硫化物-亚砜有氧光氧化在有机化学和药物化学中引起了极大的兴趣;然而,开发无需额外添加剂的高效且简便的异相光催化系统仍然具有挑战性。在此,我们有意设计并合成了两种基于多金属氧酸盐(POM)的金属紫素骨架,其公式为[M II (4-PBPY) 2 (H 2 O)][M II (H 2 O) 4 ][Co III 2 Mo VI 10 H 4 O 38 ]· n H 2 O(M = Cu,n = 10(对于1);M = Co,n= 11 for 2 ),通过温和的一步合成策略制备并详细表征。X 射线单晶衍射分析表明,它们呈现出由两个平行的金属紫层形成的二维层状结构,该层由二聚埃文斯-肖厄尔型 POM 支撑。POM与金属紫框架的连接使电子更容易流向POM端口,理论上可以进一步诱导O 2产生活性氧(O 2 •– )以氧化底物形成目标产物。正如预期的那样,1和2在硫化物的氧化中表现出出色的光催化活性。
Synergistic cooperative effect of CF<sub>3</sub>SO<sub>2</sub>Na and bis(2-butoxyethyl)ether towards selective oxygenation of sulfides with molecular oxygen under visible-light irradiation
作者:Kai-Jian Liu、Zheng Wang、Ling-Hui Lu、Jin-Yang Chen、Fei Zeng、Ying-Wu Lin、Zhong Cao、Xianyong Yu、Wei-Min He
DOI:10.1039/d0gc02663h
日期:——
visible-light-initiated oxygenation of sulfides at ambient temperature under transition-metal-, additives-free and minimal solvent conditions. The synergistic catalytic efforts between CF3SO2Na and 2-butoxyethyl ether represents the key promoting factor for the reaction.
一种安全,实用,环保的方法,可在环境温度下,无过渡金属,无添加剂且溶剂最少的条件下,通过可见光引发的硫化物氧合转换合成亚砜和砜。CF 3 SO 2 Na和2-丁氧基乙基醚之间的协同催化作用是反应的关键促进因素。
Selective oxidation of (hetero)sulfides with molecular oxygen under clean conditions
作者:Kai-Jian Liu、Ji-Hui Deng、Jie Yang、Shao-Feng Gong、Ying-Wu Lin、Jun-Yi He、Zhong Cao、Wei-Min He
DOI:10.1039/c9gc03713f
日期:——
into distinct high-value products is a particularly attractive concept and a daunting synthetic challenge. In the present work, the first example of efficient and selectiveoxidation of sulfides to sulfones and sulfoxides using molecularoxygen under clean conditions was established.
Studies on the metabolism of the thiofurans furfuryl mercaptan and 2-methyl-3-furanthiol in rat liver
作者:Brian G. Lake、Roger J. Price、David G. Walters、John C. Phillips、Philip J. Young、Timothy B. Adams
DOI:10.1016/s0278-6915(03)00213-8
日期:2003.12
The metabolism of two thiofurans, namely furfuryl mercaptan (FM) and 2-methyl-3-furanthiol (MTF), to their corresponding methyl sulphide and methyl sulphoxide derivatives has been studied in male Sprague-Dawley rat hepatocytes and liver microsomes. Rat hepatocytes converted FM to furfuryl methyl sulphoxide (FMSO) and MTF to 2-methyl-3-(methylthio)furan sulphoxide (MMFSO). Liver microsomes catalysed the NADPH-dependent metabolism of furfuryl methyl sulphide (FMS) to FMSO and 2-methyl-3-(methylthio)furan sulphide (MMFS) to MMFSO. FMS and MMFS metabolism to their thiofuran methyl sulphoxide derivatives was induced by the treatment of rats with Aroclor 1254 and inhibited in liver microsomes treated with I-aminobenzotriazole. The NADPH-dependent metabolism of FM to FMSO and MTF to MMFSO in liver microsomes was observed in the presence of S-adenosylmethionine. In summary, both thiofurans can be metabolised in rat liver to their thiofuran methyl sulphide derivatives which can be subsequently S-oxidised to form thiofuran methyl sulphoxides. FM and MTF appear to be substrates for rat hepatic microsomal thiol methyltransferase and the S-oxidation of FMS and MMFS appears to be primarily catalysed by cytochrome P450 forms. (C) 2003 Elsevier Ltd. All rights reserved.
Dearomatization of aryl sulfoxides: a switch between mono- and dual-difluoroalkylation