A transition-metal-free synthetic method has been developed for the synthesis of unsymmetrical diaryl chalcogenides (S, Se, and Te) from diaryl dichalcogenides and arenes under oxidative conditions by using potassium persulfate at room temperature. Variously substituted arenes such as anisole, thioanisole, diphenyl ether, phenol, naphthol, di- and trimethoxy benzenes, xylene, mesitylene, N,N-dimethylaniline
已开发出一种无过渡金属的合成方法,该方法用于在室温条件下通过使用过硫酸钾,在氧化条件下由二芳基二卤化锑和芳烃合成不对称的二芳基硫属元素化物(S,Se和Te)。各种取代的芳烃,例如苯甲醚,硫代苯甲醚,二苯醚,苯酚,萘酚,二和三甲氧基苯,二甲苯,均三甲苯,N,N-二甲基苯胺,溴取代的芳烃,萘和二芳基二卤化碳经历了碳硫族键形成反应在三氟乙酸中生成不对称的二芳基硫属元素化物。为了理解反应的机理部分,由77进行了详细的中间体原位表征通过使用二苯基二硒化物为底物进行Se NMR光谱分析。77 Se NMR研究表明,亲电子物质ArE +是由二芳基二卤化二硫化物与过硫酸盐在三氟乙酸中反应生成的。芳基硫属元素离子对芳烃的亲电攻击可能是芳基-硫属元素键形成的原因。
PREPARATION OF DISELENIDES BY THE OXIDATION OF SELENOLS USING TRICHLOROISOCYANURIC ACID
作者:Ping Zhong、Meng-Ping Guo
DOI:10.1081/scc-100104062
日期:2001.1
Selenols are readily oxidized to diselenides by a solution of pyridine, water, benzoic acid, and trichloroisocyanuric acid in acetonitrile and methylene chloride.
Synthesis of organoselenyl isoquinolinium imides <i>via</i> iron(<scp>iii</scp>) chloride-mediated tandem cyclization/selenation of <i>N</i>′-(2-alkynylbenzylidene)hydrazides and diselenides
作者:Hai-Feng Yao、Dian-Liang Wang、Fang-Hui Li、Bing Wu、Zhong-Jian Cai、Shun-Jun Ji
DOI:10.1039/d0ob01517b
日期:——
This report describes the synthesis of organoselenyl isoquinolinium imides through a tandemcyclization between N′-(2-alkynylbenzylidene)hydrazides and diselenides. The reaction was carried out at room temperature under an ambient atmosphere using cheap iron(III) chloride as the metallic source. The strategy shows good tolerance to a broad range of N′-(2-alkynylbenzylidene)hydrazides and diselenides
本报告描述了通过N '-(2-炔基亚苄基) 酰肼和二硒化物之间的串联环化合成有机硒基异喹啉酰亚胺。该反应在室温和环境气氛下使用廉价的氯化铁 ( III ) 作为金属源进行。该策略对广泛的N '-(2-炔基亚苄基) 酰肼和二硒化合物具有良好的耐受性,并在一步中形成 C-N 和 C-Se 键。所得产物通过银催化的[3+2]环加成反应很容易进一步转化为具有生物活性的H-吡唑并[5,1- a ]异喹啉骨架。
A Scalable Process for the Synthesis of 1,2-Dialkyldiselanes and 1-Alkaneselenols
作者:John P. Cooksey、Philip J. Kocieński、A. John Blacker
DOI:10.1021/acs.oprd.9b00380
日期:2019.11.15
telescoped process for the synthesis of 1-alkaneselenols entails (1) the rapid formation of potassium selenocyanate from potassium cyanide and selenium in methanol, (2) the nucleophilic substitution of bromoalkanes or alkyl tosylates with potassium selenocyanate, (3) the mild base-catalyzed conversion of the resultant 1-alkaneselenocyanates to 1,2-dialkyldiselanes (the Krief reaction), and (4) the reduction