Process for preparing pyridine 2-carboxamides

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

546327, 502213, C07D21379, C07D21381, C07D21382, B01J 27185

Patent

active

053808614

ABSTRACT:
It has been found that pyridine-2-carboxamides of the formula ##STR1## wherein R is amino or a residue convertible into amino, and pharmaceutically usable acid addition salts of that carboxamide in which R is amino can be prepared in a simple manner and in good yield by reacting 2,5-dichloropyridine in the presence of a palladium-phosphine catalyst with an alkyne of the formula

REFERENCES:
patent: 2749350 (1956-06-01), Nowlin
patent: 3862159 (1975-01-01), Umezawa et al.
patent: 4764522 (1988-08-01), Imhof et al.
Tilley et al., Journal of Organic Chemistry, vol. 53, pp. 386-390 1988.
R. F. Heck, Palladium Reagents in Organic Synthesis, Academic Press, (1985); pp. 299-306, 348-362.
Sakamoto, et al., Condensed Heteroaromatic Ring Systems, XV, Synthesis of Pyranopyridinones From Halopryidine-carbonitriles, Chem. Pharm. Bull. 36, 1890 (1988).
Sonogashira, et al., A Convenient Synthesis of Acetylenes:Catalytic Substitutions of Acetylenic Hydrogen With Bromoalkenes Iodoarenes and Bromopyridines, Tetrahedron Letters, 50, 4467 (1975).
Lee, et al., Oxidation of Hydrocarbons, 9. The Oxidation of Alkynes by Potassium Permanganate, J. Org. Chem. 44, 2726 (1979).
Chem. Abstracts, vol. 95(9):80892s, Mar. 1981.
Chem. Abstracts, vol. 99(7): 53823w, Feb. 1983.
Chem. Abstracts, vol. 73 (25), 130851w, Dec. 1970.
Chem. Abstracts, vol. 105(11) No. 97, 323e, Sep. 15, 1986.
Chem. Abstracts, vol. 109(25), No. 231,063h, Dec. 19, 1988.
Sakamoto, et al., Palladium (O)-Catalyzed Condensation of Bromopyridines with .alpha.-substituted Acetonitriles, Heterocycles, 27(6) 1353 (1988).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Process for preparing pyridine 2-carboxamides 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 2-carboxamides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing pyridine 2-carboxamides will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-851750

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.