We attempted to optimize sulfonamide-based non-alkyne LpxCinhibitors by focusing on improvements in enzyme inhibitory and antibacterialactivity. It was discovered that inhibitors possessing 2-aryl benzofuran as a hydrophobe exhibited good activity. In particular, compound 21 displayed impressive antibacterialactivity (E. coli MIC = 0.063 μg/mL, K. pneumoniae MIC = 0.5 μg/mL, and P. aeruginosa MIC = 0
SuFExable Isocyanides for Ugi Reaction: Synthesis of Sulfonyl Fluoro Peptides
作者:Shuheng Xu、Sunliang Cui
DOI:10.1021/acs.orglett.1c01734
日期:2021.7.2
isocyanides were first developed as a new type of SuFExable synthon, and they are used as building blocks in the Ugireaction (U-4CR). The Ugireaction was established and the substrate scope was investigated, and various sulfonyl fluoro α-amino amides and peptides could be reached in a one-step synthesis. Therefore, this protocol opens a new vision for SuFExable building blocks and click chemistry, and it also
在此,磺酰氟异氰化物首先被开发为一种新型的 SuFExable 合成子,它们被用作 Ugi 反应 (U-4CR) 的构建单元。建立了Ugi反应并考察了底物范围,一步合成可得到各种磺酰氟α-氨基酰胺和多肽。因此,该协议为 SuFExable 构建块和点击化学开辟了新视野,它还提供了一种独特的磺酰氟肽方法。
Platinum-Catalyzed α,β-Unsaturated Carbene Formation in the Formal Syntheses of Frondosin B and Liphagal
作者:Khoi Q. Huynh、Curtis A. Seizert、Tarik J. Ozumerzifon、Paul A. Allegretti、Eric M. Ferreira
DOI:10.1021/acs.orglett.6b03682
日期:2017.1.6
Formalsyntheses of tetracyclic terpenoids frondosin B and liphagal are described. Both synthetic routes rely on the use of platinum-catalyzed α,β-unsaturated carbene formation for the key C–C bond forming transformations. The successful route toward frondosin B utilizes a formal (4 + 3) cycloaddition, while the liphagal synthesis features the vinylogous addition of an enol nucleophile as a key step
作者:Frédéric Liron、Francesco Fontana、Jean-Olivier Zirimwabagabo、Guillaume Prestat、Jamshid Rajabi、Concetta La Rosa、Giovanni Poli
DOI:10.1021/ol9017326
日期:2009.10.1
Carpanone has been stereoselectively synthesized in 55% yield and six steps from sesamol. The key step of the synthetic sequence is the direct introduction of the propenyl side chain via a Suzuki−Miyaura cross-coupling reaction. The subsequent Pd(II)-catalyzed oxidative coupling yields carpanone as a single diastereoisomer independently of the geometric configuration of the starting precursor. A new