Intermolecular tandem copper-catalyzed O-arylation-oxidative acylation (cross dehydrogenative coupling-CDC) has been developed under air as an oxidant. The reaction between 2,4-dihydro-3H-pyrazol-3-ones and ortho-halo aryl carboxaldehydes furnished the corresponding chromone fused pyrazoles, in a straightforward manner. The synthetic utility of the presented tandem catalysis has been demonstrated with the synthesis of an A(2)-subtype selective adenosine receptor antagonist in only two steps.[GRAPHICS]
EIDEN, F.;RADEMACHER, G., ARCH. PHARM., 1983, 316, N 1, 34-42
作者:EIDEN, F.、RADEMACHER, G.
DOI:——
日期:——
BUTLER D. E.; DEWALD H. A., J. ORG. CHEM. <JOCE-AH>, 1975, 40, NO 9, 1353-1355