The analysis of two distinct strategies toward the enantioselective formal total synthesis of (+)-Gelsenicine
作者:Haofan Ji、Phil C. Knutson、Christopher M. Harrington、Yan-Ting Ke、Eric M. Ferreira
DOI:10.1016/j.tet.2023.133278
日期:2023.3
A full account of a formal enantioselective total synthesis of (+)-gelsenicine is described. Separate strategies based on catalytic cycloisomerization as the central step are considered. One plan involves chirality transfer from enantioenriched substrates, while the other employs asymmetric catalysis. The chirality transfer strategy is less effective, while in the latter, phosphoramidite- and bisphosphine-gold
描述了 (+)-格尔赛尼碱的正式对映选择性全合成的完整说明。考虑以催化环异构化为中心步骤的单独策略。一种计划涉及从对映体富集的底物进行手性转移,而另一种计划则采用不对称催化。手性转移策略效果较差,而在后者中,亚磷酰胺-和双膦-金络合物经过测试,最终在我们的钩吻生物碱合成中提供高对映体纯度的关键中间体。