53269-35-5Relevant articles and documents
A Scalable Synthesis of the Blue Fluorescent Amino Acid 4-Cyanotryptophan and the Fmoc Derivative: Utility Demonstrated with the Influenza M2 Peptide Tetramer
Micikas, Robert,Acharyya, Arusha,Gai, Feng,Smith, Amos B.
, p. 1247 - 1250 (2021)
A scalable synthesis of the Fmoc-protected blue fluorescent amino acid, l-4-cyanotryptophan (W4CN), that exploits an enantioselective phase transfer-catalyzed alkylation is reported. The red-shifted emission of water-exposed W4CN residues was leveraged to investigate the solvation state of tryptophan (Trp) residues within the influenza M2 proton channel. The correlation of the channel's conformation (i.e., open or closed) with the fluorescence spectrum of a mutated W4CN residue suggests that the channel's conformational state does not impact the hydration status of the Trp residues.
Selective nickel-catalyzed dehydrogenative-decarboxylative formylation of indoles with glyoxylic acid
Yin, Zhiping,Wang, Zechao,Wu, Xiao-Feng
supporting information, p. 3707 - 3710 (2018/05/31)
Herein we present a new strategy for the dehydrogenative-decarboxylative coupling of indoles with glyoxylic acid. A broad range of indoles were transformed into the corresponding 3-formylindoles in moderate to good yields and excellent functional group tolerance. Notably, no N-formylation product was detected under our conditions.
Elaboration of thorough simplified vinca alkaloids as antimitotic agents based on pharmacophore similarity
Zheng, Jing,Deng, Lijuan,Chen, Minfeng,Xiao, Xuzhi,Xiao, Shengwei,Guo, Cuiping,Xiao, Gaokeng,Bai, Liangliang,Ye, Wencai,Zhang, Dongmei,Chen, Heru
, p. 158 - 167 (2013/10/01)
Thorough simplification of vinca alkaloids based on pharmacophore similarity has been conducted. A concise process for the syntheses of target compounds was successfully developed with yields from poor to excellent (19-98%). Cell growth inhibitory activities of these synthesized compounds were evaluated in five cancer cell lines including MCF-7, MDA-MB-231, HepG2, HepG2/ADM and K562. Almost all compounds exhibited moderate antitumor activity with optimal IC50 value of 0.89 ± 0.07 μM in MCF-7 cells. Investigation of structure-activity relationship (SAR) indicates that electron-withdraw substituents on the ring contribute to the enhancement of the antitumor activities. The simplified vinca alkaloids are confirmed as antimitotic agents, which inhibit the polymerization of tubulin just like vinblastine.