• Bulletin of the Korean Chemical Society
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• 제24권6호
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• pp.695-702
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• 2003

Recent experimental and theoretical advances on the aromatic alcohol-water clusters are reviewed, focusing on the structure of the hydrogen bonding between the alcoholic OH group and the binding water molecules. The interplay of experimental observations and theoretical calculations for the elucidation of the structure is demonstrated for phenol-water, benzyl alcohol-water, substituted phenol-water, naphthol-water and tropolone -water clusters. Discussion is made on assigning the role (either proton-donating or -accepting) of the hydroxyl group by measuring the shifts of infrared frequency of the OH stretching mode in the cluster from that of bare aromatic alcohol for the experimental determination of the cluster structure.

• 한국연초학회지
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• 제25권1호
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• pp.70-79
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• 2003

$\beta$ -Glucosidase-catalysed synthesis of glucosides with aromatic alcohols and monoterpene alcohols as accepters and cellobiose as a donor in the presence of various commercial $\beta$ -glucosidases were described. $\beta$ -Glucosidases from Aspergillus niger spp,. Trichoderma spp., Penicillium sup. and bitter almond have been shown to catalyze synthesis of $\beta$ -glucosides of benzyl alcohol, 2-hydroxybenzyl alcohol, 4-hydroxybenzyl alcohol, 2-phenylethyl alcohol, geraniol and citronellol in the presence of cellobiose as sugar donor. Among enzyme preparations tested, each $\beta$ -glucosides prepared from Aspergillus niger were isolated in the pure state by Diaion HP-20 and silica gel column chromatography. The products were identified as $\beta$ -glucosyl products of benzyl alcohol, 2-hydroxyhenzyl alcohol, 4-hydroxybenzyl alcohol, 2-phenyl ethyl alcohol, geraniol and citronellol by spectrometry (UV, IR, $^1$H-NMR, $^{13}$ C-NMR) and enzymatic hydrolysis with $\beta$ - glucosidase. Monoterpene alcohols with a sterically hindered hydroxyl group, such as linalool, $\ell$-menthol and $\alpha$-terpineol were not used as acceptors in transglycosylation reaction.

• Applied Biological Chemistry
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• 제41권1호
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• pp.84-88
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• 1998

밤꿀과 밤꽃 향기성분의 연관성을 조사코자 밤꿀은 용매추출과 수증기 증류법을 병행하여, 그리고 밤꽃은 수증기 증류법에 의해 향기성분을 분리한 다음 GC, GC-MS에 의해 확인 비교하였다. 밤꽃으로 부터 14종의 방향족 화합물, 13종의 탄화수소류, 7 종의 지방산류, 4종의 테르펜류, 12종의 함산소 탄화수소류, 7종의 기타 성분 등 64종의 성분이 확인되었고, 밤꿀로 부터는 7종의 방향족화합물, 16종의 탄화수소류, 12종의 지방산류, 1종의 테르펜류, 2종의 함산소 탄화수소류, 3종의 기타 성분 등 41종이 확인되었다. 밤꽃 향기의 주요성분으로는 전체 향기의 49.02%를 차지하고 있는 2-phenyl ethyl alcohol, 1-phenyl ethyl alcohol, benzyl alcohol 등이 주를 이루었고 밤꿀 향기의 특징적인 성분으로는 2-phenyl ethyl alcohol, benzyl alcohol, 1-phenyl ethyl alcohol, 1-(2-aminophenyl) ethanone 등이었다.

• Journal of the Korean Wood Science and Technology
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• 제12권2호
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• pp.27-34
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• 1984

In order to investigate the acidic chlorinated compounds in pulp bleaching spent liquor, the lignin model compounds, coniferyl alcohol(mp $74^{\circ}C$), ${\omega}$-(2-methoxyphenoxy)-acetoguaiacone(mp $93^{\circ}C$) and dehydrodiisoeugenol(mp $133^{\circ}C$), were synthesized and chlorinated by chlorine in glacial acetic acid. From the chlorinated products, the following chlorine-containing aromatic compounds were identified by TLC. In coniferyl alcohol the chlorine-substituted compounds at 4-, 5-and 4,5-position of aromatic nucleus were identified and in ${\beta}$-0-4 type the compounds substituted chlorine for alkyl group and/or hydrogen at land 1,4-position of aromatic nucleus expected to be formed by electrophilic displacement from ${\omega}$-(2-methoxyphenoxy)-acetoguaiacone were not identified but the chlorine-substituted compounds at 4-, 5-, 6- and 5,6-position of aromatic nucleus were identified.

• 한국작물학회지
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• 제42권6호
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• pp.748-751
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• 1997

본 연구는 한국산 마의 괴근 형태로 분류되는 장마와 단마를 개화기에 꽃의 방향 성분과 정유수율을 비교조사하여 향료로서의 기능성을 검토하기 위하여 실험을 수행하였던 바 얻어진 결과를 요약하면 아래와 같다. 1. 마꽃의 방향 성분은 총 26종이 확인되었으며 지방족 알콜류가 다량분포하여 향료 첨가물이나 향수의 기본재료로의 가능성이 있는 것으로 나타났다. 2. 단마는 장마보다 1,2-butyleneglycol은 11배, phenylalcohol은 12배, caproic acid는 28배, cis-3-methylsalicylate는 8배, cinnamic alcohol은 25배, $\alpha$-hexyl cinnamic acid는 13배, laulic acid는 6배 높은 경향을 보였다. 3. 마꽃 방향 성분의 수율은 0.7%로서 그 이용 가능성이 크며 단마가 0.983%, 장마가 0.417%로 단마가 약 2.4배 수율이 높았다. 4. 마꽃의 방향 성분 조성과 정유성분 수율을 감안할 때 마의 부산물인 마꽃을 향료로서의 이용 가능성이 있다고 판단되었다.

• Bulletin of the Korean Chemical Society
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• 제16권6호
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• pp.528-533
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• 1995

Metallic iridium and rhodium powders prepared from the reactions of [M(COD)(PhCN)2]ClO4 (M=Ir(1), Rh(2); COD=1,5-cyclooctadiene) with hydrogen at room temperature in methylene chloride show catalytic activities for hydrogenation of arenes at room temperature under atmospheric pressure of hydrogen. Most substituents (CH3, COOH, NO2, CH2OH, CHO, OPh, OCH3, C=C, halogens and CH2Cl) on aromatic ring suppress the rate of the hydrogenation of the aromatic ring while the aromatic ring hydrogenation of phenol and 1,4-dihydroxobenzene is faster than that of benzene over these metallic powders. Hydrogenation of benzoic acid occurs only at the aromatic ring leaving the COOH group intact over iridium metal powders while benzoic acid is not hydrogenated at all over rhodium metal powders. Carbonyl, nitro, acetylenic and olefinic groups on an aromatic ring are hydrogenated prior to the aromatic ring hydrogenation. Hydrogenolysis of OH groups of phenol, benzyl alcohol and 1,4-dihydroxobenzene, and hydrodehalogenation of halobenzenes, benzyl halides and cinnamyl chloride also occur along with the hydrogenation of aromatic ring.

• 한국연초학회지
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• 제7권1호
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• pp.39-47
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• 1985

Normally cultured aromatic tobaccos, KA 101 and KA 103, were primed progressively in three-leaf segments, either 7 days before bud, bud, or early flower stage with 7 days interval, respectively, The cured leaves were weighed for yield, graded, analyzed for quality-related constituents including volatile aroma components. Also the cured leaves were manufactured and smoked by panelists. Yield and quality by price decreased with advancing ripeness. Reducing sugar, total nitrogen, protein nitrogen decreased with successive ripeness, but reverse in this trends with nicotine, petroleum ether extracts and volatile acids components. Among volatile neutral components, furfural, furfuryl alcohol, benzyl alcohol, penethyl alcohol and p-cresol decreased, but solanone increased with delayed harvest. Neophytadiene, oxysolanone, furfuryl aceton was highest at mid harvest, which was judged to be best by panelists. Mid harvest, first primed at bud stage when leaf color comes to pale green to yellow green, seems to be highly recommendable.

• Bulletin of the Korean Chemical Society
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• 제14권2호
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• pp.281-283
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• 1993

Aromatic nitro compounds are selectively hydrogenated to the corresponding amines in high yields at room temperature and atmospheric pressure using BER-Pd catalyst without affecting ketone, ether, ester, nitrile or chloro groups also present. Especially the nitro group in 4-nitrobenzyl alcohol, methyl 4-nitrobenzyl ether and N-N-dimethyl 4-nitrobenzylamine is selectively hydrogenated with this catalyst to give the corresponding amines without hydrogenolysis of benzylic groups. And aromatic nitro compound can be reduced selectively in the presence of aliphatic nitro compound.

• 한국식품영양학회지
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• 제30권1호
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• pp.120-128
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• 2017

This study aimed to provide volatile flavor compounds of three onion products through thermal process and alcohol fermentation, to meet the quality standard of onion products. The identified components of onion extracts (OE) included 49 (18 sulfur-containing compounds, 5 alcohols, 8 acids, 3 ketones, 4 esters, 4 aromatic compounds, 2 aldehydes, 1 pyrazines and 4 miscellaneous compounds), and 55 (17 sulfur-containing compounds, 15 alcohols, 5 acids, 11 ketones, 3 aromatic compounds, 2 aldehydes and 1 pyrazine) in autoclave-sterilized onion extracts (SOE); and 69 (10 sulfur-containing compounds, 27 alcohols, 11 acids, 11 ketones, 6 esters, 1 aromatic compound and 3 pyrazines) in onion wine (OW), respectively. Among the major flavor classes, sulfur-containing compounds (36.8%), acids (31.3%) and aldehydes (13.6%) in OE were changed to alcohols (46.5%) and ketones (27.3%) in SOE whereas, alcohols (56.3%) and acids (26.6%) in OW. Moreover, 1,3-butanediol, 2,3-butanediol, and 3-hydroxy-2-butanone were highly detected in SOE whereas, acetic acid, 3-methylbutanol, 2-phenylethanol and 1,2,3-propanetriol in OW.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2011년도 제41회 하계 정기 학술대회 초록집
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• pp.200-200
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• 2011

Hierarchical mesoporous ZSM-5 with enhanced mesoporosity was synthesized by microwave through the rapid assembly via ionic interaction between sulfonic acid functionalized ZSM-5 nano particles and cationic surfactant. The catalytic performance of enhanced accessibility due to mesoporosity and acidity were investigated in the alkylation of mesitylene with benzyl alcohol as alkylating agent. The effect of mole ratio of aromatic with benzyl alcohol, reaction time and alkylation agent were also studied. The enhanced mesoporosity and acidity of sulfonic acid functionalized mesoporous ZSM-5 induced activity enhancement compared with non-functionalized mesoporous ZSM-5, sulfonic functionalized mesoporous ZSM-5 synthesized by hydrothermal method and conventional microporous ZSM-5. The sulfonic acid functionalized mesoporous ZSM-5 showed much higher chemoselectivity of benzylated mesitylene than others, whereas the others mainly show dibenzyl ether as product. This significant difference in catalytic selectivity was resulted from the existence of mesopores, which definitely allowed the benzylation in mesopores.