51
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Firdous S, Kazmaier U. Syntheses of Functionalized Allylamines via Lithiated Intermediates. European J Org Chem 2014. [DOI: 10.1002/ejoc.201400017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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52
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53
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Rummelt SM, Fürstner A. Ruthenium-Catalyzedtrans-Selective Hydrostannation of Alkynes. Angew Chem Int Ed Engl 2014; 53:3626-30. [DOI: 10.1002/anie.201311080] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Indexed: 11/05/2022]
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54
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Rummelt SM, Fürstner A. Ruthenium-Catalyzedtrans-Selective Hydrostannation of Alkynes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201311080] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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55
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56
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Abstract
Chaetochalasin A is a complex natural product whose biosynthesis may involve two domino Diels–Alder reactions.
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Affiliation(s)
- Eric J. Thomas
- The School of Chemistry
- The University of Manchester
- Manchester, UK
| | - Mark Willis
- The School of Chemistry
- The University of Manchester
- Manchester, UK
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57
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58
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Richard JA. Chemistry and Biology of the Polycyclic Polyprenylated Acylphloroglucinol Hyperforin. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300815] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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59
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Synthesis of enantiomerically pure model compounds of the glucose-6-phosphate-T1-translocase inhibitors kodaistatins A–D. Inferences with regard to the stereostructure of the natural products. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.05.091] [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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60
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Abstract
A convergent, enantiocontrolled total synthesis of the 15-membered macrolide, amphidinolide P, is described. The synthesis utilizes three nonracemic components for an efficient assembly of the macrolactone in 12 steps via the longest linear pathway. Key developments include studies of the Hosomi-Sakurai reaction for the formation of the C6-C7 bond, a "ligandless" palladium-mediated Stille cross-coupling of the vinylic stannane 4 and the alkenyl bromide 5 to produce a highly functionalized dienol, and a thermally induced, intramolecular lactonization via the late-stage formation of an intermediate α-acylketene.
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Affiliation(s)
- David R Williams
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, USA.
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61
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62
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Dalby SM, Goodwin-Tindall J, Paterson I. Total Synthesis of (−)-Rhizopodin. Angew Chem Int Ed Engl 2013; 52:6517-21. [DOI: 10.1002/anie.201301978] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Indexed: 12/18/2022]
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63
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Reddy CR, Suman D, Rao NN. Alkyne-Mediated Approach for Total Syntheses of Cladospolides A, B, C andiso-Cladospolide B. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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64
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65
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Nakada M, Tomizawa T, Namera Y, Orimoto K, Oyama H, Niwa T. PREPARATION OF IMIDES vIA THE PALLADIUM-CATALYZED COUPLING REACTION OF ORGANOSTANNANES WITH METHYL N-[METHOXY(METHYLTHIO)METHYLENE]CARBAMATE. HETEROCYCLES 2013. [DOI: 10.3987/com-13-12662] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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66
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Altendorfer M, Raja A, Sasse F, Irschik H, Menche D. Modular synthesis of polyene side chain analogues of the potent macrolide antibiotic etnangien by a flexible coupling strategy based on hetero-bis-metallated alkenes. Org Biomol Chem 2013. [DOI: 10.1039/c2ob26906f] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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67
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Hussain H, Green IR, Krohn K, Ahmed I. Advances in the total synthesis of biologically important callipeltosides: a review. Nat Prod Rep 2013; 30:640-93. [DOI: 10.1039/c3np20110d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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68
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Igarashi Y, Aoki K, Nishimura H, Morishita I, Usui K. Total synthesis of hydroxy-α- and hydroxy-β-sanshool using Suzuki-Miyaura coupling. Chem Pharm Bull (Tokyo) 2012; 60:1088-91. [PMID: 22863716 DOI: 10.1248/cpb.c12-00382] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Here, we describe the first total synthesis of hydroxyl-α- and hydroxyl-β-sanshool, which involves Suzuki-Miyaura coupling (SMC). Hydroxy-α-sanshool (1) was synthesized by SMC of bromoalkyne 4 with boronate 3 followed by (Z)-selective reduction of the triple bond in the coupling product. Hydroxy-β-sanshool (2) was synthesized by regio- and (E)-selective conversion of 4 to iodoalkene 11 followed by SMC with 3.
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Affiliation(s)
- Yasushi Igarashi
- Kampo Formulations Development Center, Tsumura & Co., 3586 Yoshiwara, Ami-mach, Inashiki-gun, Ibaraki 300-1192, Japan.
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69
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Wagh B, Paul T, Glassford I, DeBrosse C, Klepacki D, Small MC, MacKerell AD, Andrade RB. Desmethyl Macrolides: Synthesis and Evaluation of 4,8-Didesmethyl Telithromycin. ACS Med Chem Lett 2012; 3:1013-1018. [PMID: 24015325 DOI: 10.1021/ml300230h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
There is an urgent need for novel sources of antibiotics to address the incessant and inevitable onset of bacterial resistance. To this end, we have initiated a structure-based drug design program that features a desmethylation strategy (i.e., replacing methyl groups with hydrogens). Herein we report the total synthesis, molecular modeling and biological evaluation of 4,8-didesmethyl telithromycin (5), a novel desmethyl analogue of the third-generation ketolide antibiotic telithromycin (2), which is an FDA-approved semisynthetic derivative of erythromycin (1). We found 4,8-didesmethyl telithromycin (5) to be eight times more active than previously prepared 4,8,10-tridesmethyl congener (3) and two times more active than 4,10-didesmethyl regioisomer (4) in MIC assays. While less potent than telithromycin (2) and paralleling the observations made in the previous study of 4,10-didesmethyl analogue (4), the inclusion of a single methyl group improves biological activity thus supporting its role in antibiotic activity.
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Affiliation(s)
- Bharat Wagh
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122,
United States
| | - Tapas Paul
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122,
United States
| | - Ian Glassford
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122,
United States
| | - Charles DeBrosse
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122,
United States
| | - Dorota Klepacki
- Center for
Pharmaceutical Biotechnology, University of Illinois, Chicago, Illinois 60607, United
States
| | - Meagan C. Small
- Department of Pharmaceutical
Sciences, University of Maryland, Baltimore,
Maryland 21201,
United States
| | - Alexander D. MacKerell
- Department of Pharmaceutical
Sciences, University of Maryland, Baltimore,
Maryland 21201,
United States
| | - Rodrigo B. Andrade
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122,
United States
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70
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Ilies L, Yoshida T, Nakamura E. Iron-catalyzed chemo- and stereoselective hydromagnesiation of diarylalkynes and diynes. J Am Chem Soc 2012; 134:16951-4. [PMID: 23034081 DOI: 10.1021/ja307631v] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Diarylalkynes are chemo- and stereoselectively hydromagnesiated in high yields at room temperature with an iron species generated in situ from FeCl(2)and EtMgBr. Functional groups such as bromide, iodide, amine, phenoxide, and alkene are well tolerated. Under similar conditions, diynes are chemo-, regio-, and stereoselectively hydromagnesiated. The resulting alkenylmagnesium compounds are a platform for further functionalization as a one-pot reaction.
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Affiliation(s)
- Laurean Ilies
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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71
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Pawar AB, Prasad KR. Formal Total Synthesis of Palmerolide A. Chemistry 2012; 18:15202-6. [DOI: 10.1002/chem.201202324] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Indexed: 11/07/2022]
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72
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Candy M, Tomas L, Parat S, Heran V, Bienaymé H, Pons JM, Bressy C. A Convergent Approach to (−)-Callystatin A Based on Local Symmetry. Chemistry 2012; 18:14267-71. [DOI: 10.1002/chem.201202701] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Indexed: 11/10/2022]
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73
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Frost JR, Pearson CM, Snaddon TN, Booth RA, Ley SV. Convergent Total Syntheses of Callipeltosides A, B, and C. Angew Chem Int Ed Engl 2012; 51:9366-71. [DOI: 10.1002/anie.201204868] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Indexed: 11/11/2022]
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74
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Frost JR, Pearson CM, Snaddon TN, Booth RA, Ley SV. Convergent Total Syntheses of Callipeltosides A, B, and C. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201204868] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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75
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Pandey G, Gadre SR. Stereoselective construction of 5,11-methanomorphanthridine and 5,10b-phenanthridine structural frameworks: Total syntheses of (±)-pancracine, (±)-brunsvigine, (±)-maritidine, and (±)-crinine. PURE APPL CHEM 2012. [DOI: 10.1351/pac-con-11-10-12] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The core structure of the complex pentacyclic 5,11-methanomorphanthridine skeleton and the vicinal quaternary and tertiary stereocenters of the 5,10b-phenanthridine skeleton are constructed stereospecifically in one step employing intramolecular 1,3-dipolar cycloaddition of a nonstabilized azomethine ylide (AMY) generated by the sequential double desilylation of appropriate bis-trimethylsilylmethyl amines using Ag(I)F as a single-electron oxidant. The strategy is successfully applied for the total synthesis of biologically active alkaloids such as (±)-pancracine, (±)-brunsvigine, (±)-maritidine, and (±)-crinine.
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Affiliation(s)
- Ganesh Pandey
- 1Division of Organic Chemistry, National Chemical Laboratory, Pune-411008, India
| | - Smita R. Gadre
- 1Division of Organic Chemistry, National Chemical Laboratory, Pune-411008, India
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76
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Sumida Y, Kato T, Yoshida S, Hosoya T. Palladium-Catalyzed Regio- and Stereoselective Hydrosilylation of Electron-Deficient Alkynes. Org Lett 2012; 14:1552-5. [DOI: 10.1021/ol300279c] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuto Sumida
- Laboratory of Chemical Biology, Graduate School of Biomedical Science, Institute of Biomaterials and Bioengineerings, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Tomoe Kato
- Laboratory of Chemical Biology, Graduate School of Biomedical Science, Institute of Biomaterials and Bioengineerings, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Suguru Yoshida
- Laboratory of Chemical Biology, Graduate School of Biomedical Science, Institute of Biomaterials and Bioengineerings, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Biology, Graduate School of Biomedical Science, Institute of Biomaterials and Bioengineerings, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
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77
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Fuwa H. Total Synthesis of Tetrahydropyran-Containing Natural Products Exploiting Intramolecular Oxa-Conjugate Cyclization. HETEROCYCLES 2012. [DOI: 10.3987/rev-12-730] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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78
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79
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Darwish A, Chong JM. Synthesis of E-vinyl iodides via Pd-catalyzed hydrostannation of terminal alkynes. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.104] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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80
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Richard JA, Chen DYK. A Chiral-Pool-Based Approach to the Core Structure of (+)-Hyperforin. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101629] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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81
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Zhao H, Yang W, Xie S, Cai M. Stereoselective Synthesis of Difunctionalized 1,3-Dienes Containing Tin and Sulfonyl Groups by Palladium-Catalyzed Regio- and Stereocontrolled Addition Reactions. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101153] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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82
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Paterson I, Steadman neé Doughty VA, McLeod MD, Trieselmann T. Stereocontrolled total synthesis of (+)-concanamycin F: the strategic use of boron-mediated aldol reactions of chiral ketones. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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83
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Kong K, Moussa Z, Lee C, Romo D. Total synthesis of the spirocyclic imine marine toxin (-)-gymnodimine and an unnatural C4-epimer. J Am Chem Soc 2011; 133:19844-56. [PMID: 22023219 DOI: 10.1021/ja207385y] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first total synthesis of the marine toxin (-)-gymnodimine (1) has been accomplished in a convergent manner. A highly diastereo- and enantioselective exo-Diels-Alder reaction catalyzed by a bis-oxazoline Cu(II) catalyst enabled rapid assembly of the spirocyclic core of gymnodimine. The preparation of the tetrahydrofuran fragment utilized a chiral auxiliary based anti-aldol reaction. Two major fragments, spirolactam 56 and tetrahydrofuran 55, were then coupled through an efficient Nozaki-Hiyama-Kishi reaction. An unconventional, ambient temperature t-BuLi-initiated intramolecular Barbier reaction of alkyl iodide 64 was employed to form the macrocycle. A late stage vinylogous Mukaiyama aldol addition of a silyloxyfuran to a complex cyclohexanone 83 appended the butenolide, and a few additional steps provided (-)-gymnodimine (1). A diastereomer of the natural product was also synthesized, C4-epi-gymnodimine (90), derived from the vinylogous Mukaiyama aldol addition.
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Affiliation(s)
- Ke Kong
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, USA
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84
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Ni, Co, and Mo-metal-catalyzed alkynes hydrostannations using Bu(3)SnCl/PMHS/KF/18-crown-6 as an in situ Bu(3)SnH source. Tetrahedron Lett 2011; 52:5285-2587. [PMID: 22013284 DOI: 10.1016/j.tetlet.2011.08.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A number of terminal alkynes were subjected to nickel, cobalt, and molybdenum catalyzed hydrostannations in presence of tributyltin chloride, polymethylhydrosiloxane, potassium fluoride and 18-crown-6 as an situ organotin hydride source to produce vinylstannanes.
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85
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Tanaka K, Sasaki A, Cao HQ, Yamada T, Igarashi M, Komine I, Nakahigashi H, Minami N, Kuwahara S, Nukina M, Kiyota H. Synthesis and Biotransformation of Plausible Biosynthetic Intermediates of Salicylaldehyde-Type Phytotoxins of Rice Blast Fungus, Magnaporthe grisea. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100771] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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86
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87
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Morgenroth A, Urusova EA, Dinger C, Al-Momani E, Kull T, Glatting G, Frauendorf H, Jahn O, Mottaghy FM, Reske SN, Zlatopolskiy BD. New Molecular Markers for Prostate Tumor Imaging: A Study on 2-Methylene Substituted Fatty Acids as New AMACR Inhibitors. Chemistry 2011; 17:10144-50. [DOI: 10.1002/chem.201003176] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 05/09/2011] [Indexed: 11/10/2022]
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88
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Hilli F, White JM, Rizzacasa MA. Formal total synthesis of the myxobacteria metabolite apicularen A via a transannular oxy-Michael addition. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.04.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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89
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Clausen DJ, Wan S, Floreancig PE. Total synthesis of the protein phosphatase 2A inhibitor lactodehydrothyrsiferol. Angew Chem Int Ed Engl 2011; 50:5178-81. [PMID: 21520363 PMCID: PMC3140912 DOI: 10.1002/anie.201007757] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 03/15/2011] [Indexed: 11/07/2022]
Affiliation(s)
- Dane J. Clausen
- Department of Chemistry, University of Pittsburgh Pittsburgh, Pennsylvania 15260 (USA)
| | - Shuangyi Wan
- Department of Chemistry, University of Pittsburgh Pittsburgh, Pennsylvania 15260 (USA)
| | - Paul E. Floreancig
- Department of Chemistry, University of Pittsburgh Pittsburgh, Pennsylvania 15260 (USA)
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90
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Banini SR, Turner MR, Cummings MM, Söderberg BC. A base-modulated chemoselective synthesis of 3-cyanoindoles or 4-cyanoquinolines using a palladium-catalyzed N-heterocyclization. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.03.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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91
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Clausen DJ, Wan S, Floreancig PE. Total Synthesis of the Protein Phosphatase 2A Inhibitor Lactodehydrothyrsiferol. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007757] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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92
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Han-ya Y, Tokuyama H, Fukuyama T. Total Synthesis of (−)-Conophylline and (−)-Conophyllidine. Angew Chem Int Ed Engl 2011; 50:4884-7. [DOI: 10.1002/anie.201100981] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Indexed: 01/07/2023]
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93
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Han-ya Y, Tokuyama H, Fukuyama T. Total Synthesis of (−)-Conophylline and (−)-Conophyllidine. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100981] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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94
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Sun XY, Tian XY, Li ZW, Peng XS, Wong HNC. Total synthesis of plakortide E and biomimetic synthesis of plakortone B. Chemistry 2011; 17:5874-80. [PMID: 21491517 DOI: 10.1002/chem.201003309] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Indexed: 11/09/2022]
Abstract
The total synthesis of plakortide E (1a) is reported. A novel palladium-catalyzed approach towards 1,2-dioxolanes as well as an alternative substrate-controlled route leading exclusively to cis-highly substituted 1,2-dioxolanes have been developed. A lipase-catalyzed kinetic resolution was employed to provide optically pure 1,2-dioxolane central cores. Coupling of the central cores and side chains was achieved by a modified Negishi reaction. All four isomeric structures of plakortide E methyl ester, namely, 26a-d were synthesized. One of the structures, 26d, was shown to be identical with the natural plakortide E methyl ester on the basis of (1)H, (13)C NMR spectra and specific rotation comparisons. With the plakortide E methyl ester (4S,6R,10R)-(-)-cis-26d and its other three isomers in hand, we successfully converted them into (3S,4S,6R,10R)-plakortone B (2a), and its isomers ent-2a, 2b and ent-2b via an intramolecular oxa-Michael addition/lactonization cascade reaction. Finally, saponification converted 1,2-dioxolane 26d into plakortide E (1a) whose absolute configuration (4S,6R,10R) was confirmed by comparison of spectral and physical data with those reported.
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Affiliation(s)
- Xiao-Yu Sun
- Department of Chemistry, Centre of Novel Functional Molecules, Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, PR China
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95
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Hanessian S, Soma U, Dorich S, Deschênes-Simard B. Total Synthesis of (+)-ent-Cyclizidine: Absolute Configurational Confirmation of Antibiotic M146791. Org Lett 2011; 13:1048-51. [DOI: 10.1021/ol103094j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stephen Hanessian
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Centre-ville, Montreal, QC, H3C 3J7, Canada
| | - Udaykumar Soma
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Centre-ville, Montreal, QC, H3C 3J7, Canada
| | - Stéphane Dorich
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Centre-ville, Montreal, QC, H3C 3J7, Canada
| | - Benoît Deschênes-Simard
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Station Centre-ville, Montreal, QC, H3C 3J7, Canada
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96
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Fuwa H, Suzuki T, Kubo H, Yamori T, Sasaki M. Total synthesis and biological assessment of (-)-exiguolide and analogues. Chemistry 2011; 17:2678-88. [PMID: 21264972 DOI: 10.1002/chem.201003135] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Indexed: 11/06/2022]
Abstract
We describe herein an enantioselective total synthesis of (-)-exiguolide, the natural enantiomer. The methylene bis(tetrahydropyran) substructure was efficiently synthesized by exploiting olefin cross-metathesis for the assembly of readily available acyclic segments and intramolecular oxa-conjugate cyclization and reductive etherification for the formation of the tetrahydropyran rings. The 20-membered macrocyclic framework was constructed in an efficient manner by means of Julia-Kocienski coupling and Yamaguchi macrolactonization. Finally, the (E,Z,E)-triene side chain was introduced stereoselectively via Suzuki-Miyaura coupling to complete the total synthesis. Assessment of the growth inhibitory activity of synthetic (-)-exiguolide against a panel of human cancer cell lines elucidated for the first time that this natural product is an effective antiproliferative agent against the NCI-H460 human lung large cell carcinoma and the A549 human lung adenocarcinoma cell lines. Moreover, we have investigated structure-activity relationships of (-)-exiguolide, which elucidated that the C5-methoxycarbonylmethylidene group and the length of the side chain are important for the potent activity.
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Affiliation(s)
- Haruhiko Fuwa
- Graduate School of Life Sciences, Tohoku University, Aoba-ku, Sendai, Japan.
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97
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Bukovec C, Wesquet AO, Kazmaier U. Insights into the Reaction Behaviour of Stannylated Allylic Substrates. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001400] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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98
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Pandey G, Gupta NR, Gadre SR. Construction of the 5,10b-Phenanthridine Skeleton Using [3+2]-Cycloaddition of a Non-Stabilized Azomethine Ylide: Total Synthesis of (±)-Maritidine and (±)-Crinine Alkaloids. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001263] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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99
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Lynch JE, Zanatta SD, White JM, Rizzacasa MA. Stereoselective Total Synthesis of (−)-Spirofungin A by Utilising Hydrogen-Bond Controlled Spiroketalisation. Chemistry 2010; 17:297-304. [DOI: 10.1002/chem.201002501] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2010] [Indexed: 11/05/2022]
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100
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Paley RS, Laupheimer MC, Erskine NAK, Rablen PR, Pike RD, Jones JS. Diastereoselective Spiroketalization: Stereocontrol Using An Iron(0) Tricarbonyl Diene Complex. Org Lett 2010; 13:58-61. [DOI: 10.1021/ol102472g] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert S. Paley
- Swarthmore College, Department of Chemistry and Biochemistry, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States, and College of William & Mary, Department of Chemistry, P.O. Box 8795, Williamsburg, Virginia 23187, United States
| | - Madeleine C. Laupheimer
- Swarthmore College, Department of Chemistry and Biochemistry, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States, and College of William & Mary, Department of Chemistry, P.O. Box 8795, Williamsburg, Virginia 23187, United States
| | - Nathaniel A. K. Erskine
- Swarthmore College, Department of Chemistry and Biochemistry, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States, and College of William & Mary, Department of Chemistry, P.O. Box 8795, Williamsburg, Virginia 23187, United States
| | - Paul R. Rablen
- Swarthmore College, Department of Chemistry and Biochemistry, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States, and College of William & Mary, Department of Chemistry, P.O. Box 8795, Williamsburg, Virginia 23187, United States
| | - Robert D. Pike
- Swarthmore College, Department of Chemistry and Biochemistry, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States, and College of William & Mary, Department of Chemistry, P.O. Box 8795, Williamsburg, Virginia 23187, United States
| | - James S. Jones
- Swarthmore College, Department of Chemistry and Biochemistry, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States, and College of William & Mary, Department of Chemistry, P.O. Box 8795, Williamsburg, Virginia 23187, United States
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