• 제목/요약/키워드: Alkene

검색결과 54건 처리시간 0.026초

Efficient Synthesis of Benzoprostacyclins Using Free-Radical and Palladium-Catalyzed Tandem Alkene Insertion Strategies

  • 이남호
    • Bulletin of the Korean Chemical Society
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    • 제22권8호
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    • pp.857-866
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    • 2001
  • Efficient syntheses of PGI2 analogue 2a and its epimer 3 have been accomplished. Using aryl iodide 6 as the common intermediate, either radical or palladium-assisted tandem alkene insertion strategies have been employed for construction of the benzoprostacyclin framework.

Quantitative structure activity relationship (QSAR) between chlorinated alkene ELUMO and their chlorine

  • Tang, Walter Z.;Wang, Fang
    • Advances in environmental research
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    • 제1권4호
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    • pp.257-276
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    • 2012
  • QSAR models for chlorinated alkenes were developed between $E_{HOMO}$ and their chlorine and carbon content. The aim is to provide valid QSAR model which is statistically validated for $E_{LUMO}$ prediction. Different molecular descriptors, $N_{Cl}$, $N_C$ and $E_{HOMO}$ have been used to take into account relevant information provided by molecular features and physicochemical properties. The best model were selected using Partial Least Square (PLS) and Multiple Linear Regression (MLR) led to models with satisfactory predictive ability for a data set of 15 chlorinated alkene compounds.

백금/니켈 촉매를 이용한 1,1'-Bis(dimethylhydrosilyl)ferrocene과 Alkynes, Alkenes의 선택적 Hydrosilyation 반응 (Platinum/Nickel Catalyzed Selective Hydrosilylation of Alkynes and Alkenes with 1,1'-Bis(dimethylhydrosilyl) Ferrocene)

  • 김진식;공영건
    • 대한화학회지
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    • 제54권1호
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    • pp.27-37
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    • 2010
  • 1,1'-Bis(dimethylhydrosilyl)ferrocene과 alkynes의 반응에서($C_2H_4$)Pt$(PPh_3)_2$ 촉매경우는 monohydrosilylation과 dihydrosilylation된 비고리화합물의 혼합물이 주로 생성되었고, Ni$(PEt_3)_4$ 촉매 경우는 monohydrosilylation 생성물 또는 dihydrosilylation 생성물만 얻어지는 선택적인 반응을 하였다. 그리고 Alkenes의 반응에서도 monohydrosilylation된 화합물을 얻었다.

An Efficient Synthesis of 12-epi-Carbacyclins Using a Palladium-Mediated Tandem Alkene Insertion Strategy

  • Lee, Nam-Ho;Larock, Richard C.
    • Bulletin of the Korean Chemical Society
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    • 제23권1호
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    • pp.86-92
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    • 2002
  • A short synthesis of novel prostanoids, 12-epi-carbacyclins 3 and 24, has been accomplished using palladium chemistry as a key step. The silyl enol ether 10a prepared through organopalladium chemistry has been allowed to react with 1-octen-3-one in the presence of $Pd(OAc)_2$ to give compound 12 in a single step. The unusual chemo- and stereoselective reduction of the ${\alpha},{\beta}$-unsaturated ketone in 12 has been effected with (S)-BINALH. Subsequent desilylation and Wittig reaction have provided the Subsequent desilylation and Wittig reaction have provided the $PGI_2$ analogues 3 and 24.

Antibacterial Sulfated Alkene from a Tunicate, Styela clava

  • Yun, So-Mi;Jang, Jun-Ho;Ryu, Ji-Eun;Choi, Byeong-Dae;Lee, Jong-Soo
    • Natural Product Sciences
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    • 제13권2호
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    • pp.132-134
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    • 2007
  • An analog of antibacterial sulfated alkene against Bacillus subtilis was isolated from a species of tunicate (Mideoduck), Styela clava, cultured at Jindong Bay, Korea. The structure was determined as 4,8-dimethyl-3-nonenyl sulfate by MS and spectral analysis such as UV IR and NMR.