| 摘要 |
<p>The present invention relates to new coumarin derivatives represented by the general formula I <CHEM> wherein R<1> = NH2 or -NHCH=C(CO2C2H5)2, R<2> = R<3> = R<4> = H, R<5> = F, R<1> = R<3> = NHCH=C(CO2C2H5)2, R<2> = R<4> = R<5> = H, R<1> = H or OH, R<3> = NHCH=C(CO2C2H5)2, R<2> = R<4> = R<5> = H, R<1> = OH, R<2> = R<3> = R<4> = H, R<5> = -NHCH=C(CO2C2H5)2, R<1> = R<3> = R<5> = H, R<2> = CH3 or CF3, R<4> = -NHCH=C(CO2C2H5)2, processes for the preparation thereof and their use as intermediates for the synthesis of new coumarin derivatives with potential biological action.</p> |
