| 摘要 |
<p>Intermediates for the total synthesis of ecteinascidins which are represented by the general formula (2) and bear the skeletal pentacyclic structure of ecteinascidins, characterized in that the 4-position OH group and trichloroethoxycarbonyl (Troc) being substituent R5 on the 12-position nitrogen atom enable introduction of various substituents under mild conditions.</p> |
