(-)-Terpestacin (1a, naturally occurring enantiomer) and (+)-11-epi-terpestacin (1b) were prepared using catalyst-controlled, stereoselective intermolecular reductive couplings of alkyne 4 and aldehyde 5. Related to enantioselective methods developed in our laboratory, these stereoselective fragment couplings were instrumental in confirming that "siccanol" is not 11-epi-terpestacin, but in fact is (-)-terpestacin itself.
(-)-Terpestacin (1a,天然存在的对映体)和(+)-11-epi-terpestacin (1b)是通过使用催化剂控制的、高度对映选择性的分子间还原偶联反应制备的:使用
炔烃4和醛5为原料。与实验室开发的对映选择性方法相关联,这些高度对映选择性的片段偶联反应对于确认"siccanol"并非11-epi-terpestacin,而是作者本人即(-)-terpestacin起到了关键作用。