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Kim S, Ain Bte Kamaldin N, Kang S, Kim S. Facile nucleophilic substitution of sulfonyl oxime ethers: an easy access to oxime ethers, carbonyl compounds and amines. Chem Commun (Camb) 2010; 46:7822-4. [PMID: 20852790 DOI: 10.1039/c0cc02081h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sulfonyl oxime ethers undergo facile nucleophilic substitutions with various nucleophiles to yield the corresponding oxime ethers which provide an easy access to amines and carbonyl compounds.
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Affiliation(s)
- Sundae Kim
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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2
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Chen J, Wang P, Zhu J, Wan Q, Danishefsky SJ. A program for ligation at threonine sites: application to the controlled total synthesis of glycopeptides. Tetrahedron 2010; 66:2277-2283. [PMID: 20798898 DOI: 10.1016/j.tet.2010.01.067] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A method by which to accomplish formal threonine ligation has been developed. The method accomplishes ligations of two peptide domains. We have also demonstrated the ability to successfully ligate two independent glycopeptide domains.
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Affiliation(s)
- Jin Chen
- Laboratory for Bioorganic Chemistry, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, NY 10065, USA
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4
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Lee CKY, Herlt AJ, Simpson GW, Willis AC, Easton CJ. 4-Alkoxycarbonyl- and Aminocarbonyl-Substituted Isoxazoles as Masked Acrylates and Acrylamides in the Asymmetric Synthesis of Δ2-Isoxazolines. J Org Chem 2006; 71:3221-31. [PMID: 16599621 DOI: 10.1021/jo0602569] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
4-Alkoxycarbonyl and aminocarbonyl-substituted isoxazoles undergo conjugate reduction to give delta2-isoxazolines on treatment with sodium borohydride and sodium trifluoroacetoxyborohydride, respectively. They are also alkylated at C5 through sonication with secondary and tertiary alkyl iodides in the presence of zinc dust and copper(I) iodide. These reactions are analogous to those observed with acrylates and acrylamides. The behavior is characteristic of the 4-substituted isoxazoles but not the 5-substituted regioisomers. The reductions of 4,5-disubstituted isoxazoles and the C5 alkylations of 4-substituted isoxazoles generally afford trans-4,5-disubstituted isoxazolines. Incorporating chiral auxiliaries into the alkoxycarbonyl group maintains this relative stereoselectivity. It does not provide significant levels of asymmetric induction in the reductions, but the alkylations occur with good levels of stereocontrol at both C4 and C5. Because both enantiomers of the auxiliaries are available, this provides access to either enantiomer of the products, in 93 to > or = 98% de. The methodology, therefore, provides a complementary approach to nitrile oxide cycloadditions to alkenes for the asymmetric synthesis of delta2-isoxazolines.
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Affiliation(s)
- Connie K Y Lee
- Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia
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5
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Rajesh S, Ami E, Kotake T, Kimura T, Hayashi Y, Kiso Y. An expedient synthesis of N(alpha)-protected-L-tetrahydrofuranylglycine and its application in the synthesis of novel substrate based inhibitors of HIV-1 protease. Bioorg Med Chem Lett 2002; 12:3615-7. [PMID: 12443788 DOI: 10.1016/s0960-894x(02)00781-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Z- and Fmoc-L-tetrahydrofuranylglycines have been obtained from L-vinylglycine through dipolar cycloaddition reaction, and its Fmoc derivative has been applied in the synthesis of modified S9 and S10 substrates of HIV-1 protease. These compounds mostly acted as strong inhibitors, rather than substrates, of the protease, probably due to the favourable interactions of the tetrahydrofuranylglycine moiety at the S(2) site.
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Affiliation(s)
- S Rajesh
- Department of Medicinal Chemistry, Center for Frontier Research in Medicinal Science, Kyoto Pharmaceutical University, Yamashina-ku, Japan
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Gefflaut T, Martin C, Delor S, Besse P, Veschambre H, Bolte J. Deoxysugars via microbial reduction of 5-acyl-isoxazolines: application to the synthesis of 3-deoxy-D-fructose and derivatives. J Org Chem 2001; 66:2296-301. [PMID: 11281769 DOI: 10.1021/jo001480f] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
5-Acylisoxazolines 3a-d were obtained by 1,3-dipolar cycloaddition from acetoxymethyl vinyl ketone and nitro precursors. Compounds 3a-d were biotransformed by Aspergillus niger into a 1:1 mixture of stereomers of 5-dihydroxyethyl isoxazolines (+)-4a-d (anti) and (-)-5a-d (syn). Both stereomers were obtained in good yields and with high optical purities. Carbonyl reduction by Aspergillus niger produces alcohols of R-configuration thus giving an access to D-sugar analogues: Compound (+)-4d was converted to 3-deoxy-D-erythro-hexulose and several protected derivatives. Total synthesis of 3-deoxy-D-fructose-6-phosphate was also achieved in two steps and 64% overall yield from (+)-4d.
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Affiliation(s)
- T Gefflaut
- Université Blaise Pascal, Laboratoire SEESIB, UMR 6504, 63177 Aubière Cedex, France.
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Sabat M, Johnson CR. Synthesis of unnatural amino acids via Suzuki cross-coupling of enantiopure vinyloxazolidine derivatives. Org Lett 2000; 2:1089-92. [PMID: 10804561 DOI: 10.1021/ol005645i] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[formula: see text] (R and S)-alpha-Amino alcohols and alpha-amino acids, including 4-methoxyhomophenylalanine, with a variety of unnatural side chains have been synthesized via palladium-catalyzed cross-coupling Suzuki reactions. The key building blocks 1 and 2, synthesized from the common achiral precursor 2-butene-1,4-diol, were made enantiopure utilizing a Pseudomonas cepacia lipase-catalyzed kinetic resolution. The optimal conditions for the Suzuki cross-coupling and the subsequent oxidations of the resultant alpha-amino alcohols are described.
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Affiliation(s)
- M Sabat
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202-3489, USA.
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Affiliation(s)
- Kurt V. Gothelf
- Center for Metal Catalyzed Reactions, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
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Corsaro A, Buemi G, Chiacchio U, Perrini G, Pistarà V, Romeo R. The role of the hydrogen bonding in cycloadditions of benzonitrile oxide with cyanophenols. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00359-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Synthesis of α-amino-3-chloro-4,5-dihydro-5-methyl-5-isoxazoleacetic acid, a ring-methylated analogue of the antitumor agent acivicin (AT-125). ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jlac.199519950486] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Easton CJ, Hughes CMM, Savage GP, Simpson GW. Cycloaddition Reactions of Nitrile Oxides with Alkenes. ADVANCES IN HETEROCYCLIC CHEMISTRY 1994. [DOI: 10.1016/s0065-2725(08)60184-1] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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13
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Kanemasa S, Kobayashi S. Lewis Acid Coordinated Nitrile Oxide and Nitrile Imine 1,3-Dipoles.syn-Selective Cycloadditions to 2-(1-Hydroxyalkyl)acrylates. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1993. [DOI: 10.1246/bcsj.66.2685] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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14
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Boyd EC, Paton R. Stereoselective cycloaddition of nitrile oxides to 4-vinyl-oxazolines and -oxazolidines. Tetrahedron Lett 1993. [DOI: 10.1016/s0040-4039(00)93409-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Crisp GT, Glink PT. Palladium-catalyzed heck couplings of L-vinylglycine derivatives with vinyl and aryl halides and triflates. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)88492-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Zeiss HJ. Enantioselective synthesis of L-phosphinothricin from L-methionine and L-glutamic acid via L-vinylglycine. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)80494-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Kanemasa S, Hayashi T, Yamamoto H, Wada E, Sakurai T. Asymmetric Dipolar Cycloaddition of Nitrile Oxides to the α,β-Unsaturated Esters Bearing an Imidazolidine Chiral Controller at the β-Position. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1991. [DOI: 10.1246/bcsj.64.3274] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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18
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Kanemasa S, Kobayashi S, Kobayashi S, Nishiuchi M, Yamamoto H, Wada E. Generation of nitrile oxides through O-metalation of hydroximoyl chlorides. Chelation-controlled syn-selective cycloaddition of nitrile oxides to α-substituted allyl alcohols. Tetrahedron Lett 1991. [DOI: 10.1016/0040-4039(91)80171-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Ebeling S, Matthies D, McCarthy D. THE PECULIAR α-AMIDOALKYLATION OF VINYLTRIMETHYLSILANE. PHOSPHORUS SULFUR 1991. [DOI: 10.1080/10426509108036790] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Kanemasa S, Onimura K, Wada E, Tanaka J. 22,-Dimethyl-4-phenyloxazoline and 2,2-dimethyl-4,5-diphenylimidazolidine as new chiral auxiliaries. Applications to asymmetric nitrile oxide cycloadditions. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0957-4166(00)80018-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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De Amici M, De Micheli C, Misani V. Nitrile oxides in medicinal chemistry-2. synthesis of the two enantiomers of dihydromuscimol. Tetrahedron 1990. [DOI: 10.1016/s0040-4020(01)89765-9] [Citation(s) in RCA: 64] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Meffre P, Vo-quang L, Vo-quang Y, Le Goffic F. N-(Benzyloxycarbonyl)-L-vinylglycike Methyl Ester from L-Methionine Methyl Ester Hydrochloride. SYNTHETIC COMMUN 1989. [DOI: 10.1080/00397918908052755] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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25
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Le Gall T, Lellouche JP, Toupet L, Beaucourt JP. Face selectivity during the cycloaddition reaction of nitrile oxides with iron complexed trienes. Tetrahedron Lett 1989. [DOI: 10.1016/s0040-4039(01)89010-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Fushiya S, Chiba H, Otsubo A, Nozoe S. Synthesis of (2S,3S,5S)-3-Hydroxy-5-methyl-2-pyrrolidinecarboxylic Acid, a Component of Actinomycin Z1. CHEM LETT 1987. [DOI: 10.1246/cl.1987.2229] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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27
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Caldirola P, De Amici M, De Micheli C, Wade PA, Price DT, Bereznak JF. Metal-hydride reduction of isoxazoline-3-carboxylate esters. Tetrahedron 1986. [DOI: 10.1016/s0040-4020(01)82075-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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28
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The palladium(II)-assisted syntheses of (±)α-(methylenecyclopropyl)glycine and (±)trans-α-(carboxycyclopropyl) glycine, two bioactive amino acids. Tetrahedron Lett 1985. [DOI: 10.1016/s0040-4039(00)98473-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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29
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Baldwin JE, Cha JK, Kruse LI. Total synthesis of antitumor agent at-125, (αS,5S)-α-amino-3-chloro-4,5-dihydro-5-isoxazoleacetic acid. Tetrahedron 1985. [DOI: 10.1016/s0040-4020(01)96774-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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