The acid precursors of the title compounds were prepared from methyl 2-amino-3-formylbenzoate (3), by Friedlander synthesis with o-methoxy- and o-nitro-phenylacetic acids, phenylpyruvic acid and benzo[b]thiophen-2-one, respectively. Except for the last example, cyclization of an initial 3-arylquinoline derivative was then required to give the tetracycle. Growth inhibition properties of the carboxamides in a series of cancer cell lines were measured for comparison with previous data for an isomeric series. In all cases, the present set were found to be less active.
The acid precursors of the title compounds were prepared from methyl 2-amino-3-formylbenzoate (3), by Friedlander synthesis with o-methoxy- and o-nitro-phenylacetic acids, phenylpyruvic acid and benzo[b]thiophen-2-one, respectively. Except for the last example, cyclization of an initial 3-arylquinoline derivative was then required to give the tetracycle. Growth inhibition properties of the carboxamides in a series of cancer cell lines were measured for comparison with previous data for an isomeric series. In all cases, the present set were found to be less active.
The acid precursors of the title compounds were prepared from methyl 2-amino-3-formylbenzoate (3), by Friedlander synthesis with o-methoxy- and o-nitro-phenylacetic acids, phenylpyruvic acid and benzo[b]thiophen-2-one, respectively. Except for the last example, cyclization of an initial 3-arylquinoline derivative was then required to give the tetracycle. Growth inhibition properties of the carboxamides in a series of cancer cell lines were measured for comparison with previous data for an isomeric series. In all cases, the present set were found to be less active.