• 제목/요약/키워드: One-pot Synthesis

검색결과 223건 처리시간 0.023초

5,7-Diaryl-3,4,6-trihydronaphthalen-2-ones의 One-pot 합성 (One-pot Synthesis of 5,7-Diaryl-3,4,6-trihydronaphthalen-2-ones)

  • Gopalakrishnan, M.;Manikandan, H.;Sureshkumar, P.;Thanusu, J.;Kanagarajan, V.
    • 대한화학회지
    • /
    • 제51권4호
    • /
    • pp.356-360
    • /
    • 2007
  • sodium ethoxide의 존재하에서 3,5-diaryl-cyclohex-2-en-1-one와 methyl vinyl ketone로부터 5,7-Diaryl- 3,4,6-trihydronaphthalen-2-ones가 합성되었다. 이 생성물은 IR, UV-Visible, 1H-NMR, 13C-NMR 그리고 mass spectral techniques로 구조를 규명하였다. 1H과 13C signals의 피크들은 HSQC spectrum을 찍어 정확히 규명하였다.

New and General Methods for the Synthesis of Arylmethylene Bis(3-Hydroxy-2-Cyclohexene-1-Ones) and Xanthenediones by EDDA and In(OTf)3-Catalyzed One-Pot Domino Knoevenagel/Michael or Koevenagel/Michael/Cyclodehydration Reactions

  • Jung, Doo-Hwan;Lee, Yong-Rok;Kim, Sung-Hong;Lyoo, Won-Seok
    • Bulletin of the Korean Chemical Society
    • /
    • 제30권9호
    • /
    • pp.1989-1995
    • /
    • 2009
  • Efficient one-pot synthesis of arylmethylene bis(3-hydroxy-2-cyclohexene-1-ones) and xanthenediones by EDDA and In($OTf)_3$-catalyzed reactions was developed starting from dimedone and aryl aldehydes. The key strategies of these reactions involve domino Knoevenagel/Michael reaction or Koevenagel/Michael/Cyclodehydration reactions. The scope and limitation of the two catalysts under various reaction conditions were investigated and described.

Li, Zr 담지 메조포러스 실리카 합성 : One pot 합성 및 저온 이산화탄소 흡착 응용 (Li, Zr doped mesoporous silica: One pot synthesis and its application to $CO_2$ adsorption at low temperature)

  • 마니 기니쉬;말간단 바기아락스미;팽 메이메이;푸시파라지 헤마라다;장현태
    • 한국산학기술학회:학술대회논문집
    • /
    • 한국산학기술학회 2010년도 추계학술발표논문집 1부
    • /
    • pp.313-317
    • /
    • 2010
  • Li, Zr doped mesoporous silica was synthesized in one pot and investigated for low temperature $CO_2$ adsorption. Herein CTAB and TEOS are used as structural directing agent and silica source respectively. The characteristics of the material was obtained from FT IR, XRD, SEM, TG and BET results. ICP AES results revealed the presence of lithium and zirconium. The material possesses high surface area ($962.22m^2g^{-1}$) with mono dispersed particles of about 2 nm. The maximum $CO_2$ adsorption capacity is 5 wt % (50 mg/g) of $CO_2$/g of sorbent at $25^{\circ}C$, which is regenerable at $200^{\circ}C$. This regeneration temperature of the adsorbent is lower than the reported lithium zirconium silicate powder. Until now, there is no report for the synthesis of Li, Zr doped mesoporous silica. The performance studies illustrate that Li, Zr doped mesoporous silica is tunable, regenerable, recyclable and selective sorbent and hence found to be a promising candidate for $CO_2$ adsorption.

  • PDF

One-Pot Synthesis, Crystal Structures and Thermal Properties of Two Three-Dimensional Cobalt(II) Complexes

  • Tao, Bo;Lei, Wen;Cheng, Feiran;Xia, Hua
    • Bulletin of the Korean Chemical Society
    • /
    • 제33권6호
    • /
    • pp.1929-1933
    • /
    • 2012
  • Two cobalt(II) compounds $[Co(2,2{^\prime}-bipy)(H_2O)_2(SO_4)]_n$ (1) and $[Co_2(2,2^{\prime}-bipy)_2(btec)(H_2O)_6]{\cdot}2H_2O$ (2) (2,2'-bipy = 2,2'-bipyridine, $H_4btec$ = 1,2,4,5-benzenetetracarboxylic acid), have been simultaneously synthesized by a one-pot slow solvent evaporation reaction. Their structures were determined by single-crystal X-ray diffraction and further characterized by X-ray powder diffraction (XRPD), IR, elemental and thermogravimetric analysis (TGA). The structural analysis reveals that compound 1 exhibits an infinite 1D chain structure with the octahedral Co(II) centers bridging by the tetrahedral ${\mu}_2-SO{_4}^{2-}$ ligands, while compound 2 possesses a dinuclear $Co_2(2,2^{\prime}-bipy)_2(btec)(H_2O)_6$ unit and the two adjacent octahedral Co(II) ions are linked by the bismonodentately coordinated btec ligand. Additionally, compound 2 exhibits blue fluorescent emission in the solid state at room temperature.