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200517.fm Page 168 Friday, March 18, 2005 2:52 PM
2005
Fused pyridine derivatives
R 0450
Glyoxylic Acid and MP-Glyoxylate: Efficient Formaldehyde Equivalents in the
of 2-Aminoazines, Aldehydes, and Isonitriles. — A practical method for the
17- 151 3-CC
one-pot synthesis of novel 2-unsubstituted-3-aminoimidazo[1,2-a]heterocycles is
achieved. Glyoxylic acid is used as a formaldehyde equivalent in the three-component
coupling of aminoazines, aldehydes, and isonitriles. The highest yields are obtained
from either aminopyridines or aminopyrazines. — (LYON, M. A.; KERCHER*, T. S.;
Org. Lett. 6 (2004) 26, 4989-4992; Array BioPharma Inc., Boulder, CO 80301, USA;
Eng.) — Steudel
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