• Journal of the Korean Chemical Society
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• v.15 no.3
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• pp.117-120
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• 1971

Possibility of two phase reduction of carbonyl compounds to the corresponding alcohols was studied. Thus the 0.5 M ether solutions of the representative carbonyl compounds were treated with alkaline stabilized sodium borohydride aqueous solution at room temperature. Butyraldehyde was reduced rapidly within one hr., whereas other aldehydes tested; heptaldehyde, benzaldehyde, and 1-naphthaldehyde were reduced in 6-12 hr. 2-Heptanone was reduced much slowly; 87% in 48 hr., however, acetophenone was reduced moderately; 92% in 12 hr. and cycloalkanones were reduced rapidly (cyclohexanone in 0.5 hr., and cyclopentanone in 3-6 hr.).

• Journal of the Korean Chemical Society
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• v.4 no.1
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• pp.58-61
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• 1957

The organic titanium compounds, $Ti(OR)_4\;and\;Cl_2Ti(OR)_2$ were prepared by adding theoretical amounts of $TiCl_4$ to ROH in the medium of $CCl_4$. Among the compounds of the above two types, the former $Ti(OR)_4$was polymerized by refluxing them with R·OH and water at ordinary temperature and the latter, $Cl_2Ti(OR)_2$, by adding water to them.

• Bulletin of the Korean Chemical Society
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• v.28 no.7
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• pp.1167-1170
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• 2007

A simple and convenient method for the addition of TMSCN to carbonyl compounds is described. NbCl5 is found to possess a strong Lewis acid property to transform carbonyl compounds smoothly to the corresponding cyanosilylether in high yields (up to 99 %) in solvent- free conditions.

• Bulletin of the Korean Chemical Society
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• v.29 no.2
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• pp.323-327
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• 2008

A focused library of pyrazole-based compounds was constructed towards novel transcription factor inhibitors. Complementary hydrogen bonding interaction with b-sheet peptide structures was the basis for the design of 5-amino-3-pyrazole carboxamide scaffold. From the preliminary inhibition assay against several transcription factors, compounds 7e and 8g were identified as novel lead compounds against HIF-1a and NF-AT transcription factors, respectively.

• Bulletin of the Korean Chemical Society
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• v.30 no.5
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• pp.1164-1166
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• 2009

Aromatic aldehydes are efficiently self-condensed into $\alpha$-hydroxy carbonyl compounds by polystyrene-supported ammonium cyanide as an excellent organocatalyst in C-C bond formation. The reaction proceeds in water under mild reaction conditions. The polymeric catalyst can be easily separated by filtration and reused several times without appreciable loss of activity.

• Bulletin of the Korean Chemical Society
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• v.33 no.7
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• pp.2145-2148
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• 2012

A new thiourea based receptor (1) was synthesized and applied to fluoride ion recognition in acetonitrile solution. Receptor 1 displayed dual changes in absorption and fluorescence emission intensities selectively for fluoride ions. The interaction of 1 with fluoride undergoes a deprotonation process that is confirmed by $^1H$ NMR titration.

• Bulletin of the Korean Chemical Society
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• v.14 no.4
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• pp.461-465
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• 1993

Reductive transformations of gem-bromonitro compounds and ${\alpha}$-nitro ketones were carried out conveniently with sodium dithionite by using dioctyl viologen as an electron-transfer catalyst in dichloromethane-water two-phase system:the bromine atom in gem-bromonitro compounds and the nitro group in ${\alpha}$-nitro ketones are replaced by hydrogen.

• Bulletin of the Korean Chemical Society
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• v.18 no.6
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• pp.631-635
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• 1997

Four steroids including two novel compounds have been isolated from a sponge of the genus Tethya. All of the compounds possess a 5α,8α-epidioxy functionality as a common structural feature. Two new steroids, 1 and 2, possess a cyclopropyl ring at C-24(26) of the side chain. The structures of these compounds have been determined by combined spectroscopic methods.

• Bulletin of the Korean Chemical Society
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• v.11 no.3
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• pp.245-248
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• 1990

A series of compounds were synthesized that contain varying number of mesogenic units, 4-n-butylazobenzene moiety, attached to the central benzene ring through ester bond. These compounds were subjected to thermal analysis on a differential scanning calorimeter (DSC) and also on a polarizing microscope. It was found from this study that the presence of mesogenic units in a multi-mesogenic compound does not guarantee for the compound to become mesomorphic and that the linear molecular shape is conducive to form a liquid crystalline phase.

• Bulletin of the Korean Chemical Society
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• v.11 no.3
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• pp.181-183
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• 1990