• Archives of Pharmacal Research
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• v.28 no.10
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• pp.1105-1110
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• 2005

Novel anomeric branched carbocyclic nucleosides were synthesized from 1,3-dihydroxy acetone. 4'-Hydroxymethyl was installed by [3,3]-sigmatropic rearrangement reaction and 1'-methyl group was introduced by carbonyl addition of methylmagnesium bromide. The coupling of nucleosidic bases and desilylation afforded a series of novel nucleosides. The synthesized compounds $16{\~}19$ were evaluated for their antiviral activity against HIV-1, HSV-1, HSV-2, and EMCV. Compounds 16 and 19 exhibit toxicity non-related to any anti-HIV-1 activity.

• Bulletin of the Korean Chemical Society
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• v.25 no.12
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• pp.1924-1928
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• 2004

Allylations of N-benzyl and N-methyl cyclic imides were accomplished successfully under mild Barbier type conditions using zinc metal, allyl bromide and catalytic amount of $PbBr_2$. Subsequent coupling reactions with some carbon nucleophiles afforded 1,2- and 1,4-addition products in moderate to high yields.

• Bulletin of the Korean Chemical Society
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• v.30 no.12
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• pp.3031-3033
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• 2009

A new colorimetric anion sensor 1 has been synthesized based on both Fat brown RR dye and a nitrophenyl group. This new receptor 1 could recognize the presence of fluoride ion effectively and selectively by the change of color of solution. In addition, receptor 1 shows higher affinity for acetate, dihydrogenphosphate, and hydrogensulfate than the other anions such as chloride, bromide, iodide, perchlorate, and nitrate in acetonitrile.

• Journal of Plant Biology
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• v.30 no.2
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• pp.109-116
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• 1987

Effects of staining, buffer washing and denaturing agents on the transferrability of RNA fractionated on a methylmercury hydroxide-agarose gel to a nitrocellulose membrane were studied. Ethidium bromide staining and ammonium acetate buffer washing inhibited RNA transfer, while 3% HCHO and 0.5 M NaOH treatments stimulated transfer which was negated in the ammonium acetate buffer. Accordingly, maintenance of primary structure of RNA was proved to be essential for transferring RNA from the methylmercury hydroxideagarose gel to the nitrocellulose membrane.

• YAKHAK HOEJI
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• v.27 no.2
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• pp.181-184
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• 1983

DMSO-oxalyl chloride at low temperature in methylene chloride reacted with isolated secondary hydroxyl groups in some monosaccharides to give alkoxysulfonium salts, convertible to carbonyls in high yields upon addition of triethylamine. And 1, 2:5, 6-di-O-isopropylidene-.alpha.- D-allofuranose which is the key intermediate in the synthesis of 3-O-acetyl-5-O-benzoyl- 2-deoxy-2- fluoro-D-arabinofuranosyl bromide, was also obtained by oxidizing 1, 2:5, 6-di-O-isopropylidene-.alpha.- D-glucofuranose with the oxidizing reagent, followed by reduction with sodium borohydride.

• Bulletin of the Korean Chemical Society
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• v.24 no.5
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• pp.613-616
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• 2003

Effect on hydrothermal treatment of lamellar vanadium oxides was investigated and the formation of hexagonal and cubic mesophase was found. This lamellar materials were prepared by mixing of cetyltrimethylammonium-bromide and pH-controlled sodium metavanadate solution. Thermal method and UV/O₃treatment were applied to extract organic template. The structure of resulting product was studied by powder X-ray diffraction and transmission electron microscopy (TEM).

• Bulletin of the Korean Chemical Society
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• v.9 no.1
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• pp.13-15
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• 1988

Several types of resocinols have been monobrominated in the ring in good yields with sodium bromide in the presence of 18-crown-6 on oxidation with m-chloroperbenzoic acid. Monoiodination takes place with 2'-(1-methylcyclohexen-3-yl)-5-(1,1-dimethylheptyl )-resocinol when sodium iodide is employed. This new reagent system, MX/18-crown-6/m-CPBA (M =$K^+, Na^+, X = Br^-, I^-X$ ), effects the regiospecific halogenation of activated aromatic ring over olefinic double bond.

• Bulletin of the Korean Chemical Society
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• v.9 no.1
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• pp.25-27
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• 1988

N-Phenylcysteine (1) was prepared as a hydrobromide in good yield from the acid hydrolysis of 4-carboxy-2-methyl-3-phenyl-${\Delta}^\;2$-thiazolinium bromide (5), which was derived from the reaction of thioacetanilide and $\alpha$ -bromoacrylic acid. The treatment of ethyl ester(6) of N-phenylcysteine with 2,2-dimethoxypropane rendered it to ethyl 2,2-dimethyl-3-phenylthiazoline-4-carboxylate (7).

• Bulletin of the Korean Chemical Society
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• v.13 no.1
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• pp.48-53
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• 1992

The reactions of ${\beta}-aryl-{\alpha},{\beta}-epoxy$ silanes with magnesium bromide or magnesium iodide in the presence of excess magnesium in ether at room temperature afforded vinylsilanes in 18-100% yields. E-Vinylsilanes were predominant over Z-isomers (> 80%) regardless of the stereochemistry of ${\alpha},{\beta}-epoxy$ silanes.

• Bulletin of the Korean Chemical Society
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• v.16 no.12
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• pp.1208-1212
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• 1995

A 86:14 isomeric mixture of 3,4-[3'-(dichlorosilyl)isopropyl]benzo-1,1-dichloro-1-silacyclopentene and 3,4-[2'-(dichlorosilyl)isopropyl]benzo-1,1-dichloro-1-silacyclopentene was prepared by the regioselective Friedel-Crafts reaction of allyldichlorosilane with 3,4-benzo-1,1-dichloro-1-silacyclopentene catalyzed by Lewis acid AlCl3. The structure of the products was confirmed by methylation with methylmagnesium bromide and by methoxylation with trimethylorthoformate.