24/06/2005 - Controller General of Patents, Designs, and Trade Marks

(21) Application No. 1502/DEL/2003 A (22) Date of filing of Application:02/12/03
(54) Title of the invention: “PROCESS FOR THE PREPARATION OF OMEGA-BENZYL ESTERS
OF AMINODICARBOXYLIC ACID.”
(51) International Classification 7 : C07C 67/035; C07B 61/00
(30) Priority Data:
(31) Document No: 02 16344
(32) Date: 20/12/2002
(33) Name of convention country: FRANCE
(66) Filed U/s 5(2): NIL
(61) Patent of addition to application No: NA
(62) Filed on: NA
(63) Divisional to Application No: NIL
(64) Filed on: NA
Total no. of Pages: 22
(57) Abstract:
(71) Name of the applicant:
ISOCHEM
Address of the Applicant:
12 Quai Henri IV, 75004 Paris,
France.
(72) Name of the Inventor:
ANNE MAARIE VITRANT
LAURENCE FERRUCCIO
CHARLES-HENRY VINCENT
The invention relates to a process for the preparation of an amino diacid, characterized in that the
amino diacid is reacted with a benzyl alcohol derivative of formula (I)
(R 1 )n
CH2OH
In which the R 1 substituent or substituents, which are identical or different, represent a hydrogen
atom, a C1 to C4 alkyl group, a C1 to C4 alkoxy group or a halogen atom and n is equal to 1, 2 to 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 are obtained with a
good yield and an excellent purity by virtue of this process.
18237