Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2006-07-18
2006-07-18
Tsang, Cecilia J. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S400000
Reexamination Certificate
active
07078564
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 R1substituent or substituents, which are identical or different, represent a hydrogen atom, a C1to C4alkyl group, a C1to C4alkoxy 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.
REFERENCES:
Rapoport et al, J. Org. Chem., 55, pp3068-3074.
Clayton et al, Peptides, Journal Chemical Society, 1956, pp371-380.
Clayton et al “Peptides. Part V . . . Peptide Chain”, Journal Chemical Society, 1956, pp. 371-380, XP002254230.
Stein et al, “Enzyme-Catalyzed . . . Diesters”, Journal of Organic Chemistry, vol. 60, No. 24, 1995, pp. 8110-8112, XP 002254231.
Ferruccio Laurence
Vincent Charles-Henry
Vitrant Anne Marie
Isochem
Muserlian Charles A.
Reyes Hector M.
Tsang Cecilia J.
LandOfFree
Process for the preparation of ωbenzyl esters of amino... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the preparation of ωbenzyl esters of amino..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of ωbenzyl esters of amino... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3565288