• 공업화학
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• 제33권4호
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• pp.440-443
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• 2022

만성 췌장염 치료제로 가장 널리 사용되고 있는 camostat mesylate 합성의 key step에 대한 연구를 수행하였다. Camostat mesylate는 두 중간체인 GBA (4-guanidinobenzoic acid hydrochloride)와 DOHA [2-(dimethylamino)-2-oxoethyl-2-(4-hydroxyphenyl)acetate]의 esterification 반응을 통해서 합성되는데, 기존의 esterification 방법 적용 시에는 낮은 수율과 고가의 시약으로 인한 문제점이 제기되어 왔다. 이런 문제점을 극복하고자 본 연구에서 Vilsmeier-Haack 반응을 이용하여 GBA의 acid 작용기를 activating하여 DOHA와 coupling하여 80%의 높은 수율로 Camostat mesylate를 제조할 수 있는 새로운 경제적인 합성법을 개발하였다.

• Bulletin of the Korean Chemical Society
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• 제23권1호
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• pp.41-47
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• 2002

The reactions of 3-methyl-1-phenyl-5-oxo-${\Delta}^2$-pyrazoline-4-thiocarbohydrazide towards phenyl isothiocyanate, sodium nitrite, cyclohexanone, aromatic aldehydes, and carbon disulphide has been studied. The Vilsmeier-Haack reaction has been applied on 4-substituted pyrazolone derivatives.

• 대한화학회지
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• 제56권3호
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• pp.341-347
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• 2012

A series of 2-(4-chlorophenylimino)-5-((3-(p-substituted phenyl)-1-phenyl-1H-pyrazol-4-yl) methylene) thiazolidin-4-one ($\mathbf{3a-h}$) compounds were prepared from the 2-(4-chlorophenylimino) thiazolidin-4-one ($\mathbf{1}$) and 1-phenyl-3-(p-substituted phenyl)-1H-pyrazole-4-carbaldehyde ($\mathbf{2a-h}$). All compounds were characterized by elemental (C, H, N) analysis and spectral (FT-IR, $^1H$ NMR and GC-MS) analysis. These newly synthesized compounds were screened for their antibacterial and antifungal activities. Antimicrobial activity was observed and evaluated against the bacterial strains like Eschericha coli (MTCC 443), Pseudomonas aeruginosa (MTCC 1688), Staphylococcus aureus (MTCC 96), Streptococcus pyogenes (MTCC 442) and against the fungal strains like Candida albicans (MTCC 227), Aspergillus niger (MTCC 282) and Aspergillus clavatus (MTCC 1323). All the synthesized compounds were found to possess moderate to excellent antimicrobial activity against above selected strains.