| 摘要 |
<p>2-(lower-alkoxy)-1-(pyridinyl)ethenyl lower-alkyl ketones of the formula in which R and R' are each lower alkyl, and PY is a 3- or 4-pyridinyl group or a 3- or 4-pyridinyl group having one or two alkyl substituents, their acid addition salts, and processes for their preparation are described. These compounds find use in the preparation of cardiotonically active 1,2-dihydro-6-(lower-alkyl)-2-oxo-5-(pyridinyl)nicotinonitriles and nicotinamides.</p> |
