The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 2006
Filed:
Dec. 17, 2003
Anne Marie Vitrant, Itteville, FR;
Laurence Ferruccio, Vert le Grand, FR;
Charles-henry Vincent, Precy sur Oise, FR;
Anne Marie Vitrant, Itteville, FR;
Laurence Ferruccio, Vert le Grand, FR;
Charles-Henry Vincent, Precy sur Oise, FR;
Isochem, , FR;
Abstract
The invention relates to a process for the preparation of an ω-benzyl ester of an amino diacid, characterized in that the amino diacid is reacted with a benzyl alcohol derivative of formula (I)in which the Rsubstituent or substituents, which are identical or different, represent a hydrogen atom, a Cto Calkyl group, a Cto Calkoxy group or a halogen atom and n is equal to 1, 2 or 3, in the presence of at least one mol per mole of the amino diacid of an alkanesulphonic acid, optionally in the presence of a solvent. The intermediate alkanesulphonates of the ω-benzyl esters of amino diacids and the ω-benzyl esters of amino diacids are obtained with a good yield and an excellent purity by virtue of this process.