A series of benzylidene-1H-indol-2-one (oxindole) derivatives was synthesiz
ed and evaluated as cRaf-1 kinase inhibitors. The key features of the molec
ules were the donor/acceptor motif common to kinase inhibitors and a critic
al acidic phenol flanked by two substitutions. Diverse 5-position substitut
ions provided compounds with low nanomolar kinase enzyme inhibition and inh
ibited the intracellular MAPK pathway. (C) 2000 Elsevier Science Ltd. All r
ights reserved.