| 摘要 |
<p>Novel 3,4-dihydroisoquinoline derivatives represented by general fomula (I-a) or (I-b), novel isoquinoline derivatives derived therefrom, and processes for preparing the isoquinoline derivatives are disclosed. In the formula, X?1 and X2¿ may be the same or different and each represents a group represented by α provided that one of X?1 and X2¿ may be a hydrogen atom, X3 represents a group represented by β (wherein R?1, R2 and R3¿ may be the same or different and each represents a group selected from among alkyl, alkenyl and alkoxy groups containing 1 to 20 carbon atoms and optionally substituted and an aryl group containing 6 to 20 carbon atoms), and m represents 0 to 5.</p> |
