Synthesis and Biological Evaluation of (−)-16-Normethyldictyostatin: A Potent Analogue of (−)-Dictyostatin
作者:Youseung Shin、Jean-Hugues Fournier、Raghavan Balachandran、Charitha Madiraju、Brianne S. Raccor、Guangyu Zhu、Michael C. Edler、Ernest Hamel、Billy W. Day、Dennis P. Curran
DOI:10.1021/ol050808u
日期:2005.7.1
(-)-16-Normethyldictyostatin has been made by total synthesis and is a potent antitumor agent in cells expressing wild-type tubulin and in one mutant cell line that is resistant to paclitaxel, but it is much less active than dictyostatin in another paclitaxel-resistant cell line where Val is substituted for Phe270. This provides strong evidence that the C16 methyl group of the dictyostatins is oriented toward Phe270 in the paclitaxel-binding site on beta-tubulin.