Stereoselective preparation of (1Z)- and (1E)-N-Boc-1-amino-1,3-dienes by stereospecific base-promoted 1,4-elimination
摘要:
The base-promoted 1,4-elimination reaction of N-Boc-1-amino-4-methoxy-2-alkene 1 is shown to proceed with perfect stereoselectivity to afford the corresponding N-Boc-1-amino-1,3-diene 2 in good yields. The reaction is highly stereospecific. The substrate E-1 gave 1Z-2 by the 'Syn-Effect' and Z-1 gave 1E-2 via formation of a chelated intermediate. Our method is widely applicable to the preparation of various types of N-Boc-1-amino-1,3-dienes 2. (C) 2014 Elsevier Ltd. All rights reserved.
[EN] BETA-LACTAMASE INHIBITORS<br/>[FR] INHIBITEURS DE BÊTA-LACTAMASES
申请人:VENATORX PHARMACEUTICALS INC
公开号:WO2017044828A1
公开(公告)日:2017-03-16
Described herein are compounds and compositions that modulate the activity of beta -lactamases. In some embodiments, the compounds described herein inhibit beta-lactamase. In certain embodiments, the compounds described herein are useful in the treatment of bacterial infections.
Fused ring aziridines as a facile entry into triazole fused tricyclic and bicyclic heterocycles
作者:Fang Fang、Megan Vogel、Jennifer V. Hines、Stephen C. Bergmeier
DOI:10.1039/c2ob07042a
日期:——
alkyne has provided a useful entry into triazole fused tricyclic heterocycles containing both the triazole ring and the oxazolidin-2-one ringsystem. The requisite azido-alkynes have been prepared via a two-step sequence from fused ring aziridines. A series of 6–12 membered rings containing both the oxazolidinone and triazole rings have been prepared. These ringsystems have been designed as conformationally
A Novel Cyclisation Strategy for the Synthesis of Lactonamycin: A New Route to Highly Functionalised Heterocyclic Rings
作者:Philip Parsons、Johnathan Board、Alexander Waters、Peter Hitchcock、Florian Wakenhut、Daryl Walter
DOI:10.1055/s-2006-951542
日期:——
A novel thermal cascade reaction equivalent to the well-known [2+2+2] cycloaddition has been developed which is clean and reliable and does not involve the use of metal ions. This highly efficient method has been used to construct a model for the synthesis of the antibiotic lactonamycin. The utility of this new sequence for the formation of furans is also reported.
A series of novel benzothiozinone (BTZ) derivatives were designed, prepared and evaluated for antituberculosis activity. Specifically, the BTZ pharmacophore is retained and the previous heterocyclic ring linker is replaced by alkynyl or vinyl linker, the resulting compounds displayed about 5−fold improved antimycobacterial activity. We further revealed that the linker attached tail group affects the
设计、制备了一系列新型苯并噻嗪酮(BTZ)衍生物并评估其抗结核活性。具体而言,保留 BTZ 药效团,并用炔基或乙烯基连接基取代先前的杂环连接基,所得化合物显示出约 5 倍的抗分枝杆菌活性。我们进一步揭示,尾部连接基团会影响化合物的代谢稳定性、效力和其他药物特性。这项工作发现了两种具有可接受的低 MIC 和改善的代谢稳定性的化合物( A1和A11 )。代表性化合物A11在急性结核感染小鼠模型中表现出杀菌功效。
Beta-lactamase inhibitors
申请人:VenatoRx Pharmaceuticals, Inc.
公开号:US10399996B2
公开(公告)日:2019-09-03
Described herein are compounds and compositions that modulate the activity of beta-lactamases. In some embodiments, the compounds described herein inhibit beta-lactamase. In certain embodiments, the compounds described herein are useful in the treatment of bacterial infections.