• Korean Chemical Engineering Research
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• 제43권2호
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• pp.202-205
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• 2005

GoAgg 생체모방계 산화반응시스템을 이용하여 상온, 상압에서 시크로헥산을 산화 반응하여 시크로헥산올과 시클로헥산온 제조를 위한 연구를 수행하였다. 반응속도론적 연구를 수행하였으며 리간드로 카르복실기를 포함하는 picolinic acid를 사용한 경우 철 촉매만 사용한 경우에 비해 15배 이상의 활성이 증가하였다. 특히 피리딘환이나 이미다졸환에 ortho 위치에 카르복실기를 포함한 경우 meta, para 위치보다 반응성이 크게 증가하였다. 이 결과로부터 새로운 매커니즘을 제안하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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• pp.63-63
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• 2007

Carboxylated multi-walled carbon nanotubes (MWNTs) were in detail characterized by XRD, XPS, FTIR, and thermogravimetric measurements. Carboxylic acid groups were functionalized to MWNTs using aqueous acid solutions. The change. of sonication and reflux conditions rarely influenced the degree of carboxylation on MWNTs, but reduced the thermal stability of the resulting carboxylated MWNTs. The characteristic Bragg peaks of pristine and carboxylated MWNTs were analyzed by XRD measurements. After acid treatment the diffraction peaks (100), (101), and (102) of pristine MWNTs disappeared, but the diffraction peak (002) was preserved in the carboxylated MWNTs. The introduction of carboxylic acid groups on MWNTs caused to improve the dispersibility of the resulting carboxylated MWNTs in water.

• 대한화학회지
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• 제15권2호
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• pp.65-68
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• 1971

The possibility of the two-phase oxidation of an aldehyde to carboxylic acid was studied. Thus the ether solutions of representative aldehydes (2.0M) were treated with 1.5 mole equivalent of chromic acid solution (1.0M) for 30 minutes at room temperature. Of the ten aldehydes tested,m butanal, benzaldehyde, tolualdehyde, o-, m-, p-nitrobenzaldehyde and cinnamaldehyde could be oxidized conveniently to the corresponding carboxylic acid giving an 80-90% yield. But furfural gave only a 30% yield of furoic acid and the oxidation of salicylaldehyde was unsuccessful.

• 한국응용과학기술학회지
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• 제22권3호
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• pp.219-227
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• 2005

Competitive solvent extraction of the mixure of alkali metal and alkaline earth cation from water into organic solvent containing the crown ether carboxylic acid and anlogous crown ether phosphonic acid was investigated as follows. The lipophilic group is found to strongly influence to the selective extraction in the mixed systems from only alkali metal cation for sym-(n-decyldibenzo)-16-crown-5-oxyacetic acid $\underline{1}$ to mostly alkaline earth metal cation for sym-bis[4(5)-tert-butylbenzo]-16-crown-5-oxyacetic acid $\underline{3}$. Monoethyl sym-(n-decyldibenzo)-16-crown-5-oxymethylphosphonic acid $\underline{2}$. and monoethyl-sym- bis]4(5)-tert-butylbenzo]-16-crown-5-oxymethylphosphonic acid $\underline{4}$ showed good selectivity for $Na^+$ over $Mg^{2+}$, the second extracted ion. Structural variation in the crown ether phosphonic acid somewhat was influenced to the extraction selectivity in the mixed systems. when variation of the ionized group is influenced in the mixed systems, the selectivity of $Na^+$ as the second extracted ion was much better crown ether carboxylic acid $\underline{1}$ than crown ether phosphonic acid $\underline{2}$, while the efficiency of $Na^+$ extraction was better $\underline{2}$ (83% total loading) than $\underline{1}$ (32%).

• Bulletin of the Korean Chemical Society
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• 제25권7호
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• pp.1085-1087
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• 2004

• 약학회지
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• 제7권1호
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• pp.8-12
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• 1963

The piperazine salts with 24 kinds of phenols and 6 kinds of organic carboxylic acids were prepared. The test of anthelmintic effect against Ascaris suilla, in vitro, for Hexachlorophene-piperazine salt, Bithionol-piperazine salt, Kainic acid-piperazine salt were also carried out compared with piperazine, Hexachlorophene, Bithionol and Kainic acid.

• Bulletin of the Korean Chemical Society
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• 제10권6호
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• pp.547-551
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• 1989

1-Methoxypyrrole-2-carboxylic acid and its derivatives were prepared. Fridel-Crafts bromination occurs first at 4-position and then at 5-position. Acylation of 3-methyl derivative was also directed to 4-position.

• 약학회지
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• 제31권1호
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• pp.14-18
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• 1987

2-Substituted-3, 4-dihydro-2H-1, 2-benzothiazin-4-one 1, 1-dioxide 6 was reatced with magnesium methyl carbonate to form magnesium chelate 7, which could be hydrolized in cold hydrochloric acid solution to give 2-substituted-4-hydroxy-2H, 1, 2-benzothiazine-3-Carboxylic acid 1, 1-dioxide 2 in good yield.

• 약학회지
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• 제10권2_3호
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• pp.8-11
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• 1966

항인결핵균성및 streptomycin, isoniazid및 para-aminosalicylic acid에 대한 내성인결핵균주에 현저한 항균작용 있는 dextro-2,2'-(ethylenediimino)-di-1- butanol(Ethambutol) 계열 및 thioureido(-NHCSNH-) 함유화 합물 계열인 2,2'-(ethylenediimino)-di-1-butyric acid및 2,2'-(thioureido)-di-1-butyric acid를 합성했으며 이들 약물의 구조와 작용간의 상호관계를 설명코저 이들 화합물과 류사한 구조인 2,2'-(thioureido)-di-acetic acid를 합성했기에 보고함.

• 미생물과산업
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• 제13권1호
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• pp.10-13
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• 1987

L-Azetidine-2-carboxylic acid(A-2-C) is a four-membered cyclic imino acid which was first discovered from Convalaria majalis and Polygonatum officinalis in 1955(1,2). The imino acid A-2-C has been identified in at least 16 species of plants (3) (mostly the families Liliaceae, Agavaceae and Amaryllidaceae); in two marine sponges (Haliclona sp. and Chalinospilla sp.) (4); in the red algae (Lophocladia lamenandi) (5); in the sugar beet Beta vulgaris (6) ; and the microorganism Actinoplanes ferrugineus (7).