Process for preparing amino acid esters and their acid...

Details Process for preparing amino acid esters and their acid... Process for preparing amino acid esters and their acid...

2008-07-01

2008-07-01

Kumar, Shailendra (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C560S155000, C554S161000

Reexamination Certificate

active

11061420

ABSTRACT:
The invention provides a process for preparing amino acid esters and/or their acid addition salts from monomeric or polymeric amino acids, peptides, proteins and alcohols, which comprises carrying out the reaction in supercritical alcohols, preferably at pressures and temperatures which are at least 5% above the critical parameters, the alcohols serving both as the solvent and as reactants.

REFERENCES:
Angier et al, Journal of Organic Chemistry, 21, 1540-1543, 1956.
1) Becker et al,Organikum, “Reactions of Carbonyl Compounds”, pp. 474-480, Germany.
2) G.C. Barrett,Amino Acid Derivatives A Practical Approach, “Reactions at the Carboxy Group of an Amino Acid—Esterification of Amino Acids”, pp. 38-49.
3) Emil Fischer,Bertichte Der Deutschen Chemischen Gesellschaft, “Synthese von Polypeptiden”, pp. 2893-2931 (1906).
4) M. Brenner, et al,Helvetica Chimica Acta, “Herstellung von Alpha-Aminosaureestern durch Alkohlyse der Methylester”, vol. XXXVI, No. 136-137, pp. 1109-1115, (1953); and.
5) M. Dymicky et al,Analytical Biochemistry, An International Journal, “A General, Highly Efficient Azeotropic Method of Esterification of Amino Acids”, vol. 41, No. 1, pp. 487-491 (1971).

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