Sodium Selenosulfate from Sodium Sulfite and Selenium Powder: An Odorless Selenylating Reagent for Alkyl Halides to Produce Dialkyl Diselenide Catalysts
using aqueous EtOH as the solvent and avoiding the generation of a malodourous selenol intermediate, the selenylation reaction with Na2SeSO3 is much more environmentally friendly than conventional methods. Owing to the cheap and abundant starting materials and selenium reagents, our novel synthetic method reduces the production costs of dialkyl diselenides as organoselenium catalysts, thereby advancing
Na2SeSO3 可以通过 Na2SO3 与 Se 能量的反应原位生成,被发现是一种无味试剂,用于烷基卤化物的硒基化生成二烷基二硒化物。这些产品最近已被证明是羰基化合物的 Baeyer-Villiger 氧化、烯烃的选择性氧化或肟的氧化脱肟的良好催化剂。通过使用乙醇水溶液作为溶剂并避免产生恶臭的硒醇中间体,与传统方法相比,与 Na2SeSO3 的硒基化反应更加环保。由于起始原料和硒试剂廉价且丰富,我们的新合成方法降低了作为有机硒催化剂的二烷基二硒化物的生产成本,
A NOVEL CLEAVAGE WITH NITRIC ACID OF POLYMETHYLATED DIBENZYL SELENIDES AND SELENOXIDES
作者:Hitomi Suzuki、Kazumasa Ohnishi
DOI:10.1246/cl.1981.111
日期:1981.1.5
When treated with nitric acid at low temperature, the title selenides and selenoxides undergo a novel cleavage reaction to give the corresponding benzyl nitrates and elemental selenium.
Selenophilicity of Copper in Selenium-Carbon Bond Formation from Selenous Acid Using Cu(II)/Sn(II) Reagent
作者:Joyanta Choudhury、Pradipta Sinha、S. Prabhakar、M. Vairamani、Sujit Roy
DOI:10.1080/10426500802040349
日期:2008.11.7
A selenium transfer reaction from selenousacid to benzyl and alkyl halides is initiated in the presence of stannous chloride and a catalytic amount of cupric chloride resulting in the formation of the corresponding diorganoselenides and/or diorganodiselenides as the major products as indicated by 1 H, 13 C, 77 Se NMR, and MS. The reaction is characterized by a dual-metal effect at the selenium activation
在氯化亚锡和催化量的氯化铜存在下引发从亚硒酸到苄基和烷基卤化物的硒转移反应,导致形成相应的二有机硒化物和/或二有机二硒化物作为主要产物,如 1 H、13 所示C、77 Se NMR 和 MS。该反应的特征在于硒活化和转移步骤中的双金属效应。因此,氯化亚锡、氯化铜和亚硒酸的初始反应产生α-Cu 2 Se。在氯化亚锡的额外帮助下,硒从后者转移到有机卤化物。
A cost-effective shortcut to prepare organoselenium catalysts via decarboxylative coupling of phenylacetic acid with elemental selenium
acid with elemental selenium was discovered and employed for the preparation efficient organoselenium catalysts for Baeyer–Villiger reaction and oxidative deoximation reaction. Compared with the traditionally used Grignard reagent method, the decarboxylative coupling reaction with selenium powders provides a shortcut for the preparation of organoselenium catalysts free of carcinogenic organohalide starting
Aluminum-catalyzed direct conversion of lactones to selenolactones in the presence of elemental selenium and its application in the indium-catalyzed syntheses of dibenzyl selenides from benzyl acetates
Se rather than elemental S. Additionally, an In(OAc)/PhSiH (OAc = acetate) reducing system effectively catalyzed the direct conversion of linear benzyl acetates, which constitute substructures of lactones, and elemental Se to dibenzyl selenide derivatives.
含硒化合物具有新颖的化学性质和独特的药理作用。尽管已经报道了多种制备硒酯的方法,但对相关环状硒酯的合成关注仍然不足。合成硒内酯的常规方法通常涉及多步过程。在本研究中,AlBr/PhSiH(Ph = 苯基)还原体系选择性催化 γ-芳基-γ-内酯和元素 Se 向 γ-芳基-γ-硒内酯的一锅转化,收率良好。该还原系统强烈激活元素 Se 而不是元素 S。此外,In(OAc)/PhSiH (OAc = 乙酸酯) 还原系统有效催化直链乙酸苄酯(构成内酯的子结构)和元素 Se 直接转化为二苄基硒化物衍生物。