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Asymmetric synthesis of trans-4,5-dioxygenated cyclopentenone derivatives by organocatalyzed rearrangement of pyranones and enzymatic dynamic kinetic resolution. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.02.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Affiliation(s)
- Stéphane P. Roche
- Department of Chemistry, Center for Chemical Methodology and Library Development, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
| | - David J. Aitken
- Université Paris‐Sud 11, Laboratoire de Synthèse Organique & Méthodologie, ICMMO (CNRS UMR 8182), 15 rue Georges Clemenceau, 91405 Orsay cedex, France, Fax: +33‐1‐69156278
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3
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O’Gorman PA, Chen T, Cross HE, Naeem S, Pitard A, Qamar MI, Hemming K. A new and simple method for the synthesis of highly functionalised pyrrolizidines, indolizidines and pyrroloazepines. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.08.061] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4
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Thominet O, Baker JR, Britton H, Etheridge ZC, Soscia MG, Caddick S. Synthetic strategies to epoxydiynes and a key synthon of the neocarzinostatin chromophore. Org Biomol Chem 2007; 5:3703-12. [DOI: 10.1039/b711196g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Lee S, Kim WG, Kim E, Ryoo IJ, Lee HK, Kim JN, Jung SH, Yoo ID. Synthesis and melanin biosynthesis inhibitory activity of (+/-)-terrein produced by Penicillium sp. 20135. Bioorg Med Chem Lett 2005; 15:471-3. [PMID: 15603975 DOI: 10.1016/j.bmcl.2004.10.057] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2004] [Accepted: 10/12/2004] [Indexed: 11/18/2022]
Abstract
Terrein was isolated from Penicillium sp. 20135, prepared by a practical synthetic way, and evaluated first time for its melanin biosynthesis inhibitory activity.
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Affiliation(s)
- Sangku Lee
- Korea Research Institute of Bioscience and Biotechnology, 52 Oun, Yusong, Taejon 305-333, Republic of Korea
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6
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Myers AG, Glatthar R, Hammond M, Harrington PM, Kuo EY, Liang J, Schaus SE, Wu Y, Xiang JN. Development of an enantioselective synthetic route to neocarzinostatin chromophore and its use for multiple radioisotopic incorporation. J Am Chem Soc 2002; 124:5380-401. [PMID: 11996579 DOI: 10.1021/ja012487x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convergent, enantioselective synthetic route to the natural product neocarzinostatin chromophore (1) is described. Synthesis of the chromophore aglycon (2) was targeted initially. Chemistry previously developed for the synthesis of a neocarzinostatin core model (4) failed in the requisite 1,3-transposition of an allylic silyl ether when applied toward the preparation of 2 with use of the more highly oxygenated substrates 27 and 54. An alternative synthetic plan was therefore developed, based upon a proposed reduction of the epoxy alcohol 58 to form the aglycon 2, a transformation that was achieved in a novel manner, using a combination of the reagents triphenylphosphine, iodine, and imidazole. The successful route to 1 and 2 began with the convergent coupling of the epoxydiyne 15, obtained in 9 steps (43% overall yield) from D-glyceraldehyde acetonide, and the cyclopentenone (+)-14, prepared in one step (75-85% yield) from the prostaglandin intermediate (+)-16, affording the alcohol 22 in 80% yield and with > or =20:1 diastereoselectivity. The alcohol 22 was then converted into the epoxy alcohol 58 in 17 steps with an average yield of 92% and an overall yield of 22%. Key features of this sequence include the diastereoselective Sharpless asymmetric epoxidation of allylic alcohol 81 (98% yield); intramolecular acetylide addition within the epoxy aldehyde 82, using Masamune's lithium diphenyltetramethyldisilazide base (85% yield); selective esterification of the diol 84 with the naphthoic acid 13 followed by selective cleavage of the chloroacetate protective group in situ to furnish the naphthoic acid ester 85 in 80% yield; and elimination of the tertiary hydroxyl group within intermediate 88 using the Martin sulfurane reagent (79% yield). Reductive transposition of the product epoxy alcohol (58) then formed neocarzinostatin chromophore aglycon (2, 71% yield). Studies directed toward the glycosylation of 2 focused initially on the preparation of the N-methylamino --> hydroxyl replacement analogue 3, an alpha-D-fucose derivative of neocarzinostatin chromophore, formed in 42% yield by a two-step Schmidt glycosylation-deprotection sequence. For the synthesis of 1, an extensive search for a suitable 2'-N-methylfucosamine glycosyl donor led to the discovery that the reaction of 2 with the trichloroacetimidate 108, containing a free N-methylamino group, formed the alpha-glycoside 114 selectively in the presence of boron trifluoride diethyl etherate. Subsequent deprotection of 114 under mildly acidic conditions then furnished the labile chromophore (1). The synthetic route was readily modified for the preparation of singly and doubly (3)H- and (14)C-labeled 1, compounds unavailable by other means, for studies of the mechanism of action of neocarzinostatin in vivo.
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Affiliation(s)
- Andrew G Myers
- Contribution from the Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
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8
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The Nicholas reaction: the use of dicobalt hexacarbonyl-stabilised propargylic cations in synthesis. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00315-0] [Citation(s) in RCA: 254] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Krafft ME, Boñaga LVR, Wright JA, Hirosawa C. Cobalt carbonyl-mediated carbocyclizations of enynes: generation of bicyclooctanones or monocyclic alkenes. J Org Chem 2002; 67:1233-46. [PMID: 11846668 DOI: 10.1021/jo016118v] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Depending on the thermolytic conditions, dicobalthexacarbonyl-complexed enynes underwent cyclizations to provide different carbocyclic frameworks. Bicyclopentanones were formed from enyne-Co2(CO)6 complexes, or from enynes that were treated with Co2(CO)8, or more effectively, with Co4(CO)12 in an alcoholic solvent under a H2 or N2 atmosphere. This transformation proceeded via a sequential cyclocarbonylation and 1,4-reduction and is the first account using the cobalt carbonyl cluster. Under these conditions a cobalt hydride was presumably generated, which mediated reduction of the enone to the saturated ketone. In contrast, thermolysis of dicobalthexacarbonyl-complexed enynes under a hydrogen atmosphere in toluene resulted in their reductive cyclization to form monocyclic alkenes in moderate yields, in addition to the bicyclopentenone product. In some cases, addition of a hydrosilane to the reaction induced a complete suppression of the bicyclopentenone formation. While the former results demonstrate a reaction that occurs after the cycloaddition, the latter depicts another example of an interruption of the normal route in the Pauson-Khand reaction pathway.
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Affiliation(s)
- Marie E Krafft
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306-4390, USA.
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10
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Burlison JA, Gray JM, Young DG. Metathesis in the presence of a transition metal alkyne complex. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01017-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Caddick S, Cheung S, Doyle V, Frost L, Soscia M, Delisser V, Williams M, Etheridge Z, Khan S, Hitchcock P, Pairaudeau G, Vile S. Stereoselective synthesis of polyfunctionalised hydroxylated cyclopentanes from dihydroxylated 2-cyclopentenone derivatives. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00590-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Toyama K, Iguchi S, Sakazaki H, Oishi T, Hirama M. Convenient Route to Both Enantiomerically Pure Forms oftrans-4,5-Dihydroxy-2-cyclopenten-1-one: Efficient Synthesis of the Neocarzinostatin Chromophore Core. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2001. [DOI: 10.1246/bcsj.74.997] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Lear MJ, Yoshimura F, Hirama M. A Direct and Efficientα-Selective Glycosylation Protocol for the Kedarcidin Sugar,L-Mycarose: AgPF6 as a Remarkable Activator of 2-Deoxythioglycosides. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010302)113:5<972::aid-ange972>3.0.co;2-0] [Citation(s) in RCA: 13] [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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14
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Lear MJ, Yoshimura F, Hirama M. A Direct and Efficient α-Selective Glycosylation Protocol for the Kedarcidin Sugar, L-Mycarose: AgPF 6 as a Remarkable Activator of 2-Deoxythioglycosides. Angew Chem Int Ed Engl 2001; 40:946-949. [PMID: 29712166 DOI: 10.1002/1521-3773(20010302)40:5<946::aid-anie946>3.0.co;2-g] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2000] [Indexed: 11/09/2022]
Abstract
The α-selective effect and potency of AgPF6 on readily prepared 2-deoxythioglycosides allows the direct attachment of a partially protected allo-sugar, such as L-mycarose, to an advanced and hindered aglycon unit of kedarcidin. This method also permits access to other 2-deoxyglycosides in an expedient and mild manner. PMBM=p-methoxybenzyloxymethyl, Alloc=allyloxycarbonyl, TES=triethylsilyl.
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Affiliation(s)
- Martin J Lear
- Department of Chemistry, Graduate School of Science Tohoku University, and CREST Japan Science and Technology Corporation (JST) Sendai 980-8578 (Japan) Fax: (+81) 22-217-6566
| | - Fumihiko Yoshimura
- Department of Chemistry, Graduate School of Science Tohoku University, and CREST Japan Science and Technology Corporation (JST) Sendai 980-8578 (Japan) Fax: (+81) 22-217-6566
| | - Masahiro Hirama
- Department of Chemistry, Graduate School of Science Tohoku University, and CREST Japan Science and Technology Corporation (JST) Sendai 980-8578 (Japan) Fax: (+81) 22-217-6566
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15
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Studies Toward the Synthesis of Natural and Unnatural Dienediynes. Part 2: A Practical Approach to Functionalised Cyclopentenones. Tetrahedron 2000. [DOI: 10.1016/s0040-4020(00)00846-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Synthetic study of kedarcidin chromophore: atropselective construction of the ansamacrolide. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)01744-x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Lear MJ, Hirama M. Convenient route to derivatives of the 2-deoxysugar subunits of the kedarcidin chromophore: L-mycarose and L-kedarosamine. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00906-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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18
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Caddick S, Delisser V, Doyle V, Khan S, Avent A, Vile S. Studies toward the synthesis of natural and unnatural dienediynes 1. Approaches to a functionalised bicyclic ring system. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00045-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Mita T, Kawata S, Hirama M. Evidence for Spontaneous Cycloaromatization of Nine-Membered Monocyclic Enediyne. CHEM LETT 1998. [DOI: 10.1246/cl.1998.959] [Citation(s) in RCA: 10] [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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20
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21
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Iwasawa N, Matsuo T, Iwamoto M, Ikeno T. Rearrangement of 1-(1-Alkynyl)cyclopropanols to 2-Cyclopentenones via Their Hexacarbonyldicobalt Complexes. A New Use of Alkyne−Co2(CO)6 Complexes in Organic Synthesis. J Am Chem Soc 1998. [DOI: 10.1021/ja9734004] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nobuharu Iwasawa
- Contribution from the Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113
| | - Takeshi Matsuo
- Contribution from the Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113
| | - Mari Iwamoto
- Contribution from the Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113
| | - Taketo Ikeno
- Contribution from the Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113
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22
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Caddick S, Shanmugathasan S, Brasseur D, Delisser VM. Asymmetric dihydroxylation of homoallylic enynols. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01259-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Caddick S, Khan S, Smith NJ, Barr DM, Delisser VM. Synthesis of a dihydroxylated dienediyne analogue related to neocarzinostatin chromophore. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01063-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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