• 한국동물위생학회지
• /
• 제28권1호
• /
• pp.81-89
• /
• 2005

Recently, mass spectrometry coupled with liquid chromatography (LC/MS) has been a preferred technique for determination of organic compounds in complex matrixes. LC/MS provides a high degree sensitivity and specificity of the compounds of interest. The purpose of this study was to confirm analytical method of residual 6 benzimidazoles (thiabendazole, oxfendazole, mebendazole, albendazole, flubendazole and fenbendazole) in meat by LC/MS. Benzimidazoles were analyzed by LC/MS on XTerra $C_{18}$ column with 0.01% trifluoroacetic acid-acetonitrile (TFA) in a gradient mode as mobile phase, and that were identified by electrospray ionization with selected ion recording mode at 150-350 amu mass range. Residual benzimidazoles were extracted from tissue with ethylacetate, and elute benzimidazoles with $50\%$ acetonitrile. In the LC/MS analysis of benzimidazoles, signal to noise ratio was showed relatively high in the positive mode and special ion in the quality analysis was determined via $[M+H]^+$ and Fragment ions. A spectrum of benzimidazoles was showed from all 6 benzimidazoles

• Bulletin of the Korean Chemical Society
• /
• 제33권12호
• /
• pp.4188-4190
• /
• 2012

• 한국동물위생학회지
• /
• 제26권2호
• /
• pp.157-162
• /
• 2003

This stud was attempted to detect six benzimidazoles[thiabendazole(TBZ), oxfendazole(OFZ), mebendazole(MBZ), flubendazole(FLBZ), albendazole(ABZ), and febendazole(FBZ)] in eggs using high performance liquid chromatography(HPLC) with photodiode array detector(DAD) simultaneously. The eluates were determined by HPLC on a waters X-Terra$^{TM}\;C_{18}$ reverse-phase column($4.6{\times}250nm,\;5{\mu}m$) with DAD at 295nm. The mobile phase was 0.04M ammonium phosphate(pH 7.5)/ACN(62.28 v/v) run isocratically. The calibration curves were linear(r>0.999) for six benzimidazoles. Average recovery rate from eggs were 94.54% for TBZ, 97.71% for OFZ, 88.82% for MBZ, 93.71% for FLBZ, 78.61% for ABZ, and 75.09% for FBZ, respectively. The limits of detection and quantification were 2.27ppb, 3.88 for TBZ, 9.34ppb, 15.61ppb for OFZ, 28.53ppb, 45.15ppb for MBZ, 27.39ppb, 40.95ppb for FBZ, 8.61ppb, 13.95ppb for ABZ and 12.79ppb, 22.34ppb for FBZ, respectively.

• 대한약학회:학술대회논문집
• /
• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
• /
• pp.236.2-237
• /
• 2003

Several studies of terbenzimidazoles and bibenzimidazoles suggested that benzimidazoles, especially 5-nitro-2-(para-methoxyphenyl)benzimidazole. possess topoisomerase I inhibition activities. In order to find out the structure activity relationship of 5-nitro-2-phenyl-benzimidazoles. eight derivatives that are substituted at the para position of 2-phenyl moiety were selected, synthesized ＆ evaluated considering their electronic or lipophilic parameters. (omitted)

• Bulletin of the Korean Chemical Society
• /
• 제31권6호
• /
• pp.1719-1722
• /
• 2010

• 대한화학회지
• /
• 제54권5호
• /
• pp.589-593
• /
• 2010

TBACl (10 mol %) 를 촉매로 사용하여 치환된benzimidazoles을 합성하는 간단하고 효율적인 합성방을 개발하였다.

• Bulletin of the Korean Chemical Society
• /
• 제30권7호
• /
• pp.1628-1630
• /
• 2009

• 대한화학회지
• /
• 제55권4호
• /
• pp.650-655
• /
• 2011

새로운 펩티드 유사체인 5a-c를 5-amino benzimidazoles 2a-c과 L-phenylalanine과의 커플링반응에 의해 합성하였다. Phenylalanine의 amine 부분을 phthalic anhydride로 보호하고, 나머지 작용기인 carboxylic acid를 염소화시켜서 hthaloyl-Lphenylalanyl chloride 4를 합성한 다음에, 화합물 2a-c와 반응시켜서 화합물 5a-c를 합성하였다. 얻어진 화합물 5a-c를 hydrazine으로 반응시켜서 새로운 펩티드 유사체인 6a-c를 합성하였으며, 얻어진 화합물에 대한 항균성을 측정하였다.

• Bulletin of the Korean Chemical Society
• /
• 제33권2호
• /
• pp.515-518
• /
• 2012

A series of substituted benzimidazoles and benzothiazoles were prepared through the one-pot reaction of ophenylenediamine and o-aminothiophenol with various aldehydes in the presence of ferric hydrogensulfate both in EtOH and water as solvent. The reactions proceed smoothly in excellent yield, high chemoselectivity and with an easy work-up.

• 대한화학회지
• /
• 제54권5호
• /
• pp.579-581
• /
• 2010

Solid silica supported ferric chloride ($SiO_2-FeCl_3$) 촉매를 이용하여 다양한 benzimidazoles의 one-step 합성을 수행하였으며, 합성 방법이 간단하며, 화합물의 분리가 용이하며, 반응시간이 짧다.