• Macromolecular Research
• /
• 제15권2호
• /
• pp.191-194
• /
• 2007

• 한국환경과학회:학술대회논문집
• /
• 한국환경과학회 1997년도 정기총회 및 봄 학술발표회 초록집
• /
• pp.61-63
• /
• 1997

• Archives of Pharmacal Research
• /
• 제29권6호
• /
• pp.476-478
• /
• 2006

In order to construct a benzofuran library, we developed a model study of benzbromarone. Synthesis has been achieved in 53% overall yield, starting from phenol via the key intermediate 2-ethylbenzofuran which was afforded by intramolecular Wittig reaction.

• 분석과학
• /
• 제11권3호
• /
• pp.179-188
• /
• 1998

15여종의 페놀 유도체들의 용량인자는 씨클로덱스트린의 농도, 이동상 중 유기용매의 종류와 농도, 온도 등에 영향을 받았다. 페놀유도체들의 머무름은 ${\alpha}$-, ${\beta}$-씨클로덱스트린과의 내포착물 형성에 기인하며, ${\alpha}$-씨클로덱스트린보다 ${\beta}$-씨클로덱스트린을 첨가하였을 때가 내포착물 형성이 훨씬 효과적이었다. 또한 시료의 머무름에 영향을 주는, MeOH, MeCN, THF 유기용매 중 메탄올 용액에서 내포착물 형성효과가 가장 강하고, 메탄올 용액의 농도가 증가할수록 k'값이 감소하였다. $[CD]_T$에 대한 용량인자를 구하여 내포착물의 해리상수, $K_D$값을 측정하고, $pK_D$를 메탄올농도에 대해 도시한 직선의 절편으로부터 100% 물에서의 $K_D$값을 구하였다. 한편, 분리인자, ${\alpha}$는 씨클로덱스트린의 농도뿐만 아니라 $K_D$값 등에 상당히 영향을 받기 때문에, 씨클로덱스트린을 이동상에 첨가하고, 이동상 중 유기용매의 농도와 컬럼온도를 조절하여 페놀 유도체의 몇 가지 이성질체들을 이상적으로 분리하였다.

• Fisheries and Aquatic Sciences
• /
• 제4권4호
• /
• pp.229-237
• /
• 2001

In order to identify of volatile flavor compounds and polycyclic aromatic hydrocarbons (PAHs) in commercial liquid smokes, this study was conducted to analyze volatile flavor compounds by solvent extraction and/or Purge & Trap method/GC/MSD. A total of 156 volatile flavor compounds were detected in 6 commercial liquid smokes, and these compounds were composed mainly of 12 aldehydes, 60 ketones, 7 alcohols, 14 acids, 20 esters, 24 aromatic compounds, 7 furans and 12 miscellaneous compounds. Ketones $(806.6-7,573.9\mu g/mL)$ and aromatic compounds $(282.6-7,896.3 \mu g/mL)$ were more abundant than others. The PAHs known as carcinogen have not been detected in this study. The acids $(422.9-4,903.1\mu g/mL)$ was identified in relatively high concentration compared to other groups. Phenol and its derivatives among aromatic compounds were in relatively high concentration. Especially, the phenol and its derivatives including o-cresol, guaiacol, 4-ethylguaiacol and syringol were in higher concentration.

• Archives of Pharmacal Research
• /
• 제9권3호
• /
• pp.127-130
• /
• 1986

Naturally occurring diallyldihydroxybiphenyl compounds, magnolol and honokiol were reported to have potent antibacterial activities against most of Gram positive bacteria (1-4). To developmore potent antibacterial agents, some allyhydroxybiphenyl derivatives were synthesized from the starting compounds, p-phenyl-phenol (I) p-phenylphenol (IV), o, o-biphenol (VII) and p. p'-biphenol (XII). Among the newly synthesized compounds (III, VI, IX, XI, XIV and XVI), the antibacterial activities of 2-allyl-p-phenylphenol (VI), 6-ally-o, 0'-biphenol (IX), 2, 2'-diallyl-o, o'-biphenol (XIV) and 2, 2', 6-triallyl-p, p'-biphenol (XIV) were more potent than those of magnolol and bonokiol against a cariogenic bacterium, Stroptococcus matans ATCC OMZ 176.

• 접착 및 계면
• /
• 제21권4호
• /
• pp.156-161
• /
• 2020

수계 압력감응점착제(PSA)는 유해성 휘발성유기용매 사용을 최소화할 수 있는 친환경 기술로써 학계와 산업계에서 큰 관심을 받아왔다. 수계 PSA의 합성은 유화중합을 이용하는데 이 때 이용되는 페놀계 계면활성제는 환경 및 인체유해성이 높아 이를 대체할 수 있는 신규 계면활성제 개발이 산업적으로 요구된다. 본 논문에서는 환경유해성 페놀계 CO-436 계면활성제를 대체할 수 있는 스티렌페놀계 계면활성제를 이용하여 수계 PSA를 합성하고 스티렌페놀계 계면활성제의 종류 및 농도에 따른 수계 PSA의 물성과 산업계 응용 가능성에 대해 알아보고자 한다.

• 폴리머
• /
• 제31권4호
• /
• pp.273-277
• /
• 2007

할로겐을 포함하지 않은 난연제를 개발하기 위하여 cyclophosphazene 유도체들을 합성하여 이들을 ABS를 위한 난연제로 사용하여 보았다. Chlorocyclophosphazene에 phenol, catechol, aniline, 1,2-diaminobenzene 등을 반응시켜 각각의 유도체들을 합성하였으며 이들이 ABS에 얼마나 잘 난연성을 나타내는지를 UL94, LOI 등으로 살펴보았다. 이들 난연제를 함유하는 ABS 시료의 물성도 알아보았다. Catechol로부터 합성된 유도체가 가장 우수한 난연 결과를 보여주었으며 phenol로부터 합성된 유도체의 경우에는 novolac과 같은 고분자와 혼합한 다음에 첨가하면, 같은 양의 첨가로 더 우수한 난연성을 보여 주었다.

• Bulletin of the Korean Chemical Society
• /
• 제32권11호
• /
• pp.3887-3892
• /
• 2011

An efficient synthesis of 1,5-Benzothiazepines via Michael addition of corresponding (E)-1-(2-hydroxyphenyl)-3-(4-(phenylthio)phenyl)prop-2-en-1-one is described under ultrasound irradiation. A series of novel 2-((E)-2,3-dihydro-2-(4-(phenylthio)phenyl)benzo[b][1,4]thiazepin-4-yl)phenol derivatives was confirmed on the basis of $^1H$ NMR, Mass, IR spectral data and Elemental analysis. The synthesized compounds were evaluated for their antimicrobial activities. Most of the compounds were found to be comparable potent than the reference standard drugs. Utilization of ultrasound irradiation, simple reaction conditions, isolation, and purification makes this manipulation very interesting from an economic and environmental perspective.

• 한국자기공명학회논문지
• /
• 제21권4호
• /
• pp.135-138
• /
• 2017

Titanium phenoxide and titanium carboxylate derivatives were prepared by ligand exchange of titanium tetraisopropoxide with the corresponding phenol and carboxylic acids. The substitution reactions were analyzed by NMR focused in the liberation of isopropylalcohol. The chemical shift of secondary proton of isopropyl group shifted to upfield after liberation; from 4.47 ppm at titanium-bound to 4.1~4.3 ppm at free alcohol state in $CDCl_3$. The substitution reaction of titanium tetraisopropoxide with carboxylic acid was applied to form dye-Ti complex for dye-sensitized solar cell.