Lewis Acid Catalyzed Nucleophilic Ring Opening and 1,3-Bisfunctionalization of Donor–Acceptor Cyclopropanes with Hydroperoxides: Access to Highly Functionalized Peroxy/(α-Heteroatom Substituted)Peroxy Compounds
作者:Kuldeep Singh、Tishyasoumya Bera、Vandana Jaiswal、Subrata Biswas、Biplab Mondal、Dinabandhu Das、Jaideep Saha
DOI:10.1021/acs.joc.8b02561
日期:2019.1.18
catalyzed ring opening reaction of Donor–Acceptor (D–A) cyclopropanes with alkyl hydroperoxides is reported to furnish various peroxycarbonyls and 1,3-haloperoxygenated compounds in good to excellent yields. This method adds another instance to scarcely reported noncyclilizing 1,3-bisfunctionalization of D–A cyclopropanes with two different functional groups and relies on the dual role of peroxide as nucleophile
Novel series of 1,2,4-trioxane derivatives as antimalarial agents
作者:Mithun Rudrapal、Dipak Chetia、Vineeta Singh
DOI:10.1080/14756366.2017.1363742
日期:2017.1.1
properties based on Lipinski's rule of five with additional physicochemical and ADMET parameters. In view of having antimalarial potential, 1,2,4-trioxane derivative(s) reported herein may be useful as novel antimalarial lead(s) in the discovery and development of future antimalarial drug candidates as P. falciparum falcipain 2 inhibitors against resistant malaria.
combining an iodo-BODIPY photosensitizer and quinine was evaluated in the competitive photooxygenation of non-hydrogen and hydrogen-bond-donor substrates. The ability of quinine to activate hydrogen-bond-donor substrates towards photooxygenation was reported and the results were benchmarked with photooxygenation experiments in the absence of quinine.
further validated the results of in vitro antimalarial activity. Trioxane derivatives exhibited good binding affinity for the P. falciparum cysteine protease falcipain 2 receptor (PDB id: 3BPF) with well defined drug-like and pharmacokinetic properties based on Lipinski’s rule of five with additional physicochemical and ADMET parameters. In view of having antimalarial potential, newly reported 1,2,4-trioxane
Telescoped Continuous Flow Synthesis of 2-Substituted 1,4-Benzoquinones via Oxidative Dearomatisation of para-Substituted Phenols Using Singlet Oxygen in Supercritical CO2
作者:Michael W. George、Bruna L. Abreu、Hamza Boufroura、Jonathan C. Moore、Martyn Poliakoff
DOI:10.1055/s-0041-1737413
日期:2022.8
This paper describes a continuous multi-step synthesis in supercritical CO2. A continuous flow synthesis of 2-substituted 1,4-benzoquinones is reported, and details of the high-pressure reactors are given. This proceeds via the telescoped dearomatisation of p-substituted phenols usingsingletoxygen in supercritical CO2 and an acid-mediated C–C migration. The process has a short residence time of 30
本文描述了在超临界 CO 2中的连续多步合成。报道了2-取代的1,4-苯醌的连续流动合成,并给出了高压反应器的详细信息。这通过在超临界 CO 2中使用单线态氧和酸介导的 C-C 迁移对p取代的苯酚进行伸缩脱芳构化。该工艺的停留时间很短,仅为 30 分钟,总产率和预计产率分别高达 83% 和 9 克/天。该方法能够从光生单线态氧中安全有效地合成 2-取代的 1,4-苯醌,以及廉价且易于获得的p-取代的酚类。该程序具有高原子效率、低光催化剂负载,并用具有潜在危险和腐蚀性的试剂和溶剂替代分子氧、CO 2和危害较小的固体负载酸 Amberlyst-15。