在此,我们报告了一种合成硒化四环吲哚唑烯的有效方案。二有机基二硒化物与分子碘在二氯甲烷中的反应导致原位形成有机亚硒基碘。通过有机亚硒基碘和双吲哚在室温下在无金属条件下以良好的收率实现了通过分子内级联环化合成硒化四环吲哚唑啉。所有化合物均通过 FT-IR、HRMS 和1 H、13 C 和77 Se NMR 光谱数据进行了全面表征。
Stereoselective Synthesis of Vinyl Selenides by Coupling of Vinyl Bromides with Diorgano Diselenides Catalyzed by Copper(I) in [Bmim]BF<sub>4</sub>
作者:Weiliang Bao、Dezhi Chang
DOI:10.1055/s-2006-947320
日期:2006.7
The CuI/L-proline-catalyzed zinc-promoted coupling reaction of vinylbromides with diaryl diselenides or dialkyl diselenides readily occurred at 110 °C in [Bmim]BF 4 to give the corresponding vinyl selenides in good to excellent yields. The recyclable catalyst system offered a convenient, stereoselective and versatile method for the synthesis of vinyl selenides.
friendly, and efficient electrochemical selenylation/cyclization of alkenes has been developed with moderate to excellent yields. This selenylated transformation proceeds smoothly and tolerates a wide range of synthetically useful groups to deliver diverse functionalized benzheterocycles, including iminoisobenzofuran, lactones, oxindoles, and quinolinones. Moreover, the present syntheticroute could also
Organometallic Reaction in Aqueous Media. Synthesis of α-Selenoesters By Reactions of α-Bromoesters With Diselenides Promoted By Metallic Tin
作者:Weixing Qian、Weiliang Bao、Yongmin Zhang
DOI:10.1055/s-1997-805
日期:1997.4
In aqueous conditions α-bromoesters can react with diselenides by metallic tin to give α-selenoesters in moderate to good yields.
在水相条件下,α-溴酯可以通过金属锡与双硒化合物反应,以中等至良好的产率得到α-硒酯。
Highly atom-economical, catalyst-free, and solvent-free phosphorylation of chalcogenides
作者:Rakhee Choudhary、Pratibha Singh、Rekha Bai、Mahesh C. Sharma、Satpal Singh Badsara
DOI:10.1039/c9ob01921a
日期:——
Silica gel promoted, catalyst-free and solvent-free S–P, Se–P and Te–P bond formations to obtain phosphinothioates, phosphoroselenoates, and phosphorotelluroates respectively in good to excellent yields are described.
Iron-Promoted Tandem Cyclization of 1,3-Diynyl Chalcogen Derivatives with Diorganyl Dichalcogenides for the Synthesis of Benzo[<i>b</i>]furan-Fused Selenophenes
作者:José S. S. Neto、Bernardo A. Iglesias、Davi F. Back、Gilson Zeni
DOI:10.1002/adsc.201600759
日期:2016.11.17
selenium, sulfur and oxygen nucleophiles we observed that the nucleophilicity and steric effects of the competing functional groups were determinant factors for the selectivity of the cyclization. The benzo[b]chalcogenopheno[2,3‐d]furans had absorptions in the UV region (300–350 nm range) with molar absorptivity coefficient values ascribed to spin and symmetry allowed π–π* electronic transitions. An emission
丁基[2-(phenylbuta-1,3-二炔基)苯基]硫属元素的双分子5-内-dig环化已用于选择性制备苯并[ b ]硫属元素毒素[2,3- d]呋喃。研究了几个反应参数以确定最佳反应条件,我们观察到丁基[2-(苯基丁亚-1,3-二炔基)苯基]硫族元素(0.25 mmol)与六水合氯化铁(III)(2.0当量)的反应二氯甲烷回流中的二有机基二硒化物(1.75当量)最适合以35-89%的收率得到产品。这些标准反应条件与底物中的许多官能团相容,例如甲基,氯,氟,甲氧基和杂芳基。该方案对于二有机基二硒化物也有效,但对二有机基二硫化物和二碲化物无效。在硒的竞争中 硫和氧亲核试剂,我们观察到竞争性官能团的亲核活性和空间效应是环化选择性的决定性因素。苯并[b ]硫代苯并呋喃[2,3- d ]呋喃在紫外区(300-350 nm范围)具有吸收,摩尔吸收系数值归因于自旋,对称性允许π-π*电子跃迁。紫色区域(380–440