Synthesis of a novel bicyclic scaffold inspired by the antifungal natural product sordarin
作者:Yibiao Wu、Chris Dockendorff
DOI:10.1016/j.tetlet.2018.07.064
日期:2018.9
A simplified bicyclicscaffold inspired by the antifungal natural product sordarin was designed and synthesized which maintains the carboxylic acid/aldehyde (or nitrile) pharmacophore. Docking studies with the target for sordarin, the fungal protein eukaryotic elongation factor 2 (eEF2), suggested that the novel scaffolds may bind productively. A densely functionalized chiral cyclopentadiene was constructed
Synthetic studies directed toward the total synthesis of a jatrophane diterpene
作者:Priya Mohan、Krishna Koushik、Michael J. Fuertes
DOI:10.1016/j.tetlet.2014.09.128
日期:2015.1
Jatrophanediterpenes are of significant biological importance as they have shown a remarkable potential as a Pgp inhibitor. These diterpenes have a characteristic framework. Synthesis of an advanced synthon was achieved in high yielding steps. The methyl group at C13 was installed using a zinc mediated crotylation. An alkoxy mediated hydrozirconation–iodination on propargylic alcohol to provide vinyl
The synthesis of α-fluoroacrylates and α-bromo-α-fluoroalkenes was achieved in very good yields using aldehydes and ketones, triphenylphosphine, diethylzinc as promoter, and ethyl dibromofluoroacetate or dibromofluoromethane, respectively. A change in the addition sequence was critical in order to obtain exclusively α-fluoroacrylates in good yields.
Synthesis of vinyliodides: progress toward the total synthesis of a jatrophane diterpene
作者:Priya Mohan、Michael J. Fuertes
DOI:10.1016/j.tetlet.2013.05.024
日期:2013.7
A noticeable effort toward the totalsynthesis of a jatrophane diterpene has been made via the synthesis of various vinyliodides utilizing highly stereoselective Tanino–Miyashita olefination reaction; and utilizing the dithiane moiety as an acyl anion equivalent.
Remarkable rate acceleration of the solvent-free Baeyer–Villiger reaction on the surface of NaHCO3 crystals for sterically congested cyclic and acyclic ketones
Baeyer-Villiger reactions of sterically crowded cyclic and acyclic ketones are remarkably accelerated by carrying out the reactions under solvent-free conditions in the presence of powdered NaHCO3. The corresponding lactones and esters have been obtained in excellent yields. (C) 2002 Elsevier Science Ltd. All rights reserved.