• Bulletin of the Korean Chemical Society
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• v.35 no.1
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• pp.273-276
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• 2014

• Korean Journal of Microbiology
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• v.16 no.1
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• pp.11-15
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• 1978

Glucose and galactose were the inhibitors of pigmentation of Serrratia marcescens. Other sugars, however, even the fructose which is the structural isomer of glucose and galactose did not affect to pigmentatioin. The yield of pigmentation was descreased when the glucose was added to culture medium. And it was known to that the antibiotics was roled as the inhibitors of pigmentation. The limit concentration of the inhibitors were as followings :rifampicin, $1{\mu}g/ml$. Addition of rifampicin$(1{\mu}g/ml)$ at 6 hrs cultures inhibited the formation of pigment completely.

• Journal of the Korean Chemical Society
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• v.21 no.3
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• pp.161-170
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• 1977

Several Pt(II) complexes containing glycine (or glycino anion) and styrene have been prepared, and their structures have been confirmed by infrared spectroscopy. The results confirm the structure of chloro(glycino)(styrene)platinum(II) in which the nitrogen atom of the chelated glycino anion is coordinated to the platinum in the trans position to styrene (N-trans isomer).

• Proceedings of the Korean Society of Crop Science Conference
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• 2004.04a
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• pp.122-123
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• 2004

• Bulletin of the Korean Chemical Society
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• v.16 no.1
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• pp.12-16
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• 1995

The diastereoselectivity of addition reaction of crotylmetal reagents to cobalt-complexed acetylenic aldehydes and metal-free aldehydes was examined. The anti-diastereomer was the predominant product when the crotyl metallics were Cr, Sn, and Zr. In THF, the uncomplexed aldehydes normally gave higher anti-diastereoselectivity. However, the cobalt-complex of silicon-substituted propynals with three bulky substituents produced increased proportions of syn-diastereomer. In DMF, the selectivity shifted towards syn-isomer except in the case of dimethylphenylsilyl substituent. When tributylstannane was used in the presence of BF3 etherate, moderate syn- selectivity was observed with uncomplexed aldehydes, but only decomposed products from complexed aldehydes.

• Bulletin of the Korean Chemical Society
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• v.1 no.1
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• pp.23-26
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• 1980

Direct photoisomerizations of benzalpyrrolinones yield the corresponding E-isomers via a singlet state, since no effect of oxygen on the reaction rates was observed. The Z-oxodipyrromethene was photoisomerized to the E-isomer in a degassed system. In an aerobic system the oxodipyrromethene 3 was photoisomerized at the early stage of the reaction and photooxygenated slowly at latter stage of the reaction. For bilirubin, other (possibly Z ${\to}$ E) than self-sensitizing $^1O_2$ reaction should have occurred because of the lack of a solvent effect on the self-sensitized photooxidation reaction rate at the early stage.

• Bulletin of the Korean Chemical Society
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• v.9 no.4
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• pp.195-198
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• 1988

(-)-(1R, 2R) and (+)-(1S, 2S)-menthyl-trans-2-phenylcyclopropanecarboxylat e have been synthesized with the aid of chiral Cu(II) complex catalyst by the addition reaction of l-menthyldiazoacetate to styrene. The yield was 75%, with the purity of trans isomer over 95% and the optical purity of 95%.

• Proceedings of the PSK Conference
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• 2002.10a
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• pp.390.2-390.2
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• 2002

The fruits of cardamon (family Zingiberaceae) are used in traditional medicine for the treatment of several ailments. such as stomach disorders, liver abscess, and infection of the throat, and as a common spice as well, Amomum tsao-ko Crevost et Lemarie. a Zingiberaceous plant called "초과" in korea, is an oriental folk medicinal herb for the treatment of stomach illness. The present paper reports the isolation of the constituents of the fruits of this plant and their antifungal activity. (omitted)

• Archives of Pharmacal Research
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• v.10 no.1
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• pp.50-59
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• 1987

(E)-2-Phenylcyclopropylamine ((E)-TCP), (Z)-2-Phenylacyclopropylamine ((Z)-TCP), (E)-1-methyl-2-phenylcyclopropylamine ((E)-MTCP), and (Z)-1-methyl-2-phenylcyclopropylamine ((Z)-MTCP) were synthesized and used to determine to what extent 1-methylsubstitution and stereochemistry of 2-phenycyclopropylamines affect inhibition of monoamine oxidase (MAO). Inhibition of rat brain mitochondrial MAO-A and B by the compounds were measured using serotonin and benzylamine as the substrate, respectively and $IC_{50}$ values obtianed with 95% confidence limits by the method of computation. For the inhibition of MAO-A, (E)-MTPC ($IC_{50}$ = 6.2 * $10^{-8}$M) was found to be 37 times more potent than (Z)-MTCP ($IC_{50}$ = 7.8 * $10^{-8}$M), was 7 times more potent than (Z)-MTCP($IC_{50}$= 4.7 * $10^{-7}$M) and (E)-TCP($IC_{50}$ =7.8 * $10^{-8}$M),0.6 times as potent as (Z)- TCP ($IC_{50}$ = 4.4 * $10^{-8}$M). The results suggested that while without 1-methyl group, potency of a (Z)-isomer was comparable to that of (E)-isomer, the methyl group in its (Z)-position was very unfavorable to the inhibition of MAO and that in its (E)-position, the methyl group contributed positively to the potency as found by the fact that (E)-MTCP was 1-5 times more potent than (E)-TCP. In view of the selective inhibition of MAO-A- or B over MAO-A and 1-methyl substitution as well as the stereochemical factors did not significantly influence the selectivity.

• Applied Chemistry for Engineering
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• v.20 no.3
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• pp.335-338
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• 2009

As important intermediates for blue emitting materials of organic light-emitting diodes, bromotriphenylethylene derivatives for distrylarylenes are prepared by reactions of bromobenzophenone with benzylphosphonates. The reaction produces a 60 : 40 mixture of (Z)- and (E)-geometric isomers that are difficult to be resolved. The (Z)-isomer is successfully isolated by a selective recrystallization process using 2-propanol as a solvent. The X-ray structure analysis of (Z)-isomer shows that dihedral angles between tert-butylphenyl ring and bromophenyl ring and between bromophenyl ring and phenyl ring are $56.5(4)^{\circ}$ and $74.1(4)^{\circ}$, respectively.