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Li B, Duan B, Li J, Zhang M, Yuan Y, Ding Y, Hu A. An acyclic enediyne anticancer compound attributed to a Bergman cyclization at physiological temperature. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.08.042] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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2
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Mahy W, Cabezas-Hayes S, Kociok-Köhn G, Frost CG. A Highly Regioselective Palladium-Catalyzed O,S Rearrangement of Cyclic Thiocarbonates. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- William Mahy
- Department of Chemistry; University of Bath; BA2 7AY Bath UK
| | | | - Gabriele Kociok-Köhn
- Chemical Characterisation and Analysis Facility; University of Bath; BA2 7AY Bath UK
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Melikyan GG, Voorhees E, Sepanian R. Radical Reactions of the Cobalt-Complexed Propargyl Acetals: Inter- and Intramolecular Variants. Organometallics 2013. [DOI: 10.1021/om400718w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gagik G. Melikyan
- Department of Chemistry and
Biochemistry, California State University Northridge, Northridge, California 91330-8262, United States
| | - Erin Voorhees
- Department of Chemistry and
Biochemistry, California State University Northridge, Northridge, California 91330-8262, United States
| | - Ruth Sepanian
- Department of Chemistry and
Biochemistry, California State University Northridge, Northridge, California 91330-8262, United States
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Melikyan GG, Rivas B, Harutyunyan S, Carlson L, Sepanian R. Cobaltocene-Induced Low-Temperature Radical Coupling Reactions in a Cobalt–Alkyne Series. Organometallics 2012. [DOI: 10.1021/om2006497] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gagik G. Melikyan
- Department of Chemistry
and Biochemistry, California State University Northridge, Northridge, California 91330-8262, United
States
| | - Bianca Rivas
- Department of Chemistry
and Biochemistry, California State University Northridge, Northridge, California 91330-8262, United
States
| | - Stepan Harutyunyan
- Department of Chemistry
and Biochemistry, California State University Northridge, Northridge, California 91330-8262, United
States
| | - Louis Carlson
- Department of Chemistry
and Biochemistry, California State University Northridge, Northridge, California 91330-8262, United
States
| | - Ruth Sepanian
- Department of Chemistry
and Biochemistry, California State University Northridge, Northridge, California 91330-8262, United
States
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5
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Carbon tether rigidity as a stereochemical tool directing intramolecular radical cyclizations. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.02.117] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Clark AE, Bhattacharryya S, Zaleski JM. Density Functional Analysis of Ancillary Ligand Electronic Contributions to Metal-Mediated Enediyne Cyclization. Inorg Chem 2008; 48:3926-33. [DOI: 10.1021/ic801117m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aurora E. Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, and Department of Chemistry, Indiana University, Bloomington, Indiana 47405
| | - Sibaprasad Bhattacharryya
- Department of Chemistry, Washington State University, Pullman, Washington 99164, and Department of Chemistry, Indiana University, Bloomington, Indiana 47405
| | - Jeffrey M. Zaleski
- Department of Chemistry, Washington State University, Pullman, Washington 99164, and Department of Chemistry, Indiana University, Bloomington, Indiana 47405
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Melikyan GG, Wild C, Toure P. Intramolecular Cyclizations of Co2(CO)6-Complexed Propargyl Radicals: Synthesis of d,l- and meso-1,5-Cyclodecadiynes. Organometallics 2008. [DOI: 10.1021/om7010497] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gagik G. Melikyan
- Department of Chemistry and Biochemistry, California State University Northridge, Northridge, California 91330-8262
| | - Christopher Wild
- Department of Chemistry and Biochemistry, California State University Northridge, Northridge, California 91330-8262
| | - Pogban Toure
- Department of Chemistry and Biochemistry, California State University Northridge, Northridge, California 91330-8262
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8
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Inoue M, Ohashi I, Kawaguchi T, Hirama M. Total Synthesis of the C-1027 Chromophore Core: Extremely Facile Enediyne Formation through SmI2-Mediated 1,2-Elimination. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704842] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Inoue M, Ohashi I, Kawaguchi T, Hirama M. Total Synthesis of the C-1027 Chromophore Core: Extremely Facile Enediyne Formation through SmI2-Mediated 1,2-Elimination. Angew Chem Int Ed Engl 2008; 47:1777-9. [DOI: 10.1002/anie.200704842] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Poloukhtine A, Popik VV. Application of photochemical decarbonylation of cyclopropenones for the in situ generation of reactive enediynes. Construction of a cyclopropenone-containing enediyne precursor by using a cyclopropenone acetal building block. J Org Chem 2005; 70:1297-305. [PMID: 15704964 DOI: 10.1021/jo048065y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A cyclopropenone-containing enediyne photoprecursor, 6-tert-butyldimethylsilyloxy-3-(alpha-hydroxybenzyl)bicyclo[8.1.0]undeca-1(10),2-diene-4-yn-11-one (1), was prepared in 10 steps by sequential modification of the cyclopropenone 2,2-dimethyl-1,3-propanediyl acetal (5). The crucial cyclization step was achieved under Nozaki conditions, while the endocylic double bond has been introduced by the allylic rearrangement. UV irradiation of the cyclopropenone 1 results in efficient decarbonylation and the formation of the reactive enediyne 2. The latter undergoes Bergman cycloaromatization with a half-life of 12 h at 40 degrees C and in the presence of 1,4-dihydrobenzene quantitatively produces corresponding tetralin 29.
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Affiliation(s)
- Andrei Poloukhtine
- Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, USA
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11
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12
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Feldgus S, Shields GC. An ONIOM study of the Bergman reaction: a computationally efficient and accurate method for modeling the enediyne anticancer antibiotics. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)01064-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
Cyclamenol A is one of the very few non-carbohydrate and non-peptide natural products that inhibit leukocyte adhesion to endothelial cells. We report on the first enantioselective total synthesis of the (9S, 18R)-diastereomer of this macrocyclic polyene lactam. Key elements of the synthesis are i) the synthesis of the required chiral building blocks by employing readily accessible building blocks from the chiral pool, that is, (S)-malic acid and (R)-hydroxyisobutyric acid, ii) assembly of a linear polyene precursor by means of Wittig and Horner olefination reactions as key C-C bond-forming transformations, iii) ring closure by means of a vanadium-mediated pinacolisation reaction and iv) conversion of the generated cis-diol into a (Z)-olefin to complete the entire polyene system of the natural product. Attempts to close the macrocyclic ring by a macrolactamisation, a double Stille coupling or direct olefination in a McMurry reaction failed. Crucial to the successful completion of the synthesis was the correct orchestration of the final steps. It was necessary to first deprotect the intermediate formed after macrocycle formation and to generate the sensitive heptaene system in the last step by means of a Corey-Hopkins sequence.
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Affiliation(s)
- M Nazaré
- Aventis Pharma, Medicinal Chemistry G838, Frankfurt, Germany
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14
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Jones GB, Warner PM. Electronic control of the Bergman cyclization: the remarkable role of vinyl substitution. J Am Chem Soc 2001; 123:2134-45. [PMID: 11456858 DOI: 10.1021/ja0033032] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report an ab initio study of the effect of vinyl substitution on the cycloaromatization of 3-ene-1,5-diynes (the Bergman cyclization). The majority of the calculations were conducted by using the BLYP version of Density Functional Theory, and higher level Brueckner orbital calculations were used for a few key compounds. In all, 46 enediynes, 44 cyclization transition states, 39 singlet p-benzynes, and 28 related triplet p-benzynes were studied, including simple vinyl-substituted and annulated examples. The data indicate that strongly electron-withdrawing groups increase the cyclization barrier, while sigma-donating groups decrease it; pi conjugation, especially donation, has little effect. Most annulations, including those involving heteroaromatic rings, lower the barrier slightly (6 MR) or raise it slightly (5 MR). Larger effects are seen for smaller rings or charged rings. Some previously observed apparent rate inhibitions are seen to be due to reversibility or forward reactivity of the intermediate p-benzynes, which are thereby inhibited from the H abstraction step that completes cycloaromatization. H abstraction reactivity, as judged from the p-benzyne singlet-triplet energy gap and from isodesmic equations, is also examined. Unexpected behavior is predicted for some heteroaromatic systems. Finally, we anticipate how these results may be applied to the design of prodrug candidates for subsequent biological application.
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Affiliation(s)
- G B Jones
- Contribution from the Bioorganic, Medicinal Chemistry, and Molecular Engineering Laboratories, Department of Chemistry, Northeastern University, 360 Huntington Ave., Boston, Massachusetts 02115, USA
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Jones GB, Wright JM, Plourde GW, Hynd G, Huber RS, Mathews JE. A Direct and Stereocontrolled Route to Conjugated Enediynes. J Am Chem Soc 2000. [DOI: 10.1021/ja993766b] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Graham B. Jones
- Contribution from the Bioorganic and Medicinal Chemistry Laboratories, Department of Chemistry, Northeastern University, Boston, Massachusetts 02115
| | - Justin M. Wright
- Contribution from the Bioorganic and Medicinal Chemistry Laboratories, Department of Chemistry, Northeastern University, Boston, Massachusetts 02115
| | - Gary W. Plourde
- Contribution from the Bioorganic and Medicinal Chemistry Laboratories, Department of Chemistry, Northeastern University, Boston, Massachusetts 02115
| | - George Hynd
- Contribution from the Bioorganic and Medicinal Chemistry Laboratories, Department of Chemistry, Northeastern University, Boston, Massachusetts 02115
| | - Robert S. Huber
- Contribution from the Bioorganic and Medicinal Chemistry Laboratories, Department of Chemistry, Northeastern University, Boston, Massachusetts 02115
| | - Jude E. Mathews
- Contribution from the Bioorganic and Medicinal Chemistry Laboratories, Department of Chemistry, Northeastern University, Boston, Massachusetts 02115
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Dai WM, Wu J, Fong KC, Lee MYH, Lau CW. Regioselective Synthesis of Acyclic cis-Enediynes via an Acid-Catalyzed Rearrangement of 1,2-Dialkynylallyl Alcohols. Syntheses, Computational Calculations, and Mechanism. J Org Chem 1999; 64:5062-5082. [DOI: 10.1021/jo982476v] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei-Min Dai
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Jinlong Wu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Kin Chiu Fong
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Mavis Yuk Ha Lee
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Chi Wai Lau
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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Gamalevich GD, Morozov BN, Vlasyuk AL, Serebryakov EP. Lipase-mediated ‘meso-tricks’ to transform latently symmetrical d-aldoses into l-aldoses via alditols. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(98)01174-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Crich D, Pavlovic AB, Wink DJ. Synthesis Of Fully-Substituted Enediynes by the Corey-Winter Reaction. SYNTHETIC COMMUN 1999. [DOI: 10.1080/00397919908085778] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Rational design, synthesis, and reactivity of lactendiynes, a new class of cyclic enediynes ortho-fused with the β-lactam ring. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)00036-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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23
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Katritzky AR, Zhang Z, Lang H. α-(Benzotriazol-1-YL)Propargyl Ethyl Ethers: Novel Precursors to Enediynes, Enynes and Dienynes. SYNTHETIC COMMUN 1996. [DOI: 10.1080/00397919608003826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Dai WM, Fong KC. First synthesis of cis-enediynes from 1,5-diynes by an acid-mediated allylic rearrangement. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)01924-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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26
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Grissom JW, Gunawardena GU, Klingberg D, Huang D. The chemistry of enediynes, enyne allenes and related compounds. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00016-6] [Citation(s) in RCA: 307] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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27
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Dai WM, Fong KC, Danjo H, Nishimoto SI. Synthese voncis-Endiinen durch Umlagerung einer allylischen Doppelbindung. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961080717] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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28
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Cao XP, Chan TL, Chow HF. Direct conversion of dipropargylic sulfones into (E)- and (Z)-hex-3-ene-1,5-diynes by a modified one-flask Ramberg-Bäcklund reaction. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(95)02345-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Kuwatani Y, Ueda I. Synthese neuer Dehydroannulene vom Sworski-Typ:3,4-Benz-1,2,5,6,8,9,12, 13-octadehydro[14]annulene. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951071718] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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31
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32
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33
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34
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Nuss JM, Murphy MM. Highly efficient photochemical synthesis of the enediyne functionality via a Norrish type II reaction. Tetrahedron Lett 1994. [DOI: 10.1016/0040-4039(94)88156-1] [Citation(s) in RCA: 27] [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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