Photochemical C–F Activation Enables Defluorinative Alkylation of Trifluoroacetates and -Acetamides
作者:Mark W. Campbell、Viktor C. Polites、Shivani Patel、Juliette E. Lipson、Jadab Majhi、Gary A. Molander
DOI:10.1021/jacs.1c11059
日期:2021.12.1
commodity feedstock: ethyl trifluoroacetate. A novel mechanistic approach was identified using our previously developed diaryl ketone HAT catalyst to enable the hydroalkylation of a diverse suite of alkenes. Furthermore, electrochemical studies revealed that more challenging radical precursors, namely trifluoroacetamides, could also be functionalized via synergistic Lewis acid/photochemical activation
尽管宝石-二氟亚甲基具有诱人的结构、物理和生化特性,但将其安装到有机结构中仍然是一项艰巨的合成挑战。一种非常有效的逆合成方法是将来自三氟甲基的单个 C-F 键功能化。这一系列攻击的最新进展使三氟甲基芳烃的 C-F 活化成为可能,但将可访问的基序限制为仅苄基宝石-二氟化支架。相比之下,三氟乙酸盐的 C-F 活化将使它们能够用作双功能宝石-二氟亚甲基合成子。在此,我们报告了一种光化学介导的商品原料脱氟烷基化方法:三氟乙酸乙酯。使用我们之前开发的二芳基酮 HAT 催化剂确定了一种新的机制方法,以实现多种烯烃的加氢烷基化。此外,电化学研究表明,更具挑战性的自由基前体,即三氟乙酰胺,也可以通过协同路易斯酸/光化学活化进行功能化。最后,该方法为 FDA 批准的药物化合物的新型宝石-二氟类似物提供了一种简洁的合成方法。
Strategy Evolution in a Skeletal Remodeling and C–H Functionalization-Based Synthesis of the Longiborneol Sesquiterpenoids
作者:Robert F. Lusi、Goh Sennari、Richmond Sarpong
DOI:10.1021/jacs.2c08136
日期:2022.9.21
Detailed herein are our synthesisstudies of longiborneol and relatednaturalproducts. Our overarching goals of utilizing a “camphor first” strategy enabled by skeletal remodeling of carvone, and late-stage diversification using C–H functionalizations, led to divergent syntheses of the target naturalproducts. Our initial approach proposed a lithiate addition to unite two fragments followed by a Conia-ene
Base-catalyzed rearrangement of .omega.-bromolongifolene
作者:Goverdhan Mehta
DOI:10.1021/jo00821a039
日期:1971.11
Mehta,G. et al., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1976, vol. 14, p. 364 - 365
作者:Mehta,G. et al.
DOI:——
日期:——
Total synthesis of nine longiborneol sesquiterpenoids using a functionalized camphor strategy
作者:Robert F. Lusi、Goh Sennari、Richmond Sarpong
DOI:10.1038/s41557-021-00870-4
日期:2022.4
inspires the development of synthesis strategies to access important classes of molecules. In the 1960s, Corey and coworkers demonstrated a visionary preparation of the terpenoid longifolene, using ‘strategic bond analysis’ to craft a synthesis route. This approach proposes that efficient synthesis routes to bridged, polycyclic structures should be formulated to introduce the bulk of the target’s topological