Preparation of acid chlorides

Details Preparation of acid chlorides Preparation of acid chlorides

C - Chemistry, Metallurgy

07

C

C07C 53/50 (2006.01) C07C 51/58 (2006.01) C07C 53/42 (2006.01)

Patent

CA 2252301

In a method of making an acid chloride having the general formula (see fig. I) where each R contains no unsaturated groups and is preferably independently selected from aliphatic from C1 to C7 and aryl from C6 to C15, a solution is formed in an inert solvent of an aldehyde having the general formula (see fig. II) and chlorine gas is sparged into said solution. The reaction between the aldehyde and the chlorine gas to produce the acid chloride is performed in the absence of a catalyst, in the absence of an initiator, and in the absence of ultraviolet light. A chlorinated acid chloride can be prepared from the acid chloride by reacting it with additional chlorine in the presence of a chlorine free radical generator.

Dans une méthode de préparation de chlorure d'acide de formule générale (voir fig. I), où aucun R ne contient de groupe insaturé et est préférablement choisi indépendamment à partir d'un aliphatique C1 à C7 et d'un aryle C6 à C15, une solution est formée dans un solvant inerte d'un aldéhyde de formule générale (voir fig. II), solution dans laquelle on fait barboter du chlore gazeux. La réaction entre l'aldéhyde et le chlore gazeux pour produire le chlorure d'acide est effectuée sans catalyseur, sans initiateur et sans lumière ultraviolette. Un chlorure d'acide chloré peut être préparé à partir du chlorure d'acide par réaction avec du chlore additionnel en présence d'un générateur de chlore radicalaire libre.

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