Antineoplastic Agents. 561. Total Synthesis of Respirantin<sup>1a</sup>
作者:George R. Pettit、Thomas H. Smith、Song Feng、John C. Knight、Rui Tan、Robin K. Pettit、Peter A. Hinrichs
DOI:10.1021/np0680735
日期:2007.7.1
Total synthesis of the 18-membered ring cyclodepsipeptide believed to be respirantin (1b) has been achieved. The key step in the synthesis is an intramolecular transesterification of the beta-ketoester alcohol 6 to afford the protected macrocycle 5. The synthetic product was shown to be identical to a natural product presumed to be respirantin (1b), and the absolute stereochemistry of six of the seven
已实现了据信是respirantin(1b)的18元环环二肽的全合成。合成的关键步骤是将β-酮酸酯醇6进行分子内酯交换,以提供受保护的大环5。合成产物显示与假定为respirantin(1b)的天然产物相同,并且绝对立体化学为6环二肽1b的七个不对称中心明确建立。发现Respirantin(1b)是癌细胞生长的显着抑制剂,与抗生素的抗霉素家族有关。