• 제목/요약/키워드: Chloranil

검색결과 9건 처리시간 0.032초

Photochemical Rearrangement of Chloranil

  • Kim, Sung-Sik;Yoo, Dong-Yeol;Cho, In-Ho;Shim, Sang-Chul
    • Bulletin of the Korean Chemical Society
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    • 제8권4호
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    • pp.296-298
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    • 1987
  • Irradiation of a solution of chloranil and cycloheptatriene, or 1,3-cyclohexadiene, in dichloromethane yielded unexpected photorearrangement products as the major product, while chloranil with cyclohexene gave the photorearrangement product as well as 1 : 1 adduct.

The Synthesis of Novel Mono(alkoxy)-, Tris(thio)- and Tetrakis(thio)-Substituted Quinones from the Reactions of p-Chloranil with Various S-Nucleophiles

  • Ibis, Cemil;Yildiz, Mahmut;Sayil, Cigdem
    • Bulletin of the Korean Chemical Society
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    • 제30권10호
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    • pp.2381-2386
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    • 2009
  • The tetrakis(thio)-substituted-1,4-benzoquinone products 4a-e, 6, 7, and the mono(alkoxy)-tris(thio)-substituted-1,4- benzoquinone products 5a-e and 8a-e were synthesized from the reactions of p-chloranil with some thiols and mixture of two different thiol compounds in alcohol in the presence of $Na_2CO_3$ at room temperature. The structures of the novel S,S,S,S- and S,S,S,O- substituted products, which were obtained by the reactions of p-chloranil as a starting compound with n-propanethiol, n-pentanethiol, n-decanethiol, n-dodecanethiol, 2-methyl-2-propanethiol, and mixture of n-decanethiol and n-cyclohexanethiol as S-nucleophiles, were characterized by spectroscopic methods.

파라퀴논 유도체와의 전하이동착물 형성을 이용한 에녹사신 정량 (The Determination of Enoxacin with p-Quinone Derivatives)

  • 이지연;김동오;남수자;정문모;허문회;안문규
    • 약학회지
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    • 제43권4호
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    • pp.437-441
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    • 1999
  • Enoxacin[1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-\piperazinyl)-1,8-naphthyridine-3-carboxylic acid, ENX] is a new quinolone antibacterial agent. The method is based on the highly colored charge-transfer complex formation of this drug as a $\pi$-electron donor with 7,7,8,8-tetracyanoquinodimethane(TCNQ) or chloranil(CL) as $\pi$-acceptors. The colored products were measured spectrophotometrically at 842 nm and 552 nm for TCNQ and CL, respectively. The different experimental conditions are optimized. The linearities for TCNQ and CL were $1.6{\;}\mu\textrm{g}/mL~32{\;}\mu\textrm{g}/mL$ and $6.4{\;}\mu\textrm{g}/mL~160{\;}\mu\textrm{g}/mL$, respectively and colors were produced in non-aqueous media. This report describes a simple and ra\pid method for the analysis of enoxacin.

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Catalytic Cyclopolymerization and Copolymerization of Diethyl Dipropargylmalonate by (toluene)Mo$(CO)_3

  • 전상진;심상철;조찬식;김태정;갈영순
    • Bulletin of the Korean Chemical Society
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    • 제21권10호
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    • pp.1044-1046
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    • 2000
  • Catalytic copolymerization of diethyl dipropargylmalonate (DEDPM) and phenylacetylene (PA) by Mo(CO)6 and (toluene) Mo(CO)3/chloranil has resulted in the expected copolymer consiting of a polyene backbone with five-and/or six-membered rings and th e PPA structure. Both complexes exhibited not only varying degree of catalytic activity depending upon the relative mole ratio of two monomers but also characterize the types of coploymers. The former yields the polyene backbone containing only five-membered rings as well as PA while the latter produces the polymers consisting of both five-and six-membered ring structure. Comparative studies show that Mo(CO)6 exhibits reactivity toward DEDPM alone, thus catalyzing initially metathesis cyclopoly-merization of DEDPM followed by copolymerization with PA while the (toluene)Mo(CO)3/chloranil system shows affinity for both PA and DEDPM.

나프탈렌 및 그 유도체들과 클로라닐의 전하이동 착물에 관한 연구 (A Study on Charge-Transfer Complexes of Naphthalene and Derivatives of Naphthalene with Chloranil)

  • 문정대;장춘학
    • 대한화학회지
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    • 제37권3호
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    • pp.335-343
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    • 1993
  • 나프탈렌, ${\alpha}$- 또는 ${\beta}$-메틸 나프탈렌 그리고 1,2- 1,3- 또는 2,6-디메틸나프탈렌과 클로라닐의 전하이동 착물의 흡수 극대 파장은 염화에틸렌, 염화메틸렌, 클로로포름 용매에서 그리고 10, 15, 20, 25$^{\circ}C$ 온도에서 자외선 분광광도법으로 측정하였다. 이 전하이동착물은 1:1 분자비로 결합하였으며 흡수극대 파장은 용매의 극성과 온도에 따라 변하였고, 형성상수(K$_f$)는 용매의 극성 그리고 온도가 증가함에 감소하였다. 이와같이 온도 및 용매가 형성상수에 미치는 효과를 열역학적 고찰로써 논의하였으며, 또한 전자주개들의 전자 및 입체 효과가 형성상수에 미치는 영향도 논의하였다.

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Reactions with Maleimides VII: Synthesis of Several New Pyrazolonyl-pyrrolidino[3,4-d]pyrazoline and Pyrazolonyl-pyrolo [3,4-d]pyrazole Derivatives

  • Ghabrial, Sami-S.
    • Archives of Pharmacal Research
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    • 제13권4호
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    • pp.338-341
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    • 1990
  • Several new pyrazoloyl-pyrrolidino[3, 4-d]pyrazolidines and pyrazolonyl-pyrrolo[3, 4-d] pyrazoles were synthesised via the reaction of N-arylaleimides with the phynylhydrazones of 3-methyl-4-formyl-2-pyrazoline-5-one and 1-phenyl-3-methyl-4-formyl-pyrazolin-5-one and treating of the resulting adducts with chloranil. Structures were based on elemental analyses and spectral data.

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1,2,3,4-테트라하이드로카바졸 및 그 유도체들과 클로라닐의 전하이동 착물에 관한 연구 (A Study on Charge Transfer Complexes of 1,2,3,4-Tetrahydrocarbazole and Some Derivatives with Chloranil)

  • 문성배;문정대
    • 대한화학회지
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    • 제37권11호
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    • pp.929-936
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    • 1993
  • 몇 가지의 전자주개와 하나의 전자받개와의 전하이동 착물에 관한 연구는 세 종류의 용매 즉, 염화에틸렌, 염화메틸렌 그리고 클로로포름하에서 그리고 16, 19, 22, 25$^{\circ}$C의 온도범위에서 자외선 분광광도계로서 최대흡수파장 및 흡광도를 측정하였다. 그리고 이 연구는 전자주개로서는 1,2,3,4-테트라하이드로카바졸, 2-메틸, 3-메틸 그리고 3-에킬사수소카바졸을 선택하였으며 전자받개로는 클로라닐을 이용하였다. 이 전하이동 착물은 1:1 몰비로 형성되었으며, 최대흡광도 및 형성상수는 용매의 극성과 온도에 따라 감소하였다. 열역학적 양으로서 용매의 극성과 온도가 형성상수에 미치는 영향을 논하였으며, 또한 몇 가지의 전자주개들의 전자 및 입체효과가 형성상수에 미치는 효과를 고찰하였다.

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Heterocyclic Systems Containing Bridgehead Nitrogen Atom:Synthesis and Evaluation of Biological Activity of Imidazo[2,1-b]-1,3,4-thiadiazolo [2,3-c]-s-triazoles, s-Triazolo[3,4-b]-1,3,4-thiadiazolo[3,2-b]imidazo[4,5-b]quinoxaline and bis-(s-Triazolo[3,4-b]-1,3,4-thiadiazolo[3,2-b][imidazo[4,5-b]-cyclohexane]-5a,6a-diene)

  • Kumar, Parvin;Kuamr, Ashwani;Mohan, Late Jag;Makrandi, J.K.
    • Bulletin of the Korean Chemical Society
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    • 제31권11호
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    • pp.3304-3308
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    • 2010
  • Condensation of 4-amino-5-mercapto-3-($\alpha$-naphthyl)-s-triazole (1) with cyanogen bromide gives 6-amino-3-($\alpha$-naphthyl)-s-triazolo[3,4-b]-1,3,4-thiadiazole (2) which on condensation with chloranil yields 3,9-di-($\alpha$-naphthyl)-6,14-dioxo-bis-(s-triazolo[3,4-b]-1,3,4-thiadiazolo[3,2-b]imidazo[4,5-b]cyclohexane]-5a,6a-diene) (3). 3-($\alpha$-naphthyl)-s-triazolo[3,4-b]-1,3,4-thiadiazolo[3,2-b]imidazo[4,5-b]quinoxaline (4) is obtained by a similar condensation of (2) with 2,3-dichloroquinoxaline. The reaction of (2) with $\alpha$-haloketones followed by bromination affords 7-aryl-3-($\alpha$-naphthyl)-imidazo[2,1-b]-1,3,4-thiadiazolo[2,3-c]-s-triazoles (5) and their 6-bromo analogues 6 respectively. The structures of all newly synthesized compounds were established on the basis of elemental analyses, IR, $^1H$-NMR. The antibacterial and antifungal activities of all newly synthesized compounds have also been evaluated.

국내산 컴프리의 형태학적 특성 및 Pyrrolizidine Alkaloids 분석 (Studies of Morphological Properties and Pyrrolizidine Alkaloids Analysis of Comfrey Cultivating in Korea)

  • 김희연;홍진환;김동술;한상배;이은주;강길진;육창수;박종희;배기환
    • 한국식품영양과학회지
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    • 제32권6호
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    • pp.790-794
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    • 2003
  • 본 연구에서는 국내에서 재배되고 있는 컴프리의 형태학적 특성 및 pyrrolizidine alkaloids을 분석하기 위해서 수행되었다. 국내에서 채취한 12개 지역의 컴프리를 대상으로 형태학적 인 연구를 실시한 결과 모두 한 종류의 Symphytum officinale임을 확인할 수 있었다. 또한 이들 시료를 hot methanol과 ultra-sonification으로 추출하여 pyrrolizidine alka loids 함유 여부를 확인하기 위하여 TLC 시험을 실시한 결과, 12개 시료의 컴프리는 o-chloranil과 Ehrlich's reagent의 발색시약이 pyrrolizidine alkaloids와 반응하여 특이적인 purple spot을 나타내었다. 그러나 치커리, 호박잎 및 깻잎을 사용하여 동일한 시험을 실시한 결과 purple spot이 관찰되지 않음을 알 수 있었다. HPLC 패턴을 분석 결과, 12개 시료의 컴프리는 retention time 30 부근에 특이적인 peak를 나타내었으나, 치커리, 호박잎 및 깻잎은 peak를나타내지 않았다. 따라서 국내 재배중인 컴프리 12종은 형태학적 특성 및 pyrrolizidine alkaloids로 조사한 결과, S. officinale 종임을 확인할 수 있었다.