventors

Saint Genis Laval, France

Jean-Erick Ancel