Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Seung Whan Ko"'
Autor:
Heesung Eum, Keun Woo Lee, Yuno Lee, Hyun Joon Ha, Songmi Kim, Won Koo Lee, Minky Son, Sae Young Yun, Ayoung Baek, Seung Whan Ko, Sunghoon Kim
Publikováno v:
Bulletin of the Korean Chemical Society. 31:611-614
Substituted imidazolidin-2-ones deduced as potential inhibitors of IleRS by docking simulations were synthesized from an aziridine-2-carboxaldehyde. Reductive amination of an aziridine-2-carboxaldehyde with dipeptides for the sub- stituents at N1 and
Publikováno v:
Supramolecular Chemistry. 19:167-173
Calix[6]arene formed an endo-complex with piperidine and its inclusion properties were investigated by NMR spectroscopy and X-ray crystallography. Especially, the DOSY spectrum showed that piperidine formed a unique complex with calix[6]arene.
Publikováno v:
Bulletin of the Korean Chemical Society. 27:1227-1230
Numerous attempts have been made to design new host systems which can selectively interact the target guest and perform intriguing molecular recognition processes. The selective recognition of many important biogenic amines is one of the fundamental
Publikováno v:
Bioorganic & Medicinal Chemistry Letters. 16:1880-1883
Constrained ceramide analogs were designed and synthesized by binding terminal alcohol and amine of ceramide with additional carbonyl functional group as 3-acetyl (3), 3-propionyl (4), 3-benzoyl (5), and 3-hexadecanoyl-4-(1-hydroxyhexadec-2-enyl)-oxa
Publikováno v:
Electroanalysis. 16:472-477
Five bisbridged calix[6]crowns have been investigated as Cs+ ionophore in PVC membrane electrodes. As ionophores, three 1,3-bisbridged calix[6]crown-4-ethers(I–III), 1,3-bisbridged calix[6]crown-5-ether(IV), and 1,3-bisbridged calix[6]crown-6-ether
Publikováno v:
Supramolecular Chemistry. 15:117-125
Publikováno v:
Journal of Inclusion Phenomena and Macrocyclic Chemistry. 40:285-289
Several quadruply bridged calix[6]arenes were prepared in high yield by the reaction of various 1,4-di-O-alkylated calix[6]arenes with 1,2,4,5-tetrakis-(bromomethyl)benzene in the presence of Cs2CO3. The alkali metal extraction study established that
Publikováno v:
Bulletin of the Korean Chemical Society. 29:211-213
Calixcrowns are macromolecular hybrid structures composed of calix[n]arenes and crown ethers which have been demonstrated to be very effective complexing agents for alkali and other metal ions. In particular, calix[4]arene crown-6 hosts have been ext
Autor:
Hyun-Joon Ha, Hyo Jae Yoon, Yongeun Kim, Min Sung Kim, Seung Whan Ko, Won Koo Lee, Kyusung Han, Hoseop Yun
Publikováno v:
Tetrahedron Letters. 46:4407-4409
Ring opening reaction of an enantiomerically pure aziridine-2-carboxylate with an azide nucleophile under aqueous acidic media proceeded efficiently and stereoselectively to give 3-amino-2-azidopropionate which is converted to orthogonally protected
Autor:
Seung Whan Ko, Wonku Lee, Young Hwan Ha, Hyun Joon Ha, Sun Young Jang, Won Koo Lee, Sunghoon Kim, Yong Woo Kim, Jongkook Lee
Publikováno v:
Bioorganic & Medicinal Chemistry Letters. 14:3881-3883
A series of 4-arylpiperazin-1-yl-3-phenyloxazolidin-2-one derivatives with diversification of the N-substituents such as methylene O-linked heterocycles, thioamide, dithiocarbamate, thiourea, and thiocarbamate were synthesized and evaluated as antiba