A one-pot Smilesrearrangement has been developed as a useful protocol for the straightforward synthesis of diverse N-aryl-nicotinamides. This method also provides chemoselective access toward diarylamines based on the different substitutions of the amide group. The potential application of the transformation is exemplified by the synthesis of an on-market succinate dehydrogenase inhibitor, boscalid
A series of N-phenylnicotinamides (1-40) were designed and evaluated in vitro for their COX inhibitory activities. Most of the synthesized compounds were proved to be potent and selective inhibitors of COX-1. Compound 28 showed the most potent COX-1 inhibitory activity (COX-1 IC50 = 0.68 +/- 0.07 mu M) and good selectivity (COX-2 IC50 > 100 mu M). This compound may be useful as a lead compound for superior COX-1 inhibitors. On the basis of the biological results, structure-activity relationships for the COX-1-inhibitory activities of the synthesized N-phenylnicotinamides were discussed concisely. (C) 2010 Elsevier Ltd. All rights reserved.
CATIVIELA, C.;FERNANDEZ, J.;MELENDEZ, E., J. HETEROCYCL. CHEM., 1982, 19, N 5, 1093-1097