101
|
Rhoden CRB, Rivera DG, Kreye O, Bauer AK, Westermann B, Wessjohann LA. Rapid Access to N-Substituted Diketopiperazines by One-Pot Ugi-4CR/Deprotection+Activation/Cyclization (UDAC). ACTA ACUST UNITED AC 2009; 11:1078-82. [DOI: 10.1021/cc900106u] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cristiano R. B. Rhoden
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle (Saale), Germany, and Institute of Chemistry, University of Halle, Kurt-Mothes-Str. 2, 06120 Halle (Saale), Germany
| | - Daniel G. Rivera
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle (Saale), Germany, and Institute of Chemistry, University of Halle, Kurt-Mothes-Str. 2, 06120 Halle (Saale), Germany
| | - Oliver Kreye
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle (Saale), Germany, and Institute of Chemistry, University of Halle, Kurt-Mothes-Str. 2, 06120 Halle (Saale), Germany
| | - Anne K. Bauer
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle (Saale), Germany, and Institute of Chemistry, University of Halle, Kurt-Mothes-Str. 2, 06120 Halle (Saale), Germany
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle (Saale), Germany, and Institute of Chemistry, University of Halle, Kurt-Mothes-Str. 2, 06120 Halle (Saale), Germany
| | - Ludger A. Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle (Saale), Germany, and Institute of Chemistry, University of Halle, Kurt-Mothes-Str. 2, 06120 Halle (Saale), Germany
| |
Collapse
|
102
|
Nakhla JS, Schultz DM, Wolfe JP. Palladium-catalyzed alkene carboamination reactions for the synthesis of substituted piperazines. Tetrahedron 2009; 65:6549-6570. [PMID: 20640043 DOI: 10.1016/j.tet.2009.04.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A strategy for the stereoselective preparation of enantiomerically enriched cis-2,6-disubstituted piperazines from amino acid precursors is described. The target compounds are generated in 95-99% ee with good to excellent levels of diastereoselectivity (usually 14:1 to >20:1) using Pd-catalyzed carboamination reactions between aryl or alkenyl halides and substituted ethylenediamine derivatives to form the heterocyclic rings. The synthesis requires only 4-5 steps from commercially available amino acids, and allows for the modular construction of piperazines bearing different substituents at N(1), N(4), C(2), and C(6). The use of this strategy for the construction of 2,3-disubstituted piperazines, fused bicyclic piperazines, and tetrahydroquinoxalines is also reported. In addition, the mechanism of the key carboamination reactions are discussed, and new models that predict and explain the stereochemical outcome of these transformations are presented.
Collapse
Affiliation(s)
- Josephine S Nakhla
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055
| | | | | |
Collapse
|
103
|
Crestey F, Witt M, Jaroszewski JW, Franzyk H. Expedite Protocol for Construction of Chiral Regioselectively N-Protected Monosubstituted Piperazine, 1,4-Diazepane, and 1,4-Diazocane Building Blocks. J Org Chem 2009; 74:5652-5. [DOI: 10.1021/jo900441s] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- François Crestey
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Matthias Witt
- Bruker Daltonik GmbH, Fahrenheitstrasse 4, D-28359 Bremen, Germany
| | - Jerzy W. Jaroszewski
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Henrik Franzyk
- Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| |
Collapse
|
104
|
Farran D, Echalier D, Martinez J, Dewynter G. Regioselective and sequential reactivity of activated 2,5-diketopiperazines. J Pept Sci 2009; 15:474-8. [DOI: 10.1002/psc.1139] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
105
|
Murugavel S, Selvakumar R, Govindarajan S, Kannan PS, Subbiahpandi A. Piperazinediium dioxamate. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o1004. [PMID: 21583829 PMCID: PMC2977693 DOI: 10.1107/s1600536809012513] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Accepted: 04/02/2009] [Indexed: 11/29/2022]
Abstract
The title compound, C4H12N22+·2C2H2NO3−, contains a network of doubly protanated piperazinium cations (lying about centres of inversion) and dioxamate anions. The piperazinium dication adopts a typical chair conformation. The crystal structure is stabilized by cation–to–anion N—H⋯O and anion–to–anion N—H⋯O hydrogen bonds.
Collapse
|
106
|
|
107
|
Scott WL, Alsina J, Audu CO, Babaev E, Cook L, Dage JL, Goodwin LA, Martynow JG, Matosiuk D, Royo M, Smith JG, Strong AT, Wickizer K, Woerly EM, Zhou Z, O'Donnell MJ. Distributed Drug Discovery, Part 2: global rehearsal of alkylating agents for the synthesis of resin-bound unnatural amino acids and virtual D(3) catalog construction. ACTA ACUST UNITED AC 2009; 11:14-33. [PMID: 19105725 PMCID: PMC2651687 DOI: 10.1021/cc800184v] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
![]()
Distributed Drug Discovery (D3) proposes solving large drug discovery problems by breaking them into smaller units for processing at multiple sites. A key component of the synthetic and computational stages of D3 is the global rehearsal of prospective reagents and their subsequent use in the creation of virtual catalogs of molecules accessible by simple, inexpensive combinatorial chemistry. The first section of this article documents the feasibility of the synthetic component of Distributed Drug Discovery. Twenty-four alkylating agents were rehearsed in the United States, Poland, Russia, and Spain, for their utility in the synthesis of resin-bound unnatural amino acids 1, key intermediates in many combinatorial chemistry procedures. This global reagent rehearsal, coupled to virtual library generation, increases the likelihood that any member of that virtual library can be made. It facilitates the realistic integration of worldwide virtual D3 catalog computational analysis with synthesis. The second part of this article describes the creation of the first virtual D3 catalog. It reports the enumeration of 24 416 acylated unnatural amino acids 5, assembled from lists of either rehearsed or well-precedented alkylating and acylating reagents, and describes how the resulting catalog can be freely accessed, searched, and downloaded by the scientific community.
Collapse
Affiliation(s)
- William L Scott
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University, Indianapolis, Indiana 46202-3274, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
108
|
Gellerman G, Hazan E, Kovaliov M, Albeck A, Shatzmiler S. Synthesis of orthogonally protected optically pure ketopiperazine, diketopiperazine, ketodiazepane, and 3-aminopyrrolidone building blocks for peptidomimetic combinatorial chemistry. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.12.046] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
109
|
Scott WL, O'Donnell MJ. Distributed Drug Discovery, Part 1: linking academia and combinatorial chemistry to find drug leads for developing world diseases. JOURNAL OF COMBINATORIAL CHEMISTRY 2009; 11:3-13. [PMID: 19105724 PMCID: PMC2651689 DOI: 10.1021/cc800183m] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2008] [Indexed: 02/08/2023]
Affiliation(s)
- William L Scott
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202-3274, USA.
| | | |
Collapse
|
110
|
Peng J, Clive DLJ. Asymmetric Synthesis of the ABC-Ring System of the Antitumor Antibiotic MPC1001. J Org Chem 2008; 74:513-9. [DOI: 10.1021/jo802344t] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jianbiao Peng
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Derrick L. J. Clive
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| |
Collapse
|
111
|
Vinaya K, Naveen S, Ananda Kumar CS, Benakaprasad SB, Sridhar MA, Shashidhara Prasad J, Rangappa KS. Synthesis, characterization, crystal and molecular structure analysis of a novel 1-benzhydryl piperazine derivative: 1-benzhydryl-4-(2-nitro-benzenesulfonyl)-piperazine. Struct Chem 2008. [DOI: 10.1007/s11224-008-9361-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
112
|
Fytas C, Zoidis G, Fytas G. A facile and effective synthesis of lipophilic 2,6-diketopiperazine analogues. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.05.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
113
|
Tetrahedron reports on organic chemistry. Tetrahedron 2008. [DOI: 10.1016/s0040-4020(08)00897-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
114
|
Deveau AM, Costa NE, Joshi EM, Macdonald TL. Synthesis of diketopiperazine-based carboline homodimers and in vitro growth inhibition of human carcinomas. Bioorg Med Chem Lett 2008; 18:3522-5. [DOI: 10.1016/j.bmcl.2008.05.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2008] [Revised: 05/03/2008] [Accepted: 05/06/2008] [Indexed: 11/29/2022]
|
115
|
Borthakur M, Barthakur MG, Boruah RC. Microwave promoted one-pot synthesis of novel A-ring fused steroidal dehydropiperazines. Steroids 2008; 73:539-42. [PMID: 18291431 DOI: 10.1016/j.steroids.2008.01.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2007] [Revised: 12/28/2007] [Accepted: 01/09/2008] [Indexed: 11/30/2022]
Abstract
The preparation of ring-A fused steroidal dehydropiperazine at the 3,4-position is herein described. The novel steroidal dehydropiperazines were prepared from the annulation reaction of ethylenediamine with 3-keto-4-en steroids in a one-pot reaction under microwave irradiation. The key step involves base catalysed aerial oxidation of the C-6 methylene group followed by cyclocondensation of ethylenediamine via Michael addition reaction.
Collapse
Affiliation(s)
- Moyurima Borthakur
- Medicinal Chemistry Division, North-East Institute of Science and Technology, Jorhat-785006, India
| | | | | |
Collapse
|
116
|
Fryszkowska A, Ostaszewski R. Studies towards the synthesis of bicyclomycin precursors: Synthesis ofN,N′-disubstituted 2,5-diketopiperazines in solution and on solid phase. J Heterocycl Chem 2008. [DOI: 10.1002/jhet.5570450321] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
117
|
Facile Synthesis of Orthogonally Protected Optically Pure Keto- and Diketopiperazine Building Blocks for Combinatorial Chemistry. Int J Pept Res Ther 2008. [DOI: 10.1007/s10989-008-9129-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
118
|
Pichowicz M, Simpkins NS, Blake AJ, Wilson C. Studies towards complex bridged alkaloids: regio- and stereocontrolled enolate chemistry of 2,5-diketopiperazines. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.02.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
119
|
Huang ZZ, Leman L, Ghadiri M. Biomimetic Catalysis of Diketopiperazine and Dipeptide Syntheses. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704266] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
120
|
A convergent synthesis of enantiopure bicyclic scaffolds through multicomponent Ugi reaction. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.10.058] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
121
|
Girisha HR, Naveen S, Vinaya K, Sridhar MA, Shashidhara Prasad J, Rangappa KS. 1-Benzhydryl-4-(4-chloro-phenyl-sulfonyl)piperazine. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o358. [PMID: 21201390 PMCID: PMC2960354 DOI: 10.1107/s1600536807067888] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2007] [Accepted: 12/20/2007] [Indexed: 11/10/2022]
Abstract
The title compound, C(23)H(23)ClN(2)O(2)S, was synthesized by the nucleophilic substitution of 1-benzhydrylpiperazine with 4-chloro-phenyl-sulfonyl chloride. The piperazine ring is in a chair conformation. The geometry around the S atom is that of a distorted tetra-hedron. There is a large range of bond angles around the piperazine N atoms. The dihedral angle between the least-squares plane (p1) defined by the four coplanar C atoms of the piperazine ring and the benzene ring is 81.6 (1)°. The dihedral angles between p1 and the phenyl rings are 76.2 (1) and 72.9 (2)°. The two phenyl rings make a dihedral angle of 65.9 (1)°. Intramolecular C-H⋯O hydrogen bonds are present.
Collapse
|
122
|
Huang ZZ, Leman LJ, Ghadiri MR. Biomimetic catalysis of diketopiperazine and dipeptide syntheses. Angew Chem Int Ed Engl 2008; 47:1758-61. [PMID: 18213666 PMCID: PMC2585744 DOI: 10.1002/anie.200704266] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Entry for the Table of Contents Modular, supramolecular catalysts based on the coiled coil peptide scaffold and designed to mimic nonribosomal peptide synthetases are demonstrated to catalyze the formation of diketopiperazine and linear dipeptides for several aminoacyl substrates. We further demonstrate that the nature of the active site residues in the peptide catalysts can be used to effect directed intermodular aminoacyl transfer processes and govern the relative yields of diketopiperazine, linear dipeptide, and hydrolyzed substrate.
Collapse
Affiliation(s)
- Zheng-Zheng Huang
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | | | | |
Collapse
|
123
|
Synthesis and Conformational Study of Ser and Cys Derivatives of N-Hydroxy Diketopiperazine. B KOREAN CHEM SOC 2007. [DOI: 10.5012/bkcs.2007.28.12.2414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
124
|
Öztürk G, Gümgüm B, Kizil M, Emen S. Solvent-Free Synthesis of Nitrilotriacetamide and Diketopiperazines from Nitrilotriacetic Acid under Microwave Irradiation and Their Antimicrobial Activity. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397910701572795] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
125
|
Transannular Rearrangement of Activated Lactams: Stereoselective Synthesis of Substituted Pyrrolidine-2,4-diones from Diketopiperazines. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200702132] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
126
|
Farran D, Parrot I, Martinez J, Dewynter G. Transannular Rearrangement of Activated Lactams: Stereoselective Synthesis of Substituted Pyrrolidine-2,4-diones from Diketopiperazines. Angew Chem Int Ed Engl 2007; 46:7488-90. [PMID: 17722139 DOI: 10.1002/anie.200702132] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Daniel Farran
- Institut des Biomolécules Max Mousseron, UMR 5247, Université Montpellier, 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
| | | | | | | |
Collapse
|
127
|
Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)01371-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
128
|
Abstract
We have developed second-generation monomers 1 and 2 and improved conditions for rapidly and simultaneously closing multiple diketopiperazines on solid support. These new conditions involve either the microwave heating of a suspension of solid-supported amino-tetrafluoropropyl esters in acetic acid/triethylamine catalyst solution or continuous flow of catalyst solution through the resin, heated in a flow cell apparatus. We demonstrate that the new monomers 1 and 2 can be combined with the new conditions easily to synthesize previously inaccessible hetero and homo spiro ladder oligomers 3 and 4 and others.
Collapse
Affiliation(s)
- Sharad Gupta
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | | | | |
Collapse
|
129
|
Synthesis, characterization and metal chelating properties of silica-physisorbed and chemisorbed-2,5-dioxypiperazine. Polyhedron 2007. [DOI: 10.1016/j.poly.2007.04.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
130
|
Fedorovich IS, Ganushchak NI, Karpyak VV, Obushchak ND, Lesyuk AI. Thioamides from 5-arylfurfural and monosubstituted piperazine derivatives (Wilgerodt-Kindler reaction). RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2007. [DOI: 10.1134/s1070428007080180] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
131
|
Nakhla JS, Wolfe JP. A concise asymmetric synthesis of cis-2,6-disubstituted N-aryl piperazines via Pd-catalyzed carboamination reactions. Org Lett 2007; 9:3279-82. [PMID: 17650007 PMCID: PMC2730114 DOI: 10.1021/ol071241f] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise, modular, asymmetric synthesis of cis-2,6-disubstituted piperazines from readily available amino acid precursors is described. The key step in the synthesis is a Pd-catalyzed carboamination of a N1-aryl-N2-allyl-1,2-diamine with an aryl bromide. The products are obtained in 14-20:1 dr, with >97% ee, and the key cyclizations are the first examples of six-membered ring formation via Pd-catalyzed carboamination reactions of unsaturated amines with aryl halides.
Collapse
Affiliation(s)
- Josephine S Nakhla
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, USA
| | | |
Collapse
|
132
|
Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)00834-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
133
|
Clark RB, Elbaum D. An orthogonal protection strategy for the synthesis of 2-substituted piperazines. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.01.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
134
|
Studies on the reduction and reductive alkylation of amino acid-derived spirocyclic 2,6-dioxopiperazines. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.01.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
135
|
Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)00205-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
136
|
Tullberg M, Luthman K, Grøtli M. Microwave-assisted solid-phase synthesis of 2,5-diketopiperazines: solvent and resin dependence. ACTA ACUST UNITED AC 2007; 8:915-22. [PMID: 17096581 DOI: 10.1021/cc0600876] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Solid-phase synthesis of diketopiperazines (DKPs) was preformed using various combinations of resins (polystyrene, TentaGel, ArgoGel, and PEGA) and solvents (toluene, tert-butyl alcohol, water, and toluene/2-butanol (1:4, v/v). The DKPs were synthesized from solid-phase bound dipeptides via intramolecular aminolysis. Both thermal and microwave-assisted solid-phase synthesis of DKPs gave high yields of products independently of resin and organic solvent used; however, only the PEGA resin resulted in high yields of DKPs in water independent of heating method. The short reaction times, high yields, and the possibility to run reactions in water when an appropriate resin is used makes the microwave-assisted solid-phase synthesis the method of choice. The method should be suitable for solid-phase synthesis of diketopiperazine-based libraries.
Collapse
Affiliation(s)
- Marcus Tullberg
- Department of Chemistry, Medicinal Chemistry, Göteborg University, SE-412 96 Göteborg, Sweden
| | | | | |
Collapse
|
137
|
Nordstrøm LU, Madsen R. Iridium catalysed synthesis of piperazines from diols. Chem Commun (Camb) 2007:5034-6. [DOI: 10.1039/b712685a] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
138
|
Lectka T, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2006. [DOI: 10.1016/s0040-4020(06)01801-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
139
|
Viso A, de la Pradilla RF, Flores A. Highly diastereoselective Staudinger reaction on 5,6-dihydropyrazin-2-(1H)-ones. Synthesis of enantiopure fused oxopiperazino-β-lactams. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.10.044] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
140
|
Lena G, Lallemand E, Gruner AC, Boeglin J, Roussel S, Schaffner AP, Aubry A, Franetich JF, Mazier D, Landau I, Briand JP, Didierjean C, Rénia L, Guichard G. 1,3,5-Triazepan-2,6-diones as Structurally Diverse and Conformationally Constrained Dipeptide Mimetics: Identification of Malaria Liver Stage Inhibitors from a Small Pilot Library. Chemistry 2006; 12:8498-512. [PMID: 16927352 DOI: 10.1002/chem.200600560] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The development of the 1,3,5-triazepane-2,6-dione system as a novel, conformationally restricted, and readily accessible class of dipeptidomimetics is reported. The synthesis of the densely functionalized 1,3,5-triazepane-2,6-dione skeleton was achieved in only four steps from a variety of simple linear dipeptide precursors. To extend the practical value of 1,3,5-triazepane-2,6-diones, a general polymer-assisted solution-phase synthesis approach amenable to library production in a multiparallel format was developed. The conformational preferences of the 1,3,5-triazepane-2,6-dione skeleton were investigated in detail by NMR spectroscopy and X-ray diffraction. The ring exhibits a characteristic folded conformation which was compared to that of related dipeptide-derived scaffolds including the more planar 2,5-diketopiperazine (DKP). Molecular and structural diversity was increased further through post-cyclization appending operations at urea nitrogens. Preliminary biological screens of a small collection of 1,3,5-triazepane-2,6-diones revealed inhibitors of the underexplored malaria liver stage and suggest strong potential for this dipeptide-derived scaffold to interfere with and to modulate biological pathways.
Collapse
Affiliation(s)
- Gersande Lena
- Immunologie et Chimie Thérapeutiques (ICT), UPR CNRS 9021, Institut de Biologie Moléculaire et Cellulaire, 15 rue Descartes, 67084 Strasbourg, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
141
|
Pichowicz M, Simpkins NS, Blake AJ, Wilson C. Synthesis towards complex bridged alkaloids derived from diketopiperazines: a cationic cascade approach to stephacidins, paraherquamides and related systems. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.09.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
142
|
Dandapani S, Lan P, Beeler AB, Beischel S, Abbas A, Roth BL, Porco JA, Panek JS. Convergent Synthesis of Complex Diketopiperazines Derived from Pipecolic Acid Scaffolds and Parallel Screening against GPCR Targets. J Org Chem 2006; 71:8934-45. [PMID: 17081025 DOI: 10.1021/jo061758p] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convergent approach to highly functionalized diketopiperazines (DKPs) using enantioenriched pipecolic acids is described. Scandium triflate-catalyzed [4 + 2] aza-annulation was employed to produce stereochemically well-defined building blocks. A resin "catch and release" strategy was devised to convert annulation products to pipecolic acid monomers. Complex diketopiperazines were efficiently assembled utilizing one-pot cyclodimerization of pipecolic acids. Massively parallel screening of the complex DKPs against a panel of molecular targets identified novel ligands for a number of G-protein-coupled receptors (GPCRs).
Collapse
Affiliation(s)
- Sivaraman Dandapani
- Department of Chemistry and Center for Chemical Methodology and Library Development (CMLD-BU), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, USA
| | | | | | | | | | | | | | | |
Collapse
|
143
|
Durow AC, Long GC, O'Connell SJ, Willis CL. Total Synthesis of the Chlorinated Marine Natural Product Dysamide B. Org Lett 2006; 8:5401-4. [PMID: 17078728 DOI: 10.1021/ol062279f] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[Structure: see text] Two approaches to the synthesis of (2S,4S)-5,5-dichloroleucine are compared, and the parent amino acid was used in the first total synthesis of the polychlorinated marine natural product, dysamide B. A key step was the lead tetraacetate-mediated decarboxylation of an alpha,alpha-dichloro acid in the presence of 1,4-cyclohexadiene to generate the dichloromethyl group.
Collapse
Affiliation(s)
- Amanda C Durow
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK
| | | | | | | |
Collapse
|
144
|
Cain JP, Mayorov AV, Cai M, Wang H, Tan B, Chandler K, Lee Y, Petrov RR, Trivedi D, Hruby VJ. Design, synthesis, and biological evaluation of a new class of small molecule peptide mimetics targeting the melanocortin receptors. Bioorg Med Chem Lett 2006; 16:5462-7. [PMID: 16931008 PMCID: PMC1810397 DOI: 10.1016/j.bmcl.2006.07.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2006] [Revised: 06/23/2006] [Accepted: 07/05/2006] [Indexed: 10/24/2022]
Abstract
A new bicyclic template has been developed for the synthesis of peptide mimetics. Straightforward synthetic steps, starting from amino acids, allow the facile construction of a wide range of analogs. This system was designed to target the melanocortin receptors (MCRs), with functional group selection based on a known pharmacophore and guidance from molecular modeling to rationally identify positional and stereochemical isomers likely to be active. The functions of hMCRs are critical to myriad biological activities, including pigmentation, steroidogenesis, energy homeostasis, erectile activity, and inflammation. These G-protein-coupled receptors (GPCRs) are targets for drug discovery in a number of areas, including cancer, pain, and obesity therapeutics. All compounds from this series tested to date are antagonists which bind with high affinity. Importantly, many are highly selective for a particular MCR subtype, including some of the first completely hMC5R-selective antagonists reported.
Collapse
Affiliation(s)
- James P Cain
- Department of Chemistry, University of Arizona, Tucson, AZ 85721, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
145
|
Hendea D, Laschat S, Baro A, Frey W. Diastereoselective Alkylation of a Proline-Derived Bicyclic Lactim Ether. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690181] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
146
|
|
147
|
Lectka T, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2006. [DOI: 10.1016/s0040-4020(06)00771-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
148
|
Dömling A. Recent developments in isocyanide based multicomponent reactions in applied chemistry. Chem Rev 2006; 106:17-89. [PMID: 16402771 DOI: 10.1021/cr0505728] [Citation(s) in RCA: 3390] [Impact Index Per Article: 188.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
149
|
Belen’kii L, Gramenitskaya V, Evdokimenkova Y. The Literature of Heterocyclic Chemistry, Part IX, 2002–2004. ADVANCES IN HETEROCYCLIC CHEMISTRY 2006. [DOI: 10.1016/s0065-2725(06)92004-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
150
|
Mihala N, Csámpai A, Ilas J, Kikelj D, Kiss R, Süli-Vargha H. The synthesis of alternative diketopiperazines as potential RGD mimetics. J Pept Sci 2006; 12:663-9. [PMID: 16835887 DOI: 10.1002/psc.776] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Alternative RGD mimetics-with the exception of glycine-c(Arg-Asp) 1, c(Arg-Glu) 2 and c[Arg-Asp(Phe-OH)] 3 were synthesized. The DKPs were prepared on solid phase with orthogonal protection allowing further derivatization in solution. During solution phase cyclization in NH(3)/methanol, the side chain benzyl ester group of H-Arg(Tos)-Asp(OBzl)-OMe and H-Arg(Tos)-Glu(OBzl)-OMe suffer transesterification, while beta-t-butyl or beta-cyclohexyl esters are stable under the same conditions. In spite of the simple structure, all compounds bind selectively to the alpha(v)beta(3) integrin receptor, 3 showing the highest affinity with an IC(50) value of 0.74 microM value. On the other hand only 3 binds with measurable activity to the alpha(IIb)beta(3) receptor (IC(50) 159 microM). The binding affinities seem to be in accordance with the distances between the arginine guanidino and the aspartic acid carboxyl group in extended conformation determined by semiempirical geometry optimization.
Collapse
Affiliation(s)
- Nikolett Mihala
- Research Group for Peptide Chemistry, Hungarian Academy of Sciences, Eötvös Loránd University, Budapest, Hungary
| | | | | | | | | | | |
Collapse
|