Luminescent assays for ketones and aldehydes employing catalytic signal amplification
作者:Ronald J. T. Houk、Eric V. Anslyn
DOI:10.1039/b616765a
日期:——
Herein we report the first use of transition metal catalytic signal enhancement for the analysis of small organic analytes. Two assays using Sonogashira and Suzuki cross-couplings have been used in the detection of ketones and aldehydes produce highly luminescent markers. The latter analysis utilizing the Suzuki coupling demonstrates the first use of peroxyoxalate initiated chemiluminescence in a sensing application. Chemiluminescent measurement revealed much higher sensitivity than fluorescence.
In(III)-Catalyzed Direct Regioselective Syntheses of 1-Naphthaldehyde Derivatives <i>via</i> a Hidden Aldehyde 1,3-Translocation and Disjointed CO<sub>2</sub> Extrusion
作者:Sabera Sultana、Gisela A. González-Montiel、Samjhana Pradhan、Hari Datta Khanal、Sagar D. Nale、Paul Ha-Yeon Cheong、Yong Rok Lee
DOI:10.1021/acscatal.1c00629
日期:2021.6.4
A highly regioselective annulation of 3-formylchromones with alkynes in the presence of indium triflate leads to the direct construction of diverse 1-naphthaldehyde derivatives. This one-pot de novo protocol features an unusual aldehyde 1,3-translocation and disjointed CO2 extrusion. This methodology is effective for the construction of structurally diverse 1-naphthaldehydes bearing chiral moieties
在三氟甲磺酸铟存在下,3-甲酰基色酮与炔烃的高度区域选择性环化可直接构建多种 1-萘醛衍生物。这种一锅从头协议具有不寻常的醛 1,3-易位和脱节的 CO 2挤出。该方法可有效构建具有手性部分和多芳烃的结构多样的 1-萘醛。这些萘醛可以进一步轻松地加工成各种官能团。密度泛函理论计算表明,这种 In(III) 催化的反应似乎是通过逐步脱芳环化、内酯化、环收缩以及最后排出 CO 2 进行的. 最有趣的是,醛易位不是通过醛的转座而是通过底物芳烃的骨架重排发生。
Synthesis of
<scp>
<i>N</i>
‐Heterocyclic
</scp>
Carbine Silver(I) and Palladium(
<scp>II</scp>
) Complexes with Acylated Piperazine Linker and Catalytic Activity in Three Types of C—C Coupling Reactions
salts LH2·Cl2 and LH2·(PF6)2 with acylated piperazine linker and two N‐heterocycliccarbene (NHC) silver(I) and palladium(II) complexes [L2Ag2](PF6)2 (1) and [L2Pd2Cl4] (2) were prepared. The crystal structures of LH2·Cl2 and 1 were confirmed by X‐ray analysis. In 1, one 26‐membered macrometallocycle was generated through two silver(I) ions and two bidentate ligands L. The catalytic activity of 2 was
Use of the Pd-PromotedExtended One-Pot (EOP) Synthetic Protocol for the Modular Construction of Poly-(arylene ethynylene)co-Polymers [?Ar?C?C?Ar??C?C?]n, Opto- and Electro-Responsive Materials for Advanced Technology
Pd-catalyzed coupling of organostannanes and aromatic halides (Stille reaction), the EOP synthetic route optimizes and reduces the use of tin, because during the multi-step one-pot process, tin intermediates are in situ formed by complete reconversion of tin by-products generated in the course of the transformation. In addition, after formation and isolation of polymeric materials, tin-containing products are
我们报告了我们的新型多步/一锅/钯促进合成策略(称为扩展一锅(EOP))在制备聚合物共轭体系中的应用,该体系的特征是骨架由规则交替的炔烃和亚芳基部分组成[ C C A C C B ] n。“ A ”单元(或模块)负责给聚合物留下深刻的机械强度,化学稳定性和可加工性,而选择了不同的“ B ”单元(或模块)以获得具有不同功能特性的聚合物。借助这种“模块化方法”的概念,一系列合作-聚(亚芳基亚乙炔基)的通式[氩Ç Ç中,Ar' Ç Ç ] Ñ [Ar为2,5-双(辛氧基)苯; 已经形成了潜在地用于制造感官,电活性和发光材料的Ar'= 1,10-菲咯啉,氢醌,吡啶,四氟苯,二噻吩,苯和蒽。对这些材料在溶液和固态下的光物理性质的研究表明,取决于Ar'的性质和聚合物主链中共轭作用的扩展,性质会有很大程度的变化。这个EOP合成方案具有多个和顺序的一锅式Pd催化工艺,其特点是催化剂装料量极低,反应时间始终
Palladium-Catalyzed Multialkynyl Cross-Coupling Reactions with Tetraalkynylindates
作者:Dongjin Kang、Dahan Eom、Hyunseok Kim、Phil Ho Lee
DOI:10.1002/ejoc.201000027
日期:2010.4
Pd-catalyzed multialkynylcross-couplingreaction performed with tetraalkynylindates generated in situ from the reaction of 1 equiv. of indium trichloride with 4 equiv. of organometallic reagents has been developed to produce symmetric as well as unsymmetric multialkynyl-substituted aromatic compounds in good-to-excellent yields. In these reactions, the four acetylide groups in the tetraalkynylindates transferred