• 제목/요약/키워드: Pendant group

검색결과 44건 처리시간 0.031초

모노아자크라운에테르 기능기를 가진 생리활성 포스피네이트 유도체의 합성 (Syntheses of Biologically Active Phosphinate Derivatives with a Pendant Monoazacrown Ether)

  • 남종우;정영진;양일우
    • 대한화학회지
    • /
    • 제37권1호
    • /
    • pp.154-161
    • /
    • 1993
  • 모노아자크라운에테르 기능기를 분자내에 갖는 4종의 새로운 포스피네이트 유도체들을 합성하고 그들의 생리활성을 조사하였다. 생리활성 포스피네이트 유도체들의 합성은 페닐포스피네이트를 알데이드 및 모노아자크라운에테르와 한 단계로 반응시켜 61~72%의 비교적 높은 수율로 이루어질 수 있었다. 합성된 화합물들의 생리활성은 수컷의 생쥐에 대한 복강주사로 검사하였으며, $LD_{50}$ 값이 65~90mg/kg으로서 크라운에테르 기능기가 부착되면 단순한 페닐포스피네이트에서 보다 독성이 현저히 증가됨을 나타내었다. 모노아자-15-크라운-5를 부착한 화합물과 모노아자-18-크라운-6을 부착한 화합물의 고리 크기에 의한 독성차는 현저하지 않았으나, 에스테르기의 종류에는 다소 영향을 받아 올틸 또는 프로필 포스피네이트 유도체들이 에틸 포스피네이트 유도체에 비해 독성이 높게 나타났다.

  • PDF

Synthesis and Characterization of New Polyaza Macrocyclic Nickel(Ⅱ) and Copper(Ⅱ) Complexes Two Nitrile or Imidate Ester Pendant Arms: Metal-Mediated Hydrolysis and Alcoholysis of the Nitrile Groups

  • Kang, Shin-Geol;Song, Jeong-Hoon;Jeong, Jong-Hwa
    • Bulletin of the Korean Chemical Society
    • /
    • 제23권6호
    • /
    • pp.824-829
    • /
    • 2002
  • New di-N-cyanomethylated tetraaza macrocycle 2.13-bis(cyanomethyl)-5.16-dimethyl-2,6,13,17-tetraazatricyclo[$16.4.0.0^7.12$]docosane $(L^2)$ has been prepared by the reaction of 3, 14-dimethyl-2,6,13,17-tetraazatricyclo $(L^1)$ with bromoacetonitrile. The square-planar complexes $[ML^2](ClO_4)_2(M=Ni(II)$ or Cu(II) can be prepared by the reaction of $L^2$ with the corresponding metal ion in acetonitrile. The cyanomethyl groups of $[ML^2](ClO_4)_2readily$ react with water to $yield[ML^3](ClO_4)_2$ containing pendant amide groups. The trans-octahedral complexes $[ML^4](ClO_4)_2$, in which two imidate ester groups are coordinated to the metal ion, can be also prepared by the reaction of $[ML^2](ClO_4)_2with$ methanol under mild conditions. The hydrolysis and alcoholysis reactions of $[ML^2](ClO_4)_2are$ promoted by the central metal ion, in spite of the fact that the cyanomethyl group is not involved in intramolecular coordination. The reactions are also promoted by a base such as triethylamine but are retarded by an $acid(HClO_4).Interestingly$, the imidate ester groups of $[ML^4]^2$ are unusually resistant to hydrolysis even in 0.1 M $HCIO_4$ or 0.1 M NaOH aqueous solution. Crystal structure of $[NiL^4](ClO_4)_2shows$ that the Ni-N (pendant imidate ester group) bond is rlatively strong; the Ni-N bond distance is shorter then the Ni-N(tertiary) distance and is similar to the Ni-N (secondary) distance.

Synthesis and Characterization of Poly(p-phenylenevinylene) Derivatives Containing Alkylphenylsilyl Pendant Group

  • Joo, Mun-Kyu;Jin, Sung-Ho;Lee, Kwang-Hee;Gal, Yeong-Soon
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2003년도 International Meeting on Information Display
    • /
    • pp.970-973
    • /
    • 2003
  • A new class of soluble PPV derivatives containing dimethyldodecylsilylphenyl unit as a pendant was synthesized by Gilch polymerization method. The resulting electroluminescent (EL) polymers showed good solubility, good film-forming ability onto the ITO substrate, and exhibited an amorphous morphology due to dimethyldodecylsilylphenyl branched group linked to the polymer backbone. The weight average molecular weights and polydispersities of the present EL polymers were in the range of 8.0-80.0 x $10^{4}$ and 2.67-7.80, respectively. The resulting EL polymers revealed a high thermal stability of up to $355-410^{\circ}C$. Their glass transition temperatures were in the range of $104-251^{\circ}C$. The emission colors could be tuned from green to orange-red colors by changing the MEH-PPV contents in copolymer systems. The turn-on voltages of the EL polymers were in the range of 1.8-4.0 V.

  • PDF

Synthesis and Characterization of Poly(fluorenylenevinylene-terphenylenevinylene) Containing Phenyl Pendant Group

  • Kim Yun-Hi;Jung Sung-Ouk;Lee Kwang-Hoi;Kwon Soon-Ki
    • Macromolecular Research
    • /
    • 제14권1호
    • /
    • pp.81-86
    • /
    • 2006
  • Poly(fluorenylenevinylene-terphenylenevinylene) containing phenyl pendant group was synthesized by Suzuki coupling reaction and characterized by ${1}^H$-NMR, ${13}^C$-NMR, and IR-spectrum. The weight average molecular weight ($M_{w}$) of the obtained polymer was 31,000 with a polydispersity index of 1.9. The polymer showed good solubility in common organic solvents, and the solution and film emitted blue emission ($\lambda_{max}$=460 nm) on irradiation with UV light. The ITO/PEDOT/polymer/Al device fabricated using the polymer as an emitting layer emitted blue light with a maximum peak around 460 nm. The maximum efficiency of the device was 0.011$\%$.

Synthesis and Characterization of New Tetraaza Macrocycles Bearing Two or Four N-Methoxyethyl Pendant Arms and Their Copper(II) and/or Nickel(II) Complexes

  • Kang, Shin-Geol;Kim, Hyun-Ja;Kwak, Chee-Hun
    • Bulletin of the Korean Chemical Society
    • /
    • 제31권9호
    • /
    • pp.2701-2704
    • /
    • 2010
  • This work shows that both L2 and L3 bearing two and four N-$(CH_2)_2OCH_3$ groups, respectively, can be prepared selectively by the reaction of $L^1$ with 1-bromo-2-methoxyethane. The di-N-substituted macrocycle $L^2$ readily forms its copper(II) and nickel(II) complexes. The N-$(CH_2)_2OCH_3$ groups in $[CuL^2]^{2+}$ are coordinated to the metal ion, whereas those in $[NiL^2]^{2+}$ are not involved in coordination. Interestingly, $L^3$ reacts with $Cu^{2+}$ ion to form $[Cu(HL^3)]^{3+}$, in which one tertiary amino group is not involved in coordination.