409064-73-9Relevant academic research and scientific papers
Towards new antibiotics targeting bacterial transglycosylase: Synthesis of a Lipid II analog as stable transition-state mimic inhibitor
Wang, Xiaolei,Krasnova, Larissa,Wu, Kevin Binchia,Wu, Wei-Shen,Cheng, Ting-Jen,Wong, Chi-Huey
, p. 2708 - 2712 (2018)
Described here is the asymmetric synthesis of iminosugar 2b, a Lipid II analog, designed to mimic the transition state of transglycosylation catalyzed by the bacterial transglycosylase. The high density of functional groups, together with a rich stereochemistry, represents an extraordinary challenge for chemical synthesis. The key 2,6-anti- stereochemistry of the iminosugar ring was established through an iridium-catalyzed asymmetric allylic amination. The developed synthetic route is suitable for the synthesis of focused libraries to enable the structure–activity relationship study and late-stage modification of iminosugar scaffold with variable lipid, peptide and sugar substituents. Compound 2b showed 70% inhibition of transglycosylase from Acinetobacter baumannii, providing a basis for further improvement.
Synthesis of the carbon framework of scholarisine a by intramolecular oxidative coupling
Watanabe, Tsugunori,Kato, Nobuki,Umezawa, Naoki,Higuchi, Tsunehiko
, p. 4255 - 4261 (2013/04/24)
Scholarisine A, isolated from the leaves of Alstonia scholaris, is a monoterpene indole alkaloid with an unprecedented cage-like structure. In this paper, preparation of the distinctive cage-like core skeleton of scholarisine A is described. The key feature of this synthetic strategy is an intramolecular oxidative coupling reaction at the late stage to construct a 10-oxa-tricyclo[5.3.1.03, 8]undecan-9-one structure fused with indolenine. Intramolecular oxidative coupling by using N-iodosuccinimide gave the carbon framework of scholarisine A in moderate yield, which is the first example of intramolecular oxidative-coupling reaction between non-activated enolate and indole. This study lays the foundation for continued investigations towards the total synthesis of scholarisine A. Copyright
