Metacolchicine is a new colchicinoid isolated from the tubers of Sandersonia aurantiaca. Its unique structure featuring an additional carbon unit at C-10 position was deduced from spectroscopic analyses.
Enantioselective total synthesis of (−)-colchicine, (+)-demecolcinone and metacolchicine: determination of the absolute configurations of the latter two alkaloids
作者:Bo Chen、Xin Liu、Ya-Jian Hu、Dong-Mei Zhang、Lijuan Deng、Jieyu Lu、Long Min、Wen-Cai Ye、Chuang-Chuang Li
DOI:10.1039/c7sc01341h
日期:——
ee). Moreover, we have also achieved the firstsyntheses of (+)-demecolcinone and metacolchicine, and determined their absolute configurations. The challenging tricyclic 6-7-7 core of colchicinoids was efficiently introduced using an intramolecular oxidopyrylium-mediated [5 + 2] cycloaddition reaction. Notably, the synthesized colchicinoid 23 exhibited potent inhibitory activity toward the cell growth