166330-03-6Relevant articles and documents
Neighboring phenolic group-activated: Gem -difluoroallylboration of imines for the catalyst-free synthesis of gem -difluorohomoallylamines
Yang, Xing,Zhang, Feng,Zhou, Yang,Huang, Yi-Yong
, p. 3367 - 3371 (2018)
We herein report an unprecedented addition reaction of pinacol gem-difluoroallylborates and imines enabled by a neighboring phenolic group in an N-protecting group under catalyst-free conditions, thus facilitating the construction of a wide range of racemic gem-difluorohomoallylamine derivatives. Based on the control experiments, a plausible transition state via the Zimmerman-Traxler model was proposed to elucidate the significance of the neighboring phenolic group, as well as the γ-selectivity of the boronate reagents.
Structure-based development of (1-(3′-Mercaptopropanamido)methyl)boronic Acid Derived Broad-Spectrum, Dual-Action Inhibitors of Metallo- And Serine-β-lactamases
Wang, Yao-Ling,Liu, Sha,Yu, Zhu-Jun,Lei, Yuan,Huang, Meng-Yi,Yan, Yu-Hang,Ma, Qiang,Zheng, Yang,Deng, Hui,Sun, Ying,Wu, Chengyong,Yu, Yamei,Chen, Qiang,Wang, Zhenling,Wu, Yong,Li, Guo-Bo
, p. 7160 - 7184 (2019/08/28)
The emergence and spread of bacterial pathogens acquired metallo-β-lactamase (MBL) and serine-β-lactamase (SBL) medicated β-lactam resistance gives rise to an urgent need for the development of new dual-action MBL/SBL inhibitors. Application of a pharmacophore fusion strategy led to the identification of (2′S)-(1-(3′-mercapto-2′-methylpropanamido)methyl)boronic acid (MS01) as a new dual-action inhibitor, which manifests broad-spectrum inhibition to representative MBL/SBL enzymes, including the widespread VIM-2 and KPC-2. Guided by the VIM-2:MS01 and KPC-2:MS01 complex structures, further structural optimization yielded new, more potent dual-action inhibitors. Selectivity studies indicated that the inhibitors had no apparent inhibition to human angiotensin-converting enzyme-2 and showed selectivity across serine hydrolyases in E. coli and human HEK293T cells labeled by the activity-based probe TAMRA-FP. Moreover, the inhibitors displayed potentiation of meropenem efficacy against MBL- or SBL-positive clinical isolates without apparent cytotoxicity. This work will aid efforts to develop new types of clinically useful dual-action inhibitors targeting MBL/SBL enzymes.
A Modular Approach to the Asymmetric Synthesis of Cytisine
Struth, Felix R.,Hirschhaüser, Christoph
supporting information, p. 958 - 964 (2016/03/01)
The asymmetric synthesis of (+)-and (-)-cytisine starts with Matteson homologations for the construction of a chiral C3-building block. Conversion of the C3-building block into a dihydropyridone is achieved by straightforward functional group interconversions and ring closing metathesis. After bromination, this central building block was diastereospecifically converted into cytisine in five steps.
