Process for the preparation of enantiomerically enriched...

Details Process for the preparation of enantiomerically enriched... Process for the preparation of enantiomerically enriched...

2004-12-09

2010-06-01

Sullivan, Daniel M (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C560S038000

Reexamination Certificate

active

07728167

ABSTRACT:
The present invention is concerned with the resolution of a mixture of enantiomers of N-protected amino acids by crystallization with enantiomerically pure N-unprotected β-amino acid derivatives.

REFERENCES:
patent: 6235927 (2001-05-01), Vries et al.
patent: 6372936 (2002-04-01), Aikins et al.
patent: 6869781 (2005-03-01), Groger et al.
patent: 2004/0029236 (2004-02-01), Groger et al.
patent: 2005/0142646 (2005-06-01), Groger et al.
patent: 102 20 740 (2003-11-01), None
patent: 103 20 211 (2004-12-01), None
patent: WO 03/016245 (2003-02-01), None
Mandi, Ouafaa EI, Synthesis of New Seven-Membered Ring Cyclic Dipeptides From Functionalized Beta-Amino Acids, 2000, Eur. J. Org. Chem., pp. 251-255.
Steer, David L., Beta-Amino Acids: Versatile Peptidomimetics, 2002, Current Medicinal Chemistry, 9, pp. 811-822.
Izumi, et al., “Herstellung und Verwendung von Aminosauren,”Angew. Chem. 90:187-194 (1978).
English translation of Izumi, et al. article, Reference C1 above.
English language abstract for DE 102 20 740 A1, Reference B2 above.
English language abstract for DE 103 20 211 A1, Reference B3 above.

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