Abstract: Provided are improved processes for the preparation of 1-aryl pyrazole compounds of formula (I) and (IB): which are substituted at the 5-position of the pyrazole ring with a carbon-linked functional group. The process described are efficient and scalable and do not utilize hazardous sulfenyl halide reagents.

Abstract: Provided are improved processes for the preparation of 1-aryl pyrazole compounds of formula (I) and (IB): which are substituted at the 5-position of the pyrazole ring with a carbon-linked functional group. The process described are efficient and scalable and do not utilize hazardous sulfenyl halide reagents.

Abstract: Provided are improved processes for the preparation of 1-aryl pyrazole compounds of formula (I) and (IB): which are substituted at the 5-position of the pyrazole ring with a carbon-linked functional group. The process described are efficient and scalable and do not utilize hazardous sulfenyl halide reagents.

Abstract: Provided are improved processes for the preparation of 1-aryl pyrazole compounds of formula (I) and (IB): which are substituted at the 5-position of the pyrazole ring with a carbon-linked functional group. The process described are efficient and scalable and do not utilize hazardous sulfenyl halide reagents.

Abstract: New .beta.-phenylisoserine derivative of formula (I), its preparation and its use as intermediate in the synthesis of taxol or of its derivatives.

Abstract: A method for preparing .beta.-phenylglycidic-(2R, 3R) acid optionally in the form of salt or ester by precipitation of the salt of the .beta.-phenylglycidic-(2R,3R) acid with (+)-.alpha.-methylbenzylamine-(R) in a solution of a mixture of salts of cis and trans .beta.-phenylglycidic acids with (+)-.alpha.-methylbenzylamine(R)- and the use of the resulting product for preparing taxol and its analogs.

Abstract: The invention relates to an N-sulfomethylglycinate of formula:HO.sub.3 S--CH.sub.2 --NH--CH.sub.2 --COOR.sub.1 (I)COOR.sub.1 being a hydrolysable carboxylic ester group.It also relates to a process for the preparation of the compound of formula (I) consisting in putting in contact sulfur dioxide, formaldehyde, and glycine in the presence of a R.sub.1 OH alcohol, or glycinate.It also relates to the use of the compound of formula (I) for the preparation of herbicides of the glyphosate type of reaction with a phosphite or a phosphonate of formula (R.sub.2 O).sub.2 P (O) H in which (R.sub.2 O).sub.2 P is a hydrolysable phosphonic ester group, then optionally by a subsequent hydrolysis reaction.

Abstract: Optionally halogenated tertiary allyl esters are prepared by reaction of an alkali metal salt of a carboxylic acid with an optionally halogenated primary and/or tertiary allyl halide or mixture thereof in the presence of as catalyst a cuprous salt together with a quaternary ammonium salt or a phosphonium salt.

Abstract: The invention relates to an N-sulfomethylglycinate of formula:HO.sub.3 S--CH.sub.2 --NH--CH.sub.2 --COOR.sub.1 (I)COOR.sub.1 being a hydrolysable carboxylic ester group.It also relates to a process for the preparation of the compound of formula (I) consisting in putting in contact sulfur dioxide, formaldehyde, and glycine in the presence of a R.sub.1 OH alcohol, or glycinate.It also relates to the use of the compound of formula (I) for the preparation of herbicides of the glyphosate type of reaction with a phosphite or a phosphonate of formula (R.sub.2 O).sub.2 P(O) H in which (R.sub.2 O).sub.2 P is a hydrolysable phosphonic ester group, then optionally by a subsequent hydrolysis reaction.

Abstract: The invention relates to compounds of formula: ##STR1## in which R.sup.4 is a group which can be hydrogenolyzed, R and R.sup.1 are alkyl groups, X.sup.- is an HSO.sub.4.sup.-, Cl.sup.- or R.sup.7 SO.sub.3.sup.- anion and to a process for the preparation of the compounds of formula (I) by the hydrolysis of the compounds of formula (II): ##STR2## in which R.sup.2 and R.sup.3 are alkyl groups linked to the oxygen via a secondary carbon, using sulphuric or hydrochloric acid. The invention also relates to the use of compounds of formula (I) for the preparation of herbicide by the hydrogenolysis of the compounds of formula (I).

Abstract: Hydroxyalkylating agents of formula: ##STR1## in which R denotes alkyl, n is 2 or 3, R.sub.1 denotes hydrogen or alkyl and R.sub.2 denotes alkyl an unsubstituted or substituted phenyl or ##STR2## are useful inter alia for the preparation of 1-(hydroxyalkyl)imidazoles. They are made by reaction of a sulphonic acid or dimethyl sulphate with a corresponding decarboxylate ester.

Abstract: A process for the preparation of an aromatic ether of general formula: ##STR1## by the action of 3-chloro-1,2-propanediol sulfate on a phenol of general formula:Ar--OHin the presence of an inorganic base.Use of a product obtained according to the process for the preparation of adrenergic .beta.-blockers.

Abstract: Process for preparing 1-alkyl-5-nitroimidazoles of formula: ##STR1## which comprises reacting an alkyl sulphate with an imidazole derivative of general formula: ##STR2## in an organic solvent, and then hydrolyzing or alcoholyzing the product obtained. In the formulae (I) and (II), R denotes hydrogen, unsubstituted or substituted alkyl, aryl or cycloalkyl. In the formula (I), R.sub.1 denotes alkyl. In the formula (II), X denotes a group which can be removed by hydrolysis or alcoholysis.

Abstract: Process for preparing 1-(hydroxyalkyl)nitroimidazoles of formula: ##STR1## which comprises reacting a sulphite or diacetate of an alkylenediol of formula:HO-(CH.sub.2).sub.n -OH (II)in the presence of a strong acid (sulphuric acid) with an imidazole derivative of formula: ##STR2## followed by hydrolizing or alcoholizing the product obtained. In the formulae (I) and (III), R denotes hydrogen or hydrocarbon. In the formulae (I) and (II), n is 2 or 3. In the formula (III), X denotes hydrogen or a radical which can be removed by hydrolysis or alcoholysis.

Abstract: Hydroxyalkylating agents of formula: ##STR1## in which R denotes alkyl, n is 2 or 3, R.sub.1 denotes hydrogen or alkyl and R.sub.2 denotes alkyl an unsubstituted or substituted phenyl or ##STR2## are useful inter alia for the preparation of 1-(hydroxyalkyl)imidazoles. They are made by reaction of a sulphonic acid or dimethyl sulphate with a corresponding decarboxylate ester.

Abstract: Process for preparing 1-(hydroxyalkyl)nitroimidazoles of formula: ##STR1## which comprises reacting an alkylene sulphate of formula: ##STR2## with an imidazole derivative of formula: ##STR3## followed by hydrolyzing or alcoholyzing the product obtained. In the formulae (I) and (II), n is 2 or 3; in the formulae (I) and (III), R denotes hydrogen or hydrocarbon radical; and in the formula (III), X denotes hydrogen or a radical that can be removed by hydrolysis or alcoholysis.

Abstract: Cyclic sulphates of formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6, which are identical or different, each denote hydrogen, halogen, alkyl, alkoxy, aryloxy or alkoxycarbonyl and n is 0 or 1, are prepared by rapid reaction, at a temperature of 150.degree. to 250.degree. C.

Abstract: Primary and/or tertiary allyl halides are prepared by reaction of a hydrogen halide (e.g. hydrogen chloride) with a terminal conjugated diene (e.g. myrcene, .beta.-farnesene, .beta.-springene or 15-chloro-.beta.-springene) in the presence of, as catalyst, a cuprous halide together with a quaternary ammonium salt or a phosphonium salt containing at most 16 carbon atoms, or a salt of a tertiary amine containing at most 10 carbon atoms, the reaction being carried out in an organic solvent in which the catalyst complex is soluble.

Abstract: Hexadecene derivatives of the formulae: ##STR1## and ##STR2## in which X and X.sub.1, which may be identical or different, each represent hydrogen or chlorine, and their mixtures, are useful in the preparation of tocopherol and tocopherol acetate.

Abstract: Tocopherol derivatives of the formula: ##STR1## in which X and X.sub.1, which may be identical or different, each represent hydrogen or chlorine and their acetates are useful in the synthesis of vitamin E.