| 摘要 |
<p>Compounds of the formula: <CHEM> wherein Y is <CHEM> in which R is hydrogen, methyl, chloro or bromo, the R substitution being at the 3, 4 or 5 positions of the thiophene ring, R<1> is hydrogen, a lower alkyl group having 1 to 4 carbon atoms, a lower alkoxy group having from 1 to 4 carbon atoms, chloro, fluoro or bromo, the R<1> substitution being at the ortho, meta or para positions of the aroyl group, and R<2> is hydrogen or a lower alkyl group having from 1 to 4 carbon atoms. <??>These compounds are used as intermediates for the preparation of the corresponding 1-carboxylic acid compounds by hydrolysis, the latter compounds being pharmaceutically useful. </p> |
