Process for preparing pyridine-substituted amino ketal...

Details Process for preparing pyridine-substituted amino ketal... Process for preparing pyridine-substituted amino ketal...

2005-07-12

2005-07-12

Dentz, Bernard (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S338000

Reexamination Certificate

active

06916934

ABSTRACT:
The present invention relates to an efficient process for preparing derivatives of 1-(pyridinyl)-1,1-dialkoxy-2-aminoethane of the formula (I), with which compounds of the formula (I) can be prepared in high purity and yield and in the form of the free base without isolating the acetylpyridine oxime of the formula (XI) which is a critical product from a safety point of view as a solid.

REFERENCES:
patent: 4746669 (1988-05-01), Caldwell et al.
patent: 5635485 (1997-06-01), Agouridas et al.
patent: 5792871 (1998-08-01), Chartrain et al.
patent: 0291673 (1988-11-01), None
Shargi et al, Synlett, vol. 2001, issue 1, p. 99-101 (2001).
Sharma et al, J. of Organometallic Chem. vol. 664, p. 66-69 (2002).
George Roger Clemo et al., The Synthesis of Phenyl- and Pyridyl-glyoxalines, Journal Am. Soc. (1938, pp. 753-755, vol. 53).
John Y.L. Chung et al., Practical Chemoenzymatic Synthesis of a 3-Pyridylethanolamino Beta3 Adrenergic Receptor Agonist, Tetrahedron Letters (1999, pp. 6739-6743, vol. 40).
Houben-Weyl 11/1: Stickstoffverbindungen II, (1957, S. pp. 903-905).

Affiliated with

Also associated with

Rating

Process for preparing pyridine-substituted amino ketal... 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 preparing pyridine-substituted amino ketal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing pyridine-substituted amino ketal... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3409713