62961-62-0Relevant academic research and scientific papers
Diverse One-Pot Electrophilic Trapping Reactions of 2-Quinolyl zincates with Acyl Chlorides and Allyl Iodide
Chae, Suyeon,Jeong, Hye Jin,Jeong, Keunhong,Namgoong, Sung Keon
, p. 378 - 392 (2020)
The tandem acylation reactions of 2-quinolylzincates under one-pot reaction conditions facilitated the formation of biologically active (Z)-3-alkylidenephthalides and multifunctionalized quinoline derivatives at specific positions. The reactions of these
Gold(I)-catalyzed hydroaminative cyclization leading to 2,5-dihydroisoxazole
Yeom, Hyun-Suk,Lee, Eun-Sun,Shin, Seunghoon
, p. 2292 - 2294 (2007)
Gold(I)-catalyzed intramolecular hydroamination of O-propargyl-N-Boc- hydroxylamine is reported. The present method provides a novel, catalytic, and mild approach to 2,5-dihydroisoxazole derivatives. In addition, a mechanism of N-O cleavage as a side reaction as well as desired cyclization is proposed. Georg Thieme Verlag Stuttgart.
Synthesis of Perinaphthenones via BF3.Et2O Mediated One-Pot Cascade 4,5-Annulation Reactions of 1-Naphthols and Ynones
Kuo, Chun-Wei,Rao, Naidu Sambasiva,Patil, Prakash Bhimrao,Chiang, Ting-Ta,Kavala, Veerababurao,Yao, Ching-Fa
, p. 1935 - 1943 (2021)
C4-C5 periannulation of 1-naphthols and ynones via BF3.Et2O mediated one-pot cascade under metal and solvent-free conditions have been developed for the synthesis of perinaphthenones. Furthermore, thi
Chemo-, regio- and stereospecific addition of amino acids to acylacetylenes: a facile synthesis of new N-acylvinyl derivatives of amino acids
Glotova, Tatyana E.,Dvorko, Marina Yu.,Ushakov, Igor A.,Chipanina, Nina N.,Kazheva, Olga N.,Chekhlov, Anatolii N.,Dyachenko, Oleg A.,Gusarova, Nina K.,Trofimov, Boris A.
, p. 9814 - 9818 (2009)
The one-pot reaction of natural amino acids (glycine, β-alanine, γ-aminobutyric and ε-aminocapronic acids, d,l-valine, d,l-leucine, anthranilic acid) with bielectrophilic acylacetylenes proceeds chemo-, regio- and stereospecifically in the presence of NaO
Metal complex and electroluminescent device comprising same
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Paragraph 0132-0135; 0146-0149, (2020/05/01)
Disclosed are a metal complex and an electroluminescent device comprising the same, wherein the metal complex contains a novel structure composed of a metal and a ligand. According to the invention, when the metal complex is applied to an electroluminescent device, especially in a hole injection layer, a hole transport layer and the like, the luminescent performance of the device can be improved,and the service life of the device can be effectively prolonged.
Synthesis of α,β-alkynyl ketones via the nickel catalysed carbonylative Sonogashira reaction using oxalic acid as a sustainable C1 source
Shaifali,Ram, Shankar,Thakur, Vandna,Das, Pralay
, p. 7036 - 7041 (2019/08/01)
An efficient and economic nickel-dppb catalyzed, carbonylative Sonogashira cross-coupling reaction was demonstrated to provide rapid access to various α,β-alkynyl ketones from aryl iodides and terminal alkynes using oxalic acid as the ex situ C1 source in a double vial (DV) system. Notably, the role of the ligand in combination with the Ni catalyst for the selective formation of carbonylative Sonogashira products was investigated and supported with control experiments. Yet, no reports are available for carbonylative Sonogashira coupling by using a CO-surrogate under Ni-catalyzed conditions. In this process, for the first time, oxalic acid is used as an ex situ solid, bench stable, easy to handle and efficient CO surrogate in a DV-system for the carbonylative Sonogashira coupling reaction with vast substrate scope.
Tf2O-Mediated Intermolecular Coupling of Secondary Amides with Enamines or Ketones: A Versatile and Direct Access to β-Enaminones
Liu, Yong-Peng,Zhu, Cheng-Jie,Yu, Cun-Cun,Wang, Ai-E,Huang, Pei-Qiang
, p. 7169 - 7174 (2019/11/16)
Based on the Tf2O-mediated intermolecular reaction of secondary amides with enamines derived from ketones, a novel approach to β-enaminones has been developed. The reaction is widely functional group tolerant and highly chemoselective. In the presence of 4 ? molecular sieves, the method can be extended to the one-pot condensation of secondary amides with ketones for NH β-enaminones synthesis.
Enolization rates control mono-: Versus di-fluorination of 1,3-dicarbonyl derivatives
Rozatian, Neshat,Beeby, Andrew,Ashworth, Ian W.,Sandford, Graham,Hodgson, David R.W.
, p. 10318 - 10330 (2019/11/20)
Fluorine-containing 1,3-dicarbonyl derivatives are essential building blocks for drug discovery and manufacture. To understand the factors that determine selectivity between mono- and di-fluorination of 1,3-dicarbonyl systems, we have performed kinetic studies of keto-enol tautomerism and fluorination processes. Photoketonization of 1,3-diaryl-1,3-dicarbonyl derivatives and their 2-fluoro analogues is coupled with relaxation kinetics to determine enolization rates. Reaction additives such as water accelerate enolization processes, especially of 2-fluoro-1,3-dicarbonyl systems. Kinetic studies of enol fluorination with Selectfluor and NFSI reveal the quantitative effects of 2-fluorination upon enol nucleophilicity towards reagents of markedly different electrophilicity. Our findings have important implications for the synthesis of α,α-difluoroketonic compounds, providing valuable quantitative information to aid in the design of fluorination and difluorination reactions.
Facile access to 1,3-diketones by gold(i)-catalyzed regioselective hydration of ynones
Kuang, Jinqiang,Zhou, Tao,You, Tingjie,Chen, Jianhui,Su, Chenliang,Xia, Yuanzhi
supporting information, p. 3940 - 3944 (2019/04/30)
A facile and efficient synthesis of 1,3-diketones was developed by the gold(i)-catalyzed regioselective hydration of ynones at room temperature. This methodology employed 2.5 mol% of PPh3AuCl and 3 mol% of AgOTf as a simple catalytic system wit
Copper-Catalyzed Modular Amino Oxygenation of Alkenes: Access to Diverse 1,2-Amino Oxygen-Containing Skeletons
Hemric, Brett N.,Chen, Andy W.,Wang, Qiu
supporting information, p. 1468 - 1488 (2019/01/25)
Copper-catalyzed alkene amino oxygenation reactions using O-acylhydroxylamines have been achieved for a rapid and modular access to diverse 1,2-amino oxygen-containing molecules. This transformation is applicable to the use of alcohols, carbonyls, oximes, and thio-carboxylic acids as nucleophiles on both terminal and internal alkenes. Mild reaction conditions tolerate a wide range of functional groups, including ether, ester, amide, carbamate, and halide. The reaction protocol allows for starting with free amines as the precursor of O-benzoylhydroxylamines to eliminate their isolation and purification, contributing to broader synthetic utilities. Mechanistic investigations reveal the amino oxygenation reactions may involve distinct pathways, depending on different oxygen nucleophiles.
