• Title/Summary/Keyword: One-pot reaction

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One-pot Synthesis of Cinnamylamines with Various Protecting Groups from Cinnamyl Ethers

  • Jung, Young-Hoon;Kim, Ji-Duck
    • Archives of Pharmacal Research
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    • v.24 no.5
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    • pp.371-376
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    • 2001
  • The reaction of various alkyl cinnamyl ethers with CSI afforded the corresponding cinnamylamines with various protecting groups, such as -NHMoc, -NHiPoc, -NHCbz, -NHPnz, -NHTroc and -NHAloc. In the case of cinnamyl t-butyl ether and cinnamyl p-methoxybenzyl ether, the corresponding cinnamyl carbamates were formed via a different reaction pathway from the above.

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Total Synthesis of Norneolignans from Krameria Species

  • Seo , Pil-Ja;Choi, Hong-Dae;Son, Byeng-Wha
    • Archives of Pharmacal Research
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    • v.27 no.12
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    • pp.1189-1193
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    • 2004
  • The total synthesis of norneolignans isolated from Krameria species, 2-aryl-5-(E)-propenylbenzofurans (5, 11), is described. The key step involves the one-pot reaction for 2-arylbenzofurans (2, 7) from 4-hydroxyphenylacetone with 4'-acetoxy-2-chloro-2-(methylthio)acetophenone (1) and 2-chloro-2-methylthio-(2',4',6'-trimethoxy)acetophenone (6) under Friedel-Crafts reactionconditions.

Efficient Synthesis of β-Acetamido Ketones by Silver(I) Triflate-Catalyzed Multicomponent Reactions

  • Pandit, Rameshwar Prasad;Lee, Yong Rok
    • Bulletin of the Korean Chemical Society
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    • v.33 no.11
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    • pp.3559-3564
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    • 2012
  • An efficient one-pot synthesis of ${\beta}$-acetamido ketones was accomplished by AgOTf-catalyzed multicomponent reactions of substituted acetophenones with aromatic aldehydes and acid chloride in acetonitrile in high yields. The methods offer several significant advantages of easy handling, mild reaction conditions, and use of effective and non-toxic catalyst.

New Synthetic Method of Perfluoro-Silanes for the Stable Electrolyte of Lithium Ion Battery Application

  • Koh, Kyungkuk;Sohn, Honglae
    • Journal of Integrative Natural Science
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    • v.10 no.3
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    • pp.171-174
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    • 2017
  • Non-hydrolyzable fluorinated organosilicon compounds as an eletrolyte for the application of lithium-ion batteries (LIB) are synthesized. New synthetic method for the perfluorinated organosilicon compound containing spacer such as ethyl and propyl group with cyano moiety instead of ethylene glycol to prevent hydrolysis and to promote conductivity are developed in one pot reaction with moderately high yield. Air-sensitive boron trifluoride etherate is no longer required in this reaction. The products are characterized by spectroscopic analysis.

One Step Preparation of Spherical Silicon Resins from Immiscible Reaction Mixtures

  • Lee, Da-Yun;Kim, Young-A;Kim, Young-Baek;Kim, Jun-Kyu;Han, Yang-Kyoo
    • Macromolecular Research
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    • v.16 no.4
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    • pp.353-359
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    • 2008
  • Spheres of silicon resins with different compositions were prepared in one-step reaction from mixtures of water and water-insoluble precursors of polysiloxanes (PSO) and polysilsesquioxanes (PSQ) using different amines as catalysts. The presence of PSO and PSQ in the spheres was confirmed by their mechanical properties and FTIR spectroscopy. Spheres of pure PSO were obtained from only dimethoxymethylvinylsiloxane (DMMVS) and 3-mercaptopropylmethyldimethoxysilan (MPMDMS) when the reaction was induced with appropriate catalysts. DMMVS and MPMDMS always gave the most promising results regarding the formation of discrete solid spheres with the minimum tendency to form monolithic solids or fluid-like, premature products. The spheres were characterized by optical microscopy, scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy. The mixtures containing larger amounts of PSO precursors commonly gave lower yields and softer spheres.

Synthesis of Mannich Bases Using Substitued Aromatic Alcohols with Secondary Amines: Relative Reactivity and Regioselectivity Depending on Substrates (치환된 방향족 알코올과 이차아민을 사용한 Mannich염기의 합성:기질에 따른 상대적인 반응성과 위치선택성)

  • Chi, Ki Whan;Ahn, Yoon Soo;Park, Tae Ho;Ahn, Jeong Soo;Kim, Hyun Ah;Park, Joo Yeon
    • Journal of the Korean Chemical Society
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    • v.45 no.1
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    • pp.51-60
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    • 2001
  • One-pot Mannich reaction of substituted hydroxy aromatic compounds with secondary amines in an aprotic solvent has been studied. The results demonstrate that the relative reactivity and regioselectivity of the Mannich reaction depend on the steric hindrance of amines as well as the nucleophilicity of hydroxy aromatic rings.

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Synthesis of 2-n-Butyl-3-fluoropyrrole Derivatives

  • Kim, Bo-Mi;San, Quan-Ze;Bhatt, Lok Ranjan;Jung, Dong-Woon;Lee, Young-Hang;Chai, Kyu-Yun
    • Bulletin of the Korean Chemical Society
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    • v.30 no.6
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    • pp.1293-1296
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    • 2009
  • A new series of N-substituted 2-n-butyl-3-fluoropyrroles were prepared by a simple one-pot reaction designed of retrosynthesis. $\alpha,\alpha-Difluoro-\gamma-iodo-\gamma$-(trimethylsilyl)propyl n-butyl ketone, a component precursor molecule to 2-n-butyl-3-fluoropyrroles, was prepared with Cu(0) catalyst. It reacted with various primary amines to yield N-substituted 2-n-butyl-3-fluoropyrroles. The products were synthesized via a one-pot reaction scheme between $\alpha,\alpha-Difluoro-\gamma-iodo-\gamma$-(trimethylsilyl) propyl n-butyl ketone and primary amines in excess ( $\geq$ 5 molar equivalence), which eliminate the need of KF required in obtaining n-butyl-1H-3-fluoropyrrole. The yield of products depended reversely on spatial bulkness around N-binding carbon.

Preparation of superparamagnetic ZnFe2O4 submicrospheres via a solvothermal method

  • Ma, Jie;Chen, Bingjie;Chen, Bingkun;Zhang, Shuping
    • Advances in nano research
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    • v.5 no.2
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    • pp.171-178
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    • 2017
  • Superparamagnetic Zinc ferrite submicropheres are firstly synthesized via a one-pot solvothermal approach at $200-215^{\circ}C$ for 4-8 hours. $ZnCl_2$, $FeCl_3$ and NaAc are used as precursors with ethylene glycol solvent. The X-ray diffraction (XRD) data indicate that $ZnFe_2O_4$ nanoparticles with the grain size around $15{\pm}3nm$ can be successfully synthesized via the one-pot method. The scanning/transmission electronic microscope (SEM/TEM) images further show the samples are submicrospheres self-assembled by nanoparticles with size about 375-500 nm changed with reaction conditions. Room-temperature vibration magnetic strength measurements (VMS) demonstrates the as-obtained $ZnFe_2O_4$ submicrospheres show prefect superparamagnetism, whose coercivity force and remanence are practically nil. The reaction temperature and time influence on the crystallinity, diameter, saturated magnetic intensity and morphology of the particles.

One-pot Synthesis of Benzimidazoles and Benzothiazoles in the Presence of Fe(HSO4)3 as a New and Efficient Oxidant

  • Eshghi, Hossein;Rahimizadeh, Mohammad;Shiri, Ali;Sedaghat, Parisa
    • Bulletin of the Korean Chemical Society
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    • v.33 no.2
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    • pp.515-518
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    • 2012
  • A series of substituted benzimidazoles and benzothiazoles were prepared through the one-pot reaction of ophenylenediamine and o-aminothiophenol with various aldehydes in the presence of ferric hydrogensulfate both in EtOH and water as solvent. The reactions proceed smoothly in excellent yield, high chemoselectivity and with an easy work-up.

One-Pot Synthesis of CdSe Quantum Dots Using Selenium Dioxide as a Selenium Source in Aqueous Solution

  • Wang, Yilin;Yang, Hong;Xia, Zhenyi;Tong, Zhangfa;Zhou, Liya
    • Bulletin of the Korean Chemical Society
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    • v.32 no.7
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    • pp.2316-2318
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    • 2011
  • A novel technology has been developed for the synthesis of thioglycolic acid (TGA)-capped CdSe quantum dots (QDs) in aqueous medium. The reaction was carried out in air atmosphere with one-pot by using $SeO_2$ to replace Se or $Na_2Se$. The technological parameters including refluxing time, pH values and molar ratios of selenium to cadmium had significant influence on the luminescence properties of CdSe QDs. Furthermore, the obtained QDs were characterized by fluorescent spectroscopy, X-ray powder diffraction (XRD) and transmission electron microscopy (TEM), respectively. The results demonstrated that the CdSe QDs were of zinc-blended crystal structure in a sphere-like shape.