There are provided compounds of the formula
and pharmaceutically acceptable salts and esters thereof
wherein W, V, X, Y, A, R and R′ are as described herein.
The compounds are useful as anticancer agents.
Bifunctional Phosphonium Salt Directed Enantioselective Formal [4 + 1] Annulation of Hydroxyl-Substituted <i>para</i>-Quinone Methides with α-Halogenated Ketones
作者:Jian-Ping Tan、Peiyuan Yu、Jia-Hong Wu、Yuan Chen、Jianke Pan、Chunhui Jiang、Xiaoyu Ren、Hong-Su Zhang、Tianli Wang
DOI:10.1021/acs.orglett.9b02560
日期:2019.9.20
A highly diastereo- and enantioselective [4 + 1] cycloaddition of para-quinone methides to α-halogenated ketones was realized by bifunctional phosphonium salt catalysis, furnishing functionalized 2,3-dihydrobenzofurans in high yields and excellent stereoselectivities (>20:1 dr and up to >99.9% ee). Mechanistic observations suggested that the reaction underwent a cascade intermolecular substitution/intramolecular
DMAP Mediated Efficient Construction of Functionalized Chromenes through One‐Pot Reaction of
<i>para</i>
‐Quinone Methides with Allenoates
作者:Zefeng Song、Yuping Jia、Daizhou Zhang、De Wang
DOI:10.1002/ejoc.202100112
日期:2021.3.26
An organocatalytic Rauhut‐Currier/oxa‐Michael addition cascade reaction of hydroxylphenyl‐substituted para‐quinone methide with allenoate was reported for the first time. A series of functionalized chromenes were successfully obtained with moderate to good yields under this one‐pot cascade reaction.
Small Molecule Inhibitors of the Bacterioferritin (BfrB)–Ferredoxin (Bfd) Complex Kill Biofilm-Embedded <i>Pseudomonas aeruginosa</i> Cells
作者:Anabel Soldano、Huili Yao、Achala N. D. Punchi Hewage、Kevin Meraz、Joel K. Annor-Gyamfi、Richard A. Bunce、Kevin P. Battaile、Scott Lovell、Mario Rivera
DOI:10.1021/acsinfecdis.0c00669
日期:2021.1.8
bacterioferritin and its subsequent mobilization as Fe2+ to satisfy metabolic requirements. In Pseudomonas aeruginosa Fe3+ is compartmentalized in bacterioferritin (BfrB), and its mobilization to the cytosol requires binding of a ferredoxin (Bfd) to reduce the stored Fe3+ and release the soluble Fe2+. Blocking the BfrB-Bfd complex in P. aeruginosa by deletion of the bfd gene triggers an irreversible accumulation
细菌依赖于良好调节的铁稳态以在不利环境中生存。铁稳态机制的关键组成部分是细菌铁蛋白中Fe 3+的区室化,以及随后以Fe 2+的形式动员以满足代谢需求。在铜绿假单胞菌中, Fe 3+在细菌铁蛋白(BfrB)中区分开,并且其动员到细胞质中需要结合铁氧还蛋白(Bfd)以减少储存的Fe 3+并释放可溶性Fe 2+。通过缺失bfd基因来阻断铜绿假单胞菌中的BfrB-Bfd复合物触发Fe 3+的不可逆积累在BfrB中,伴有胞质铁缺乏和生物膜发育的显着损害。本文中我们报道了发展为在Bfd结合位点结合BfrB的小分子会阻断BfrB-Bfd复合物,抑制铜绿假单胞菌细胞中BfrB的铁动员,对浮游细胞产生抑菌作用,并对嵌入其中的细胞具有杀菌作用。成熟的生物膜。
Lewis Base Catalyzed, Sulfenium Ion Initiated Enantioselective, Spiroketalization Cascade
作者:Kimberly M. Hilby、Scott E. Denmark
DOI:10.1021/acs.joc.1c02271
日期:2021.11.5
A Lewisbasecatalyzed, enantioselective sulfenocyclization of alkenes to afford [6,6]spiroketals has been developed. The method uses a chiralLewisbase catalyst with an electrophilic sulfur source to generate enantioenriched thiiranium ion with alkenes. Upon formation, the thiiranium ion is subsequently captured in a cascade-type reaction, wherein a ketone oxygen serves as the nucleophile to open