Synthesis and Biological Activities of Aryl Propargyl Sulfone
摘要:
AbstractA series of molecules containing monopropargyl sulfone or 1, 2‐bis‐propargyl sulfone were synthesized. The cytotoxicity of these compounds against human carcinoma cells was also examined. This study indicated that the formation of a biradical intermediate is important to the potency of cytotoxicity.
Selective Suzuki-Miyaura Monocouplings with Symmetrical Dibromoarenes and Aryl Ditriflates for the One-Pot Synthesis of Unsymmetrical Triaryls
作者:Corinne Minard、Carole Palacio、Kevin Cariou、Robert H. Dodd
DOI:10.1002/ejoc.201400090
日期:2014.5
parameters that would permit selectiveSuzuki–Miyauramonocouplings of symmetrical dihaloarenes were studied. High selectivity and efficiency can be obtained for a broad range of substrates by using operationally simple conditions and widely available reagents. The 38 different examples described provide a valuable toolbox for the rapid access to unsymmetricaltriaryls, as illustrated by the preparation
A regioselective double Stille coupling reaction was explored using bicyclic stannolanes that were easily prepared from the radical cascade reaction of β-amino-α-methylene esters. Various 1-bromo-2-iodoarenes underwent the double coupling reaction to afford benzoisoindole derivatives in a regioselective manner, where the carbon attached to the iodine selectively coupled with the vinylic carbon, and
使用容易从β-氨基-α-亚甲基酯的自由基级联反应制备的双环锡烷来研究区域选择性双Stille偶联反应。各种1-溴-2-碘代芳烃进行双偶联反应,以区域选择性方式得到苯并异吲哚衍生物,其中连接至碘的碳与乙烯基碳选择性地偶联,然后连接至溴的碳与烷基碳选择性地偶联。分子内和分子间偶联反应的结合提供了六氢茚并[1,2- b]吡咯衍生物,收率高。在过量的CsF存在下,产率进一步提高。试图鉴定反应中间体,其中用盐酸和HBr水溶液分解锡烷基锡烷,得到三联双锥体(TBP)五配位锡配合物,如通过微观分析和119 Sn NMR证实的。使用DC1进行分解选择性地将氘引入到异亚甲基单元的E-位。在钯催化剂和DABCO的存在下,该配合物顺利进行分子内Stille偶联反应,得到六氢茚并[1,2- b]吡咯,收率高。这些结果表明,双偶联反应通过TBP锡配合物进行,从而促进了芳基卤化物与Csp 3-锡键之间的第二次分子内偶联反应。
SuFEx-enabled, chemoselective synthesis of triflates, triflamides and triflimidates
作者:Bing-Yu Li、Lauren Voets、Ruben Van Lommel、Fien Hoppenbrouwers、Mercedes Alonso、Steven H. L. Verhelst、Wim M. De Borggraeve、Joachim Demaerel
DOI:10.1039/d1sc06267k
日期:——
Sulfur(VI) Fluoride Exchange (SuFEx) chemistry has emerged as a next-generation click reaction, designed to assemble functional molecules quickly and modularly. Here, we report the ex situ generation of trifluoromethanesulfonyl fluoride (CF3SO2F) gas in a two chamber system, and its use as a new SuFEx handle to efficiently synthesize triflates and triflamides. This broadly tolerated protocol lends
硫 ( VI ) 氟化物交换 (SuFEx) 化学已成为下一代点击反应,旨在快速、模块化地组装功能分子。在这里,我们报告了在两室系统中异位生成三氟甲磺酰氟(CF 3 SO 2 F)气体,并将其用作新的SuFEx手柄来有效合成三氟甲磺酸酯和三氟甲酰胺。这种广泛耐受的方案适用于肽修饰或伸缩到偶联反应中。此外,重新设计带有 S 的 S VI –F 连接器 奥 → 南 NR 取代提供了类似的三氟甲酰亚胺氟化物作为 SuFEx 亲电子试剂,其参与了罕见报道的三氟甲亚胺酯的合成。值得注意的是,实验表明 H 2 O 是实现苯酚与胺基化学选择性三氟甲磺化的关键,这一现象可以通过从头算动力学模拟通过胺的 CF 3 SO 2 F 三氟甲磺酸基化的氢键分子过渡态得到最好的解释。
Diyne-containing (co) polymer, processes for producing the same, and cured film
申请人:JSR Corporation
公开号:EP1099719A1
公开(公告)日:2001-05-16
A diyne-containing (co)polymer which is soluble in organic solvents, has excellent processability, and gives a cured coating film excellent in heat resistance, solvent resistance, low-dielectric characteristics, and mechanical strength; processes for producing the same; and a cured film.
The diyne-containing (co)polymer contains at least 10 mol% repeating units represented by the following formula (1) and has a weight-average molecular weight of from 500 to 1,000,000:
wherein Y represents a specific bivalent organic group; Ar represents a bivalent organic group; and n represents 0 or 1.