Formal Synthesis of (+)‐Laurencin by Gold(I)‐Catalyzed Intramolecular Dehydrative Alkoxylation
作者:Megan L. Lanier、Hyeri Park、Paramita Mukherjee、Jacob C. Timmerman、Anthony A. Ribeiro、Ross A. Widenhoefer、Jiyong Hong
DOI:10.1002/chem.201700499
日期:2017.5.29
8‐Membered cyclic ethers are found in a wide range of naturalproducts; however, they are challenging synthetic targets due to enthalpic and entropic barriers. The gold(I)‐catalyzed intramolecular dehydrative alkoxylation of ω‐hydroxy allylic alcohols was explored to stereoselectively construct α,α′‐cis‐oxocenes and further applied in a formalsynthesis of (+)‐laurencin. The gold(I)‐catalyzed intramolecular
Hydrosilylation-Promoted Furan Diels–Alder Cycloadditions with Stereoselectivity Controlled by the Silyl Group
作者:Zhi-Yun Liu、Ming Zhang、Xiao-Chen Wang
DOI:10.1021/jacs.9b11909
日期:2020.1.8
unprecedented B(C6F5)3-catalyzed cascade reaction of N-allyl-N-furfurylamides involving an initial intramolecularfuranDiels-Alderreaction and subsequent ether cleavage. The reaction has a broad substrate scope, even tolerating a trialkyl-substituted olefin as the dienophile, which has not previously been observed with conventional furanDiels-Alderreactions. In addition, the relative configuration
The resorcylicacidlactones (RAL) are endowed with diverse biological activity ranging from transcription factor modulators (zearalenone and zearalenol) to HSP90 inhibitors (radicicol and pochonin D) and reversible (aigialomycin D) as well as irreversible kinase inhibitors (hypothemycin and other RAL containing a cis‐enone). Our interest in broadening the diversity of this family beyond naturally
Chemoenzymatic Late‐Stage Modifications Enable Downstream Click‐Mediated Fluorescent Tagging of Peptides
作者:Alessandro Colombano、Luca Dalponte、Sergio Dall'Angelo、Claudia Clemente、Mohannad Idress、Ahmad Ghazal、Wael E. Houssen
DOI:10.1002/anie.202215979
日期:——
suitable for copper-catalyzed azide-alkyne cycloaddition, metathesis, and inverse-electron-demand Diels-Alder (IEDDA) reactions. A 10-mer tryptophan-containing macrocyclic peptide was tailored by AcyF, and the resulting modified peptide was successfully labelled with a tetrazine–fluorescein conjugate by IEDDA.