Synthesis and Antiplasmodial Activity of New Indolone N-Oxide Derivatives
摘要:
A series of 66 new indolone-N-oxide derivatives was synthesized with three different methods. Compounds were evaluated for in vitro activity against CQ-sensitive (3D7), CQ-resistant (FcB1), and CQ and pyrimethamine cross-resistant (K1) strains of Plasmodium falciparum (P.f.), its well as for cytotoxic concentration (CC50) on MCF7 and KB human tumor Cell lines. Compound 26 (5-methoxy-indolone-N-oxide analogue) had the most potent antiplasmodial activity in vitro (< 3 nM on FcB1 and = 1.7 nM on 3D7) with a very satisfactory selectivity index (CC50 MCF7/IC50 FcB1: 14623; CC50 KB/IC50 3D7: 198823). In in vivo experiments, compound 1 (dioxymethylene derivatives of the indolone-N-oxide) showed the best antiplasmodial activity against Plasmodium berghei, 62% inhibition of the parasitaemia at 30 mg/kg/day.
Dehydroxyalkylative halogenation of C(aryl)–C bonds of aryl alcohols
作者:Mingyang Liu、Zhanrong Zhang、Huizhen Liu、Tianbin Wu、Buxing Han
DOI:10.1039/d0cc02306j
日期:——
We herein report Cu mediated side-directed dehydroxyalkylative halogenation of arylalcohols. C(aryl)–C bonds of arylalcohols were effectively cleaved, affording the corresponding aryl chlorides, bromides and iodides in excellent yields. Arylalcohols could serve as both aromatic electrophilic and radical synthetic equivalents during the reaction.
The totalsynthesis of (−)‐isoschizogamine was accomplished, featuring the construction of the quaternary carbon center by the modified Johnson–Claisen rearrangement in basic media and the facile assembly of the key tetracyclic quinolone intermediate through a cascade cyclization. The characteristic cyclic aminal was constructed by late‐stage CH functionalization at the position adjacent to the lactam
[EN] 5-METHOXY. 3'-OH UNBLOCKED, FAST PHOTOCLEAVABLE TERMINATING NUCLEOTIDES AND METHODS FOR NUCLEIC ACID SEQUENCING<br/>[FR] 5-MÉTHOXY-NUCLÉOTIDES À TERMINAISON RAPIDEMENT PHOTOCLIVABLE NON BLOQUÉS EN 3'OH ET PROCÉDÉS DE SÉQUENÇAGE D'ACIDE NUCLÉIQUE
申请人:LASERGEN INC
公开号:WO2013040257A1
公开(公告)日:2013-03-21
The present invention relates generally to 3'-OH unblocked nucleotides and nucleosides labeled and unlabeled with 5-methoxy-substituted nitrobenzyl-based photocleavable terminating groups for use in methods and systems related to DNA and RNA sequencing and analysis. These compounds may be used as reversible terminators as they exhibit fast nucleotide incorporation kinetics, single-base termination, high nucleotide selectivity, and rapid terminating group cleavage that results in a naturally occurring nucleotide.
Decarboxylative Halogenation and Cyanation of Electron-Deficient Aryl Carboxylic Acids via Cu Mediator as Well as Electron-Rich Ones through Pd Catalyst under Aerobic Conditions
作者:Zhengjiang Fu、Zhaojie Li、Yuanyuan Song、Ruchun Yang、Yanzhu Liu、Hu Cai
DOI:10.1021/acs.joc.5b02873
日期:2016.4.1
and electron-rich ones by employing Pd(II) as catalyst under aerobic conditions have been established, which lead to smooth synthesis of aryl halides (−I, Br, and Cl) through the decarboxylative functionalization of benzoic acids with readily available halogen sources CuX (X = I, Br, Cl), and easy preparation of benzonitriles from decarboxylative cyanation of aryl carboxylic acids with nontoxic and