• YAKHAK HOEJI
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• v.18 no.2
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• pp.157-160
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• 1974

1,8-Naphthalic anhydride reacts with aromatic momocarbo-xylic acids having ${\alpha}$-hydrogen atomes such as p-nitrophenylacetic acid, p-methoxylhenylacetic acid, ${\alpha}$-naphthylacetic acid and diphenylacetic acid in the presence of freshly fused sodium acetate as a catalyst to give 1,8-(${\alpha}$-nitrophenylmalonyl)-naphthalin, 1,8-diphenylmalonyl-naphthalin, respectively. The results of these experiments show that 1,8-naphthalic anhydride yields the beta diketone type condensation products.

• Journal of the Korean Chemical Society
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• v.59 no.4
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• pp.284-288
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• 2015

Three-component one-pot synthesis of 2-amino-3-cyano-7-hydroxy-4H-chromenes, which have been reported from condensation of malononitrile, aryl aldehydes and resorcinol in the presence of L-proline under reflux conditions in ethanol.

• Bulletin of the Korean Chemical Society
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• v.33 no.4
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• pp.1170-1176
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• 2012

An efficient one-pot synthesis of acridinediones by $In(OTf)_3$-catalyzed reactions was developed starting from ${\beta}$-enaminones, aldehydes, and cyclic 1,3-diketones. The key strategies of these reactions involve domino Knoevenagel condensation/Michael addition/cyclodehydration reaction.

• Bulletin of the Korean Chemical Society
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• v.30 no.11
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• pp.2563-2566
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• 2009

The first total synthesis of naturally occurring prorepensin with a bis-geranylated chalcone has been achieved by a convergent sequence. The key strategy involved in the synthesis of prorepensin was chalcone formation by aldol condensation of the corresponding geranylated acetophenone with geranylated benzaldehyde.

• Bulletin of the Korean Chemical Society
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• v.22 no.5
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• pp.476-480
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• 2001

4-Thiazolidinones which are hetarylsubstituted at the 2-position were prepared by the reaction of mercapto acids with aldimines which were prepared by the condensation of pyrrole-2-carbaldehyde with different aromatic amines. After their benzylide ne derivatives were obtained, we first applied the Wittig reagent on them in the presence of triethylamine, dihydrofurothiazolidines were synthesized. Second, we prepared new pyrazolinothiazolidines by using phenylhydrazine in the presence of sodium acetate. All mentioned compounds have been characterized by their spectral data, and screened for their antimicrobial activities. Some of them exhibit moderate to good antibacterial and tuberculostatic activities.

• Bulletin of the Korean Chemical Society
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• v.17 no.6
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• pp.525-528
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• 1996

Seven cali[4]arenes, having two different substituents in AAAB or AABB pattern at the upper rim of calix were synthesized by fragmentation condensation reaction of p-substituted phenol trimer (AAA) with 2,6-bishydroxymethylated 4-substituted phenol (B) or that of dimer (AA) with 2,2'-bishydroxymethylated dimer (BB). An equimolar mixture of the coupling components (trimer and monomer or dimer and dimer) was refluxed in dioxane in the presence of TiCl4to afford calix[4]arene 6 and 7 in 15-38% yield. The structure of calix[4]arenes was confirmed by elemental analysis and the 1H/13C NMR spectroscopy.

• Archives of Pharmacal Research
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• v.22 no.3
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• pp.302-305
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• 1999

An efficient procedure for the preparation of 4-hydroxy-3-{1,2,3,4-tetra-hydro-3-[4-(4-trifluoromethylbenzyloxy)phenyl]-1-naphthyl}thiocoumarin (thioflocoumafen, 1a and 1b) is described. The key step in the synthesis involves the condensation reaction of 3-(4-methoxyphenyl)-1-tetralol (2) with 4-hydroxy-1-thiocoumarin (3).

• Proceedings of the PSK Conference
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• 2002.10a
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• pp.342.1-342.1
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• 2002

6.7-Dicholroquinoline-5.8-dione reacted with 2-aminopyridine derivatives, Out of the four possible products which could be achieved in this reaction. condensation and rearrangement product. 4a.10.11-triazabenzo［3.2-a］ fluorine-5.6-dione was obtained as major product. The definite structure was identified with X-ray crystallographic study. (omitted)

• Proceedings of the PSK Conference
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• 2002.10a
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• pp.345.1-345.1
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• 2002

${\alpha}$-terthienyl the first isolated from natural products shows potent antitumor activity, which encouraged us to study terpyridine and its biological properties. Terpyridine has also been reported as having carcinogenicity, and it's erivatives showed high cytotoxic activities against several human cancer cell lines and topoisomerase I inhibitory ctivity. Mannich free base from condensation reaction was allowed to react with pyridinum salts to give activity. (omitted)

• Macromolecular Research
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• v.10 no.2
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• pp.108-114
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• 2002

Poly(butylene succinate) (PBS) prepolymers were prepared by the condensation polymerization of 1,4-butanediol (1,4-BD) and succinic atid (SCA) in the presence of titanium (VI) isoproxide(TPI) catalyst. The PBS prepolymers reacted with 1,4-BD or SCA to obtain hydroxyl or carboxylic acid group terminated PBS. High molecular weight linear or branched PBS was synthesized by a coupling reaction between hydroxyl and carboxylic acid group terminated PBS, or by a branching reaction between carboxylic acid group terminated PBS and glycerol as a branching agent. The weight average molecular weight of the prepared linear or branched PBS was in the range of 100,000-220,000. Both melting point and thermal stability of the high molecular weight linear and branched PBSs were somewhat higher than those of general PBS. From a tensile behavior by Instron test, modulus, tensile strength and elongation at break improved with increase in the molecular weight of the prepared PBS through the coupling or the branching reaction. In particular, the high molecular weight linear PBS had about 2.5 times higher value in modulus than the branched one.