515-42-4Relevant articles and documents
Quantitative Treatment of Micellar Effects upon the Nucleophilicity of Halide Ions
Al-Lohedan, Hamad,Bunton, Clifford A.,Moffatt, John R.
, p. 332 - 335 (1983)
Nucleophilic attack upon methyl benzenesulfonate (1) by Cl- or Br- occurs readily in aqueous cetyltrimethylammonium chloride or bromide (CTACl or CTABr, respectively).The increase of rate constant with can be analyzed in terms of the concentration of 1 and halide ion in the micellar pseudophase, and the second-order rate constants in micellar and aqueous pseudophases are similar.
Chan-Lam-Type C-S Coupling Reaction by Sodium Aryl Sulfinates and Organoboron Compounds
Lam, Long Yin,Ma, Cong
supporting information, p. 6164 - 6168 (2021/08/16)
A Chan-Lam-Type C-S coupling reaction using sodium aryl sulfinates has been developed to provide diaryl thioethers in up to 92% yields in the presence of a copper catalyst and potassium sulfite. Both electron-rich and electron-poor sodium aryl sulfinates and diverse organoboron compounds were tolerated for the synthesis of aryl and heteroaryl thioethers and dithioethers. The mechanistic study suggested that potassium sulfite was involved in the deoxygenation of sulfinate through a radical process.
Functional Hyper-Crosslinked Polypyrene for Reductive Decolorization of Industrial Dyes and Effective Mercury Removal from Aqueous Media
Varyambath, Anuraj,Song, Wen L.,Kim, Il
, p. 1078 - 1087 (2018/11/23)
A rigid and valuable hyper-crosslinked polymer (HCP) has been synthesized from the polycyclic aromatic hydrocarbon pyrene: hyper-crosslinked polypyrene (HCPPy). HCPPy was prepared through a simple one-step Friedel-Crafts alkylation reaction that involves ZnBr2-catalyzed crosslinking in the presence of an external crosslinker, bromomethyl methyl ether (BME). Interestingly, the unreacted bromomethyl groups (?CH2Br) on the surface of HCPPy could be quantified, which later aided in modification as per our requirement. We aimed at modifying with disulfide-containing cystamine dihydrochloride (Cys-HCPPy). Cys-HCPPy exhibited an extended π-conjugated system with uniform (～1 μm diameter) morphology and high porosity (specific surface area: 445 m2 g?1). As a fundamental application, the Cys-HCPPy composite was used as a sorbent to remove Hg2+ ions from aqueous media. Thus, at pH 6, the adsorption capacity for mercury ions reached 1124.82 mg g?1 after 24 h. Furthermore, the immobilization of Ag nanoparticles on the surface of Cys-HCPPy (Ag@Cys-HCPPy) enhanced the catalytic properties, which allowed for the reductive decolorization of industrial dyes such as methylene blue, methyl orange, and Congo Red in the presence of NaBH4 as a reducing agent.
