Enantioselective Total Syntheses of (<i>R</i>)- and (<i>S</i>)-Naphthotectone, and Stereochemical Assignment of the Natural Product
作者:Guillermo A. Guerrero-Vásquez、Flávia A. D. Galarza、José M. G. Molinillo、Carlos Kleber Z. Andrade、Francisco A. Macías
DOI:10.1002/ejoc.201501479
日期:2016.3
core of the final products was obtained by a late-stage anodic treatment. (R)-Naphthotectone was obtained in six steps from leuconaphthazarin with an overall yield of 38 % and an enantiomeric excess of 86 %. This compound was found to have the same absolute configuration as the natural product at its C-3′ stereogenic center. (S)-Naphthotectone was obtained in five steps from leuconaphthazarin with an
Enantioselective total synthesis of the proposed structure of macrolide iriomoteolide-1b
作者:Zhengqing Ye、Tingyi Gao、Gang Zhao
DOI:10.1016/j.tet.2011.06.025
日期:2011.8
an enantioselective organocatalytic transfer hydrogenation of enal, a Julia–Kocienski olefination to establish the C15–C16 E-olefin moiety, a Kulinkovich reaction associated with cyclopropyl-allyl rearrangement to produce allyl stannane and ytterbium triflate and carboxylic acid promoted allylation between allyl stannane and aldehyde with tertiary alcohol at the α-position. The construction of macrolide
Synthetic Studies towards Iriomoteolide-1a: Construction of the C13-C23 Fragment
作者:Gang Zhao、Zhengqing Ye、Lisheng Deng、Shan Qian
DOI:10.1055/s-0029-1217728
日期:2009.9
A stereoselective synthesis of the C13-C23 segment of iriomoteolide-1a was achieved using, as key steps, a highly stereocontrolled crotylation to build the stereocenters at C18 and C19 and a Julia-Kocienski olefination to establish the C15-C16 E-olefin moiety.
Total Synthesis of the Death Cap Toxin Phalloidin: Atropoisomer Selectivity Explained by Molecular‐Dynamics Simulations
作者:Guiyang Yao、Jan‐Oliver Joswig、Bettina G. Keller、Roderich D. Süssmuth
DOI:10.1002/chem.201901888
日期:2019.6.18
and in a fluorescently labeled form widely used as a probe for actin binding. Herein, we report the enantioselective synthesis of the key amino acid (2S,4R)‐4,5‐dihydroxy‐leucine as a basis for the first totalsynthesis of phalloidin, which was accomplished by two different synthesis strategies. Molecular‐dynamics simulations provided insights into the conformational flexibility of peptide intermediates