在这项研究中,我们报告了一种在环境温度温和条件下新型高效的混合三硫代磷酸酯的一锅法合成方法,无需补充添加剂。该方法的多功能性源于其利用多种硫醇作为亲核反应物,1-氯-N , N , N ', N'-四异丙基膦二胺[双(二异丙氨基)氯膦]作为磷前体,以及各种磺基氯化物作为亲电子硫源。值得注意的是,我们的研究范围超出了混合三硫代磷酸酯,涵盖了硒代二硫代磷酸酯的合成,强调了该合成方案的广泛适用性。
Novel urea derivatives of the formula ##STR1## wherein R and R.sub.1 are individually selected from the group consisting of hydrogen, chlorine, bromine, nitro, trifluoromethyl, lower alkyl of 1 to 6 carbon atoms and lower alkoxy of 1 to 6 carbon atoms, n is 0 or 1, X is selected from the group consisting of lower alkyl of 1 to 6 carbon atoms optionally substituted with halogen and a nitrogen heterocyclic optionally containing 1 or more other heteroatoms, Y is selected from the group consisting of hydrogen, alkyl of 1 to 4 carbon atoms and S--Z wherein Z is a nitrogen heterocyclic optionally containing 1 or more other heteroatoms and the dotted lines indicate that the compound of formula I may contain no oxygen bound to the sulfur atom or may be in sulfoxide or sulfonyl form which are useful as herbicides and thereon preparation.
A Divergent Strategy for Site‐Selective Radical Disulfuration of Carboxylic Acids with Trisulfide‐1,1‐Dioxides
作者:Zijun Wu、Derek A. Pratt
DOI:10.1002/anie.202104595
日期:2021.7.5
direct conversion of carboxylic acids into disulfides is described. The approach employs oxidative photocatalysis for base-promoted decarboxylation of the substrate, which yields an alkyl radical that reacts with a trisulfide dioxide through homolytic substitution. The trisulfide dioxides are easily prepared by a newly described approach. 1°, 2°, and 3° carboxylic acids with varied substitution are good
Phenoxyphenoxypropionic acids and derivatives, and their use as
申请人:Velsicol Chemical Corporation
公开号:US04443248A1
公开(公告)日:1984-04-17
This invention discloses novel herbicidal compounds of the formula ##STR1## wherein X is selected from the group consisting of halogen, nitro, cyano and trifluoromethyl; Y is selected from the group consisting of hydrogen, halogen, nitro and cyano; R.sup.1 is alkyl; R.sup.2 is selected the group consisting of hydrogen and alkyl; and R.sup.3 is selected from the group consisting of hydroxy, alkoxy, alkylthio, amino, alkylamino and dialkylamino and further herbicidal compositions and methods using said compounds.
Synthesis of Unsymmetrical Trisulfides from S‐Substituted Sulphenylthiosulphates
作者:Shuaishuai Liang、Liye Ma、Zihao Guo、Fanmin Liu、Zijian Lin、Wenbin Yi
DOI:10.1002/anie.202404139
日期:2024.7.8
efficient approach for accessing unsymmetrical trisulfides through an I2-catalyzed three-componentcoupling of S-substituted sulphenylthiosulphates (RSSSO3Na), alkyl electrophiles and thiourea. This is the first report on utilizing RSSSO3Na as disulfurating reagent and provides a convenient method for converting bromides, chlorides, iodides and tosylates into trisulfides.
我们开发了一种通用且有效的方法,通过 I 2催化的S取代的磺基硫代硫酸盐 (RSSSO 3 Na)、烷基亲电子试剂和硫脲的三组分偶联来获取不对称三硫化物。这是第一篇利用RSSSO 3 Na作为二硫化试剂的报道,并提供了一种将溴化物、氯化物、碘化物和甲苯磺酸盐转化为三硫化物的便捷方法。
A traceless, one-pot preparation of unsymmetric disulfides from symmetric disulfides through a repeated process involving sulfenic acid and thiosulfinate intermediates
作者:Minsoo Han、Jong Tak Lee、Hoh-Gyu Hahn
DOI:10.1016/j.tetlet.2010.11.042
日期:2011.1
A variable group of unsymmetric disulfides was prepared under mild reaction conditions and in high yields through the reaction of symmetric disulfides with sulfuryl chloride followed by treatment with thiols in the presence of water. (C) 2010 Published by Elsevier Ltd.