One-Pot Synthesis of Diazine-Bridged Bisindoles and Concise Synthesis of the Marine Alkaloid Hyrtinadine A
作者:Boris O. A. Tasch、Eugen Merkul、Thomas J. J. Müller
DOI:10.1002/ejoc.201100680
日期:2011.8
N-Boc-protected 3-iodoindoles and 3-iodo-7-azaindole in a pseudo three-component reaction involving a one-potMasudaborylation–Suzukiarylationsequence. Some of the title compounds display promising cytotoxic properties. The versatility of this methodology is illustrated by a very concise total synthesis of the marine alkaloid hyrtinadine A.
Construction of Cyclopenta[<i>b</i>]indol-1-ones by a Tandem Gold(I)-Catalyzed Rearrangement/Nazarov Reaction and Application to the Synthesis of Bruceolline H
作者:Dina Scarpi、Martina Petrović、Béla Fiser、Enrique Gómez-Bengoa、Ernesto G. Occhiato
DOI:10.1021/acs.orglett.6b01990
日期:2016.8.5
A tandemgold(I)-catalyzed rearrangement/Nazarov reaction of enynyl acetates which efficiently provides cyclopenta[b]indol-1-ones as useful precursors for the synthesis of natural and bioactive compounds is described. The synthetic potential of the methodology is demonstrated by the first total synthesis of bruceolline H.
描述了串联的金(I)催化的乙酸烯丙酯的重排/纳扎罗夫反应,其有效提供环戊[ b ]吲哚-1-酮作为有用的前体,用于合成天然和生物活性化合物。该方法的合成潜力通过首次合并布鲁索醇H来证明。
Total Synthesis of Spirotryprostatins through Organomediated Intramolecular Umpolung Cyclization
作者:Yong-Kai Xi、Hongbin Zhang、Rui-Xi Li、Shi-Yuan Kang、Jin Li、Yan Li
DOI:10.1002/chem.201806411
日期:2019.2.26
reports a new method for the synthesis of biologically important DKP scaffolds based on an intramolecular nucleophilic α‐addition of general amidestowards an alkynamide system. The utility of this umpolung cyclization mediated by trimethyl phosphine and l‐glutamic acid is highlighted by its application to the concise total syntheses of 6‐methoxyspirotryprostatin B (the first total synthesis), spirotryprostatin A
Cation-πinteractions are the major noncovalent interactions for molecular recognition and play a central role in a broad area of chemistry and biology. Despite tremendous success in understanding the origin and biological importance of cation-πinteractions, the design and synthesis of stronger cation-πinteractions remain elusive. Here, we report an approach that greatly increases the binding energy
Developing DYRK inhibitors derived from the meridianins as a means of increasing levels of NFAT in the nucleus
作者:Simon J. Shaw、Dane A. Goff、Nan Lin、Rajinder Singh、Wei Li、John McLaughlin、Kristen A. Baltgalvis、Donald G. Payan、Todd M. Kinsella
DOI:10.1016/j.bmcl.2017.03.037
日期:2017.6
A structure-activity relationship has been developed around the meridianin scaffold for inhibition of Dyrk1a. The compounds have been focussed on the inhibition of kinase Dyrk1a, as a means to retain the transcription factor NFAT in the nucleus. NFAT is responsible for up-regulation of genes responsible for the induction of a slow, oxidative skeletal muscle phenotype, which may be an effective treatment for diseases where exercise capacity is compromised. The SAR showed that while strong Dyrk1a binding was possible with the meridianin scaffold the compounds have no effect on NFAT localisation, however, by moving from the indole to a 6-azaindole scaffold both potent Dyrk1a binding and increased NFAT residence time in the nucleus were obtained - properties not observed with the reported Dyrk1a inhibitors. One compound was shown to be effective in an ex vivo muscle fiber assay. The increased biological activity is thought to arise from the added interaction between the azaindole nitrogen and the lysine residue in the back pocket. (C) 2017 Elsevier Ltd. All rights reserved.