An efficient synthesis of the epothilone B derivative 26-fluoroepothilone B (1) was realized by early introduction of the synthetically demanding fluoromethyl epoxide function. The presence of a fluoro substituent results in a remarkable increase in the stability of the epoxide, which tolerates the wide range of reaction conditions required for the fragment coupling step and end game transformations.
通过尽早引入合成上要求较高的
氟甲基
环氧化物功能,实现了表霉素 B 衍
生物 26-
氟表霉素 B (1) 的高效合成。
氟取代基的存在显著提高了
环氧化物的稳定性,使其能够承受片段偶联步骤和最终转化所需的各种反应条件。