Improved Synthesis of the Amine Fragment of FR901464 and Thailanstatins through the Development of a Convenient <i>N</i>-Detosylation Method
作者:Jacob P. Beard、Joseph D. Emerson、Alexander S. Jacobs、Andrew J. O’Grady、James Burrows、Kazunori Koide
DOI:10.1021/acs.joc.2c01889
日期:2022.10.7
FR901464 and thailanstatins are potent cytotoxic natural products that share an amine-containing tetrahydropyran ring. We previously reported the synthesis of the tetrahydropyran component. Here, we changed the protecting group for the amine from Boc to tosyl, improving yields and the time economy. A highlight of the revised synthetic scheme is the use of lithium, t-butanol, and ethylenediamine in
FR901464 和 thailanstatins 是有效的细胞毒性天然产物,它们共享一个含胺的四氢吡喃环。我们之前报道了四氢吡喃组分的合成。在这里,我们将胺的保护基团从 Boc 更改为甲苯磺酰基,提高了收率和时间经济性。修改后的合成方案的一个亮点是在 THF(非传统的 Birch 还原条件)中使用锂、叔丁醇和乙二胺进行N-去甲苯基化。