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Jung SL, Kim SG, Lee GH, Gong YD. An Efficient Solid-phase Parallel Synthesis of 2-Amino and 2-Amidobenzo[d]oxazole Derivatives via Cyclization Reactions of 2-Hydroxyphenylthiourea Resin. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.12.4109] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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2
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Kim JH, Gong YD, Lee GH, Seo JS. Solid-phase Parallel Synthesis of a Novel N-[Alkylsulfonamido-spiro(2H-1-benzopyran-2,4-piperidine)-6-yl] substituted Amide and Amine Drug-like Libraries. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.1.128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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Seo JS, Yoon CM, Gong YD. Solid-phase synthesis of sn-1,2- and sn-2,3-diacylglycerols via ring-opening of the glycidyl-bound resin. JOURNAL OF COMBINATORIAL CHEMISTRY 2007; 9:366-9. [PMID: 17373851 DOI: 10.1021/cc060139r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
A general method developed for the parallel solid-phase synthesis of sn-1,2- and sn-2,3-diacyglycerol derivatives. The technique relies on the use of carboxylic acid-promoted epoxide ring-opening reactions of the glycidyl-bound resin 3. The polymer-bound monoacylglycerol 5, formed in this manner, is transformed to the respective polymer-bound diacylglycerols 7 and 9 by reaction of the free alcohol moiety with a second carboxylic acid under conditions that lead to retention or inversion of C-2 stereochemistry. The sequence is completed by BCl3-promoted cleavage of 7 and 9 to form the sn-1,2- and sn-2,3-diacylglycerols, respectively.
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Affiliation(s)
- Jin-soo Seo
- Medicinal Science Division, Korea Research Institute of Chemical Technology, PO Box 107, Yusung-gu, Daejeon, 305-600, Korea
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4
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Hwang JY, Choi HS, Seo JS, La HJ, Yoo SE, Gong YD. Method for the solid-phase parallel synthesis of a 6-alkylamino-2-(functionalized-aminomethyl)-2H-1-benzopyran Library. ACTA ACUST UNITED AC 2007; 8:897-906. [PMID: 17096579 DOI: 10.1021/cc0600526] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A 2000-member library of benzopyran analogues was prepared by using a solid-phase synthesis protocol. Polymer-bound 6-alkylaminobenzopyrans 7 were synthesized as part of a first generation diversification step by employing reactions of a variety of alkyl halides with the amine 6. Transformations of the resin-bound intermediates 8 formed in this manner by reactions with acid halides, sulfonyl chlorides, and isocyanates leads to introduction of the second level of diversification found in the series of 6-alkylamino-2-(functionalized-aminomethyl)-2-methyl-2H-1-benzopyran analogues 11 and 12.
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Affiliation(s)
- Jong Yeon Hwang
- Medicinal Science Division, Korea Research Institute of Chemical Technology, Yusung-gu, Daejeon 305-600, Korea
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5
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Hwang JY, Gong YD. Solid-phase synthesis of the 2-aminobenzoxazole library using thioether linkage as the safety-catch linker. ACTA ACUST UNITED AC 2006; 8:297-303. [PMID: 16676998 DOI: 10.1021/cc050149c] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient solid-phase methodology has been developed for the synthesis of 2-aminobenzoxazole derivatives. The key step in this procedure involves preparation of polymer-bound 2-mercaptobenzoxazole resins 3 by reaction of the Merrifield resin with 2-aminophenols and CS(2) in the presence of DIC in MeCN. Oxidation of the resulting resins followed by treatment with amines gives the desired 2-aminobenzoxazole products 5. Further diversification can be introduced to the key resin 11, derived from the nitro group containing resin 3c. This process produces the corresponding amine, which upon reaction with acid chlorides and isocyanates can be used to generate various 6-functionalized 2-aminobenzoxazole analogues 13 and 15.
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Affiliation(s)
- Jong Yeon Hwang
- Medicinal Science Division, Korea Research Institute of Chemical Technology, Yusung, Daejon
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6
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Hwang JY, Choi HS, Lee DH, Yoo SE, Gong YD. Solid-phase synthesis of 5-amino-1-(substituted thiocarbamoyl)pyrazole and 1,2,4-triazole derivatives via dithiocarbazate linker. ACTA ACUST UNITED AC 2006; 7:136-41. [PMID: 15638493 DOI: 10.1021/cc049931n] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A general method is reported for the parallel solid-phase synthesis of 5-amino-1-(substituted thiocarbamoyl)pyrazole and 1,2,4-triazole derivatives based on the cyclization of polymer-bound dithiocarbazate 3 with various electrophiles, such as 3-ethoxyacrylonitriles 8 and cyanocarboimidates 9. The polymer-bound dithiocarbazate 3, produced by nucleophilic reaction with carbon disulfide and Fmoc-hydrazine on the Merrifield resin, served as the key intermediate for subsequent heterocycle diversification. Further nucleophilic substitution on these polymer-bound 5-amino-1-dithiocarboxypyrazoles 4 and 1,2,4-triazoles 6 with various amines under thermal cleavage condition produced the desired 5-amino-1-(substituted thiocarbamoyl)pyrazoles 5 and 1,2,4-triazoles 7. The progress of reactions could be monitored as polymer-bound intermediates by ATR-FTIR spectroscopy on single bead. The final compounds, obtained in good four-step overall yields and high purities upon cleavage from the resins, were characterized by LC/MS, 1H NMR, and 13C NMR spectroscopy.
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Affiliation(s)
- Jong Yeon Hwang
- Medicinal Science Division, Korea Research Institute of Chemical Technology, P.O. Box 107, Yusung-gu, Daejeon 305-600, Korea
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Hwang JY, Choi HS, Lee DH, Gong YD. Solid-phase synthesis of 1,3,4-oxadiazole and 1,3,4-thiadiazole derivatives via selective, reagent-based cyclization of acyldithiocarbazate resins. ACTA ACUST UNITED AC 2006; 7:816-9. [PMID: 16283790 DOI: 10.1021/cc0500957] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jong Yeon Hwang
- Medicinal Science Division, Korea Research Institute of Chemical Technology, P.O. Box 107, Yusung, Daejon, Korea
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Hwang JY, Choi HS, Seo JS, La HJ, Kim DS, Jeon HS, Jeon MK, Lee DH, Gong YD. Construction of a 2,6-Difunctionalized 2-Methyl-2H-1-benzopyran Library by Using a Solid-Phase Synthesis Protocol. J Org Chem 2005; 70:10151-4. [PMID: 16292860 DOI: 10.1021/jo051740z] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A library containing 1200 analogues of 2,6-difunctionalized 2-methyl-2H-1-benzopyran was constructed by using a solid-phase synthesis protocol. Polymer-bound 6-amido-, 6-sulfonamido-, and 6-uredo-functionalized 2-hydroxymethyl-2-methylbenzopyrans 10 were prepared as part of a first-generation diversification step by employing reactions of respective acid halides, sulfonyl chlorides, and isocyanates with the amine precursor 7. Transformations of the resin-bound intermediates 10 by reactions with alkyl and acid halides were then used to produce a diverse series of 2,6-difunctionalized 2-methyl-2H-1-benzopyran analogues 12 and 14.
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Affiliation(s)
- Jong Yeon Hwang
- Medicinal Science Division, Korea Research Institute of Chemical Technology, P.O. Box 107, Yusung-gu, Daejeon 305-600, Korea
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9
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Seo JS, Kim HW, Yoon CM, Ha DC, Gong YD. Solid-phase synthesis of hydroxypiperazine derivatives using phenethylamine linker by oxidation–Cope elimination. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.07.061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hwang JY, Choi HS, Gong YD. Solid-phase synthesis of [1,2,4]triazolo[3,4-a]phthalazine and tetrazolo[5,1-a]phthalazine derivatives. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.02.154] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Chamoulaud G, Bélanger D. Chemical modification of the surface of a sulfonated membrane by formation of a sulfonamide bond. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:4989-95. [PMID: 15984259 DOI: 10.1021/la036285l] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
This paper describes a novel approach for the surface modification of a cation-exchange membrane, bearing sulfonate groups, by a cationic layer. The modification procedure involved the chlorosulfonation of the sulfonate groups of the base membrane with thionyl chloride, followed by a reaction with a diamine to yield a sulfonamide bond and a terminal amine. The latter could be quaternized by reaction with methyl iodide or protonated by soaking in acidic media. The membranes were characterized in detail by attenuated total reflectance Fourier transform infrared and X-ray photoelectron spectroscopies as well as elemental analysis to confirm that the above reactions occurred. The selectivity of these membranes toward the electrochemically assisted transport of protons versus Zn2+ metallic cations was determined during an electrodialysis in a two-compartment electrochemical cell. The data indicate a significant decrease of the transport of the metallic cations following modification of the membrane with the cationic layer. The later allows for the transport of protons from the catholyte to the anolyte compartment with much improved selectivity since the divalent cations are excluded from the membrane due to the electrostatic barrier of the cationic layer.
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Affiliation(s)
- Gwenaël Chamoulaud
- Département de Chimie, Université du Québec à Montreal, Case Postale 8888, succursale Centre-Ville, Montréal, Québec, Canada H3C 3P8
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12
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Bräse S, Neuß B. Glossar von Begriffen der Kombinatorischen Chemie. Angew Chem Int Ed Engl 2002. [DOI: 10.1002/1521-3757(20020301)114:5<893::aid-ange893>3.0.co;2-s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Heinze K, Winterhalter U, Jannack T. Development of an easy-to-use mass spectrometric technique to monitor solid-phase reactions on polystyrene supports. Chemistry 2000; 6:4203-10. [PMID: 11128285 DOI: 10.1002/1521-3765(20001117)6:22<4203::aid-chem4203>3.0.co;2-q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
By using mass spectrometry as an analytical tool to characterise substituted, cross-linked polystyrene resins, it is possible to directly monitor the progress of the solid-phase reactions performed on these resins without prior cleavage of the resin-bound molecules. Therefore, this is a true on-resin analytical method. The mass-to-charge ratios observed in the mass spectra are readily assigned to fragments of the polymer that include the chemically bound substituents. This is the first time that the formation and breaking of bonds have been directly observed on the polymeric support. Furthermore, the relative intensities of the signals in the mass spectra provide a measure of the completeness of the reaction. Because these measurements are rapidly performed without further chemical transformations or cleavage procedures, and because only minimal amounts of material are needed, this technique could become the solid-phase equivalent of thin-layer chromatography used in classical liquid-phase chemistry.
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Affiliation(s)
- K Heinze
- Anorganisch-Chemisches Institut der Universität Heidelberg, Germany.
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Chemically sensitive high throughput parallel analysis of solid phase supported library members. JOURNAL OF COMBINATORIAL CHEMISTRY 2000; 2:243-5. [PMID: 10827930 DOI: 10.1021/cc990061x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper introduces Fourier transform infrared imaging as a powerful spectroscopic tool for the parallel identification of members of resin-supported combinatorial libraries. This technique combines the chemical specificity and high sensitivity of FTIR with the ability to rapidly analyze multiple supported resin beads simultaneously. It is shown here that the chemical identity of ligands on a variety of supported resin beads can be identified in a single experiment without destroying or otherwise perturbing the system.
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