Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2005-01-24
2008-08-26
Dentz, Bernard (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C548S421000, C548S452000, C549S336000, C549S439000
Reexamination Certificate
active
07417153
ABSTRACT:
A method for the production of acetals and ketals of 3-amino-5-(hydroxymethyl) cyclopenlane-1,2-diols of formula (I):(and/or the enantiomer), where R1is H, C1-6-alkyl, C3-8-cycloalkyl or benzyl and (i) R2is methyl and R3is ethyl, (ii) R2is H and R3is C1-6-alkyl or phenyl or (iii) R2and R3together form a group of formula —(CH2)n— with n=4 to 6, present as free amines or as salts of di- or tri-basic organic acids, starting from 2-acetyl-2-aza-bicyclo[2.2.1]hept-5-en-3-one of formula (II):(and/or the enantiomer). The method is equally useful, depending on the starting material, for the production of enantiomerically-pure compounds, or mixtures with arbitrary enantiomeric content.
REFERENCES:
patent: 5364864 (1994-11-01), Spada et al.
patent: 5631383 (1997-05-01), Largeau et al.
patent: 5670649 (1997-09-01), Largeau et al.
patent: 5684159 (1997-11-01), O'Brien et al.
patent: 5808093 (1998-09-01), O'Brien et al.
patent: 5831096 (1998-11-01), Leon et al.
patent: 5886192 (1999-03-01), Leon et al.
patent: 6376472 (2002-04-01), Myers et al.
patent: 6780634 (2004-08-01), Bernegger-Egli et al.
patent: 2002/0099030 (2002-07-01), Myers et al.
patent: 2003/0069423 (2003-04-01), Ayers et al.
patent: 2004/0167351 (2004-08-01), Bernegger-Egli et al.
patent: 95/28160 (1995-10-01), None
patent: 97/03053 (1997-01-01), None
patent: 98/01426 (1998-01-01), None
patent: 00/03032 (2000-01-01), None
patent: 00/23447 (2002-04-01), None
patent: 02/091988 (2002-11-01), None
Brieden Walter
Griffiths Gareth-John
Lange Silvia
Dentz Bernard
Fisher Christen & Sabol
Lonza AG
LandOfFree
Method for the production of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for the production of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the production of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4011295