• Bulletin of the Korean Chemical Society
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• 제22권3호
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• pp.327-329
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• 2001

• Bulletin of the Korean Chemical Society
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• 제31권3호
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• pp.563-569
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• 2010

A new synthetic method of 2,5-disubstituted pyrrolidines is developed by the cyclization of unsaturated N-benzoyloxysulfonamides by $(CuOTf)_2{\cdot}C_6H_6$ in refluxing dichloroethane. Various N-4- and N-5-alkenyl and alkynyl N-benzoyloxysulfonamides are cyclized to give pyrrolidines. The cyclization proceeds via addition of sulfonamidoyl radicals to intramolecular unsaturated bonds or allylic hydrogen abstraction with the radical intermediates.

• Bulletin of the Korean Chemical Society
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• 제28권10호
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• pp.1844-1846
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• 2007

• Bulletin of the Korean Chemical Society
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• 제20권6호
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• pp.633-635
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• 1999

• 약학회지
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• 제40권3호
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• pp.300-305
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• 1996

The base-induced elimination of N-protected 2-(bromomethyl)pyrrolidines 12a-c with KHMDS in THF at -78$^{\circ}C$ for 1h gave exocyclic enamines 13a-c. The acidic catalyzed pr otonation on ${\beta}$-carbon atom of 2-(methylene)pyrrolidines 13a-c with $H_3PO_4$ formed endocyclic N-iminium intermediates 14(or 15). Nucleophilic attack of alpha-carbon atom and hydrolysis of N-iminium ion gave carbocationic adduct (aminoalcohol) 16 from which 5-amino-2-pentanones 17a-c were formed after deprotonation.

• 대한화학회지
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• 제45권6호
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• pp.549-554
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• 2001

새로운 COZ-2저해제를 개발하기 위하여 4-hydroxy L-proline의 1-위치에 arylsulfonyl기 2-위치에 arylcarboxamidyl기, 그리고 4-위치의hydroxy에 alkyl기를 도입한 새로운 후보 화합물을 합성하였다. 4-Hydroxy L-proline 1을 출발 물질로 하여 N-tosylation으로 1-위치에 4-methylphenylsulfonyl기를 도입하였고 esterification으로 carboxylic acid를 protection하였다. 4-위치의 O-alkyl-(or aralkyl)ation을 위해서 촉매로 silver oxide를 사용하여 다양한 유도체 4b-d로 전환시키는 데 성공하였다. Carboxylic acid기의 deprotection을 위해서 간편한 base-hydrolysis의 과정을 거쳐 4-alkyloxy-1-tosyl L-prolines 5b-d를 얻었다. 최종 목적 화합물인 1,2,4-치환된 pyrrolidine derivatives, 4-alkyloxy-2-phenylcarboxamidyl-1-tosyl pyrrolidines 6a-d 4종은 DCC를 사용하여 3 및 5b-d와 aniline과의 축합 반응으로 합성하였다.

• Bulletin of the Korean Chemical Society
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• 제30권11호
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• pp.2799-2802
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• 2009

• Bulletin of the Korean Chemical Society
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• 제15권10호
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• pp.825-827
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• 1994

• 대한약학회:학술대회논문집
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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• pp.178.2-178.2
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• 2003

Naturally occurring sugar mimics with a nitrogen in the ring are classified into five structural classes: polyhydroxylated pyrrolidines, piperidines, indolizidines. pyrrolizidine, and nortropanes. Glycosidase are involved in a wide range of important biological processes, such as intestinal digestion, post-translational processing of glycoproteins and the lysosomal catabolism of glycoconjugate. The realization that alkaloidal sugar mimics might have enormous therapeutic potential in many diseases such as viral infection, cancer and diabetes has led to increasing interest and demand for these compounds. (omitted)

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 2003년도 Annual Meeting of KSAP : International Symposium on Pharmaceutical and Biomedical Sciences on Obesity
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• pp.115-115
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• 2003

Naturally occurring sugar mimics with a nitrogen in the ring are classified into five structural classes: polyhydroxylated pyrrolidines, piperidines, indolizidines. pyrrolizidine, and nortropanes. Glycosidase are involved in a wide range of important biological processes, such as intestinal digestion, post-translational processing of glycoproteins and the lysosomal catabolism of glycoconjugate. The realization that alkaloidal sugar mimics might have enormous therapeutic potential in many diseases such as viral infection, cancer and diabetes has led to increasing interest and demand for these compounds. Most of these effects can be shown to result from the direct or indrect inhibition of glycosidases.