The present disclosure provides compounds of formula (I) or salts thereof, wherein R1- R10 and x are defined herein; compositions containing these compounds; methods of inhibiting, reducing, or ameliorating bacterial growth on a substrate using these compound; and products such as dental care products, soaps, antibacterial products, and plastics comprise one or more compounds described herein.
Sulfoxide-mediated oxidative cross-coupling of phenols
作者:Zhen He、Gregory J. P. Perry、David J. Procter
DOI:10.1039/c9sc05668h
日期:——
A metal-free, oxidative coupling of phenols with various nucleophiles, including arenes, 1,3-diketones and other phenols, is reported. Cross-coupling is mediated by a sulfoxide which inverts the reactivity of the phenol partner. Crucially, the process shows high selectivity for cross-versus homo-coupling and allows efficient access to a variety of aromatic scaffolds including biaryls, benzofurans and
Chromium-Salen Catalyzed Cross-Coupling of Phenols: Mechanism and Origin of the Selectivity
作者:Yexenia Nieves-Quinones、Thomas J. Paniak、Young Eun Lee、Sun Min Kim、Sergei Tcyrulnikov、Marisa C. Kozlowski
DOI:10.1021/jacs.9b03890
日期:2019.6.26
chemoselective phenol cross-coupling reaction catalyzed by a Cr-salen catalyst was developed. Kinetic studies showed that the oxidation of Cr(III) to Cr(V) is the rate-determining step of the reaction. In addition, experimental stoichiometric analysis showed that a high valent Cr(V) species is the active catalyst for this process. The selectivity of the reaction was found to be determined by the cross-coupling
A simple, metal-free protocol for unsymmetrical biaryl coupling using H5IO6 is reported. H5IO6 was evaluated for a novel application in the oxidative cross-coupling of phenol-arene, phenol-phenol, and phenol-naphthol compounds. In this work, most of the couplings were completed within 30 min at ambient temperature. 30 coupling products were conveniently obtained using only 0.5 equivalent of H5IO6 in
The Interrupted Pummerer Reaction in a Sulfoxide‐Catalyzed Oxidative Coupling of 2‐Naphthols
作者:Zhen He、Alexander P. Pulis、David J. Procter
DOI:10.1002/anie.201903492
日期:2019.6.3
A benzothiopheneS‐oxide catalyst, generated in situ by sulfur oxidation with H2O2, mediates the oxidative coupling of 2‐naphthols. Key to the catalytic process is the capture and inversion of reactivity of a 2‐naphthol partner, using an interrupted Pummerer reaction of an unusualbenzothiopheneS‐oxide, followed by subsequent coupling with a second partner. The new catalytic manifold has been showcased
通过H 2 O 2硫氧化原位生成的苯并噻吩S-氧化物催化剂介导2-萘酚的氧化偶联。催化过程的关键是使用不寻常的苯并噻吩S-氧化物中断的Pummerer反应,然后与第二个配偶偶合,捕获和转化2-萘酚配偶的反应性。新的催化歧管已在生物活性天然产物(±)-尼莫酮和(±)-异麦酮的合成中得到展示。尽管Pummerer反应被广泛使用,但它们在催化中的应用却很少,我们的方法代表了一种新的无金属C-C键形成的催化流形。