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Rinkel J, Dickschat JS. Mechanistic Studies on Trichoacorenol Synthase from Amycolatopsis benzoatilytica. Chembiochem 2020; 21:807-810. [PMID: 31553510 PMCID: PMC7155024 DOI: 10.1002/cbic.201900584] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Indexed: 01/17/2023]
Abstract
Isotopic labeling experiments performed with a newly identified bacterial trichoacorenol synthase established a 1,5-hydride shift occurring in the cyclization mechanism. During EI-MS analysis, major fragments of the sesquiterpenoid were shown to arise via cryptic hydrogen movements. Therefore, the interpretation of earlier results regarding the cyclization mechanism obtained by feeding experiments in Trichoderma is revised.
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Affiliation(s)
- Jan Rinkel
- Kekulé Institute of Organic Chemistry and BiochemistryUniversity of BonnGerhard-Domagk-Strasse 153121BonnGermany
| | - Jeroen S. Dickschat
- Kekulé Institute of Organic Chemistry and BiochemistryUniversity of BonnGerhard-Domagk-Strasse 153121BonnGermany
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2
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Ogba OM, Elliott SJ, Kolin DA, Brown LJ, Cevallos S, Sawyer S, Levitt MH, O'Leary DJ. Origins of Small Proton Chemical Shift Differences in Monodeuterated Methyl Groups. J Org Chem 2017; 82:8943-8949. [PMID: 28745884 DOI: 10.1021/acs.joc.7b01356] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have recently shown that the small proton chemical shift difference in 2-methyl-1-(methyl-d)piperidine supports a long-lived nuclear spin state. To identify additional candidate molecules with CH2D groups exhibiting accessible long-lived states, and to investigate the factors governing the magnitude of the shift differences, we report a computational and experimental investigation of methyl rotational equilibria and proton chemical shifts in a variety of 2-substituted 1-(methyl-d)piperidines. The polarity and size of the 2-substituent affect the 1,2-stereoisomeric relationship, and consequently, the strength of the rotational asymmetry within the CH2D group. Nonpolar and large 2-substituents prefer the equatorial position, and relatively large shift differences (i.e., > 13 ppb) are observed. Polar and small substituents, however, increasingly prefer the axial position, and medium to small shift differences (i.e., 0 to 9 ppb) are observed. In addition, the diastereotopic CH2D proton chemical shift difference for tricarbonyl(1-chloro-2-deuteriomethylbenzene) chromium(0) was computed, showing that reasonable predictions of these small shift differences can be extended to more complex, organometallic species.
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Affiliation(s)
- O Maduka Ogba
- Department of Chemistry, Pomona College , 645 North College Avenue, Claremont, California 91711, United States
| | - Stuart J Elliott
- School of Chemistry, University of Southampton , Southampton SO17 1BJ, United Kingdom
| | - David A Kolin
- Department of Chemistry, Pomona College , 645 North College Avenue, Claremont, California 91711, United States
| | - Lynda J Brown
- School of Chemistry, University of Southampton , Southampton SO17 1BJ, United Kingdom
| | - Sebastian Cevallos
- Department of Chemistry, Pomona College , 645 North College Avenue, Claremont, California 91711, United States
| | - Stuart Sawyer
- School of Chemistry, University of Southampton , Southampton SO17 1BJ, United Kingdom
| | - Malcolm H Levitt
- School of Chemistry, University of Southampton , Southampton SO17 1BJ, United Kingdom
| | - Daniel J O'Leary
- Department of Chemistry, Pomona College , 645 North College Avenue, Claremont, California 91711, United States
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3
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Luo G, Chen L, Conway CM, Denton R, Keavy D, Gulianello M, Huang Y, Kostich W, Lentz KA, Mercer SE, Schartman R, Signor L, Browning M, Macor JE, Dubowchik GM. Discovery of BMS-846372, a Potent and Orally Active Human CGRP Receptor Antagonist for the Treatment of Migraine. ACS Med Chem Lett 2012; 3:337-41. [PMID: 24900474 DOI: 10.1021/ml300021s] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Accepted: 02/27/2012] [Indexed: 01/14/2023] Open
Abstract
Calcitonin gene-related peptide (CGRP) receptor antagonists have been clinically shown to be effective in the treatment of migraine, but identification of potent and orally bioavailable compounds has been challenging. Herein, we describe the conceptualization, synthesis, and preclinical characterization of a potent, orally active CGRP receptor antagonist 5 (BMS-846372). Compound 5 has good oral bioavailability in rat, dog, and cynomolgus monkeys and overall attractive preclinical properties including strong (>50% inhibition) exposure-dependent in vivo efficacy in a marmoset migraine model.
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Affiliation(s)
- Guanglin Luo
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Ling Chen
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Charles M. Conway
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Rex Denton
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Deborah Keavy
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Michael Gulianello
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Yanling Huang
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Walter Kostich
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Kimberley A. Lentz
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Stephen E. Mercer
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Richard Schartman
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Laura Signor
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Marc Browning
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - John E. Macor
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Gene M. Dubowchik
- Molecular Sciences and Candidate Optimization, Neuroscience Biology, Bristol-Myers Squibb Research & Development, 5 Research Parkway, Wallingford, Connecticut 06492, United States
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Brock NL, Dickschat JS. Enantioselective Synthesis of the Unnatural Enantiomers of the Fungal Sesquiterpenoids Acorenone and Trichoacorenol. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100688] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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5
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Iwasaki H, Tsutsui N, Eguchi T, Ohno H, Yamashita M, Tanaka T. A novel samarium(II)-mediated tandem spirocyclization onto an aromatic ring. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.02.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Chamberlin S, Majumdar N, Wulff WD, Muntean JV, Ostrander RL, Rheingold AL. Origin of the regioselectivity in an intramolecular nucleophilic addition to arene chromium tricarbonyl complexes. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.07.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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7
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Yeh MCP, Pai HF, Hsiow CY, Wang YR. Facile Synthesis of Spirocyclic Ketones via Gold(I)-Catalyzed Claisen-Type Rearrangement of Cyclic 8-Aryl-2,7-enyn-1-ols. Organometallics 2009. [DOI: 10.1021/om900833k] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ming-Chang P. Yeh
- Department of Chemistry, National Taiwan Normal University, 88 Ding-Jou Road Section 4, Taipei 11677, Taiwan, Republic of China
| | - Hui-Fen Pai
- Department of Chemistry, National Taiwan Normal University, 88 Ding-Jou Road Section 4, Taipei 11677, Taiwan, Republic of China
| | - Chuen-Yo Hsiow
- Department of Chemistry, National Taiwan Normal University, 88 Ding-Jou Road Section 4, Taipei 11677, Taiwan, Republic of China
| | - Yan-Rong Wang
- Department of Chemistry, National Taiwan Normal University, 88 Ding-Jou Road Section 4, Taipei 11677, Taiwan, Republic of China
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Eloi A, Rose-Munch F, Rose E. Resolution of Planar Chiral Cationic (η6-Arene)tricarbonylmanganese Complexes. J Am Chem Soc 2009; 131:14178-9. [DOI: 10.1021/ja905712k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Antoine Eloi
- UPMC Univ Paris 06, IPCM, CNRS UMR 7201, Equipe Chimie Organique et Organométallique, Case 181, 4 Place Jussieu, F-75005 Paris, France
| | - Françoise Rose-Munch
- UPMC Univ Paris 06, IPCM, CNRS UMR 7201, Equipe Chimie Organique et Organométallique, Case 181, 4 Place Jussieu, F-75005 Paris, France
| | - Eric Rose
- UPMC Univ Paris 06, IPCM, CNRS UMR 7201, Equipe Chimie Organique et Organométallique, Case 181, 4 Place Jussieu, F-75005 Paris, France
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9
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Pigge FC, Dhanya R, Swenson DC. Synthesis of Polycyclic Cyclohexadienyl Ruthenium(II) Complexes from η6-Arene Precursors via Phosphine-Promoted Intramolecular Nucleophilic Aromatic Addition. Organometallics 2009. [DOI: 10.1021/om900178w] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - R. Dhanya
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
| | - Dale C. Swenson
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
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10
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Iwasaki H, Eguchi T, Tsutsui N, Ohno H, Tanaka T. Samarium(II)-Mediated Spirocyclization by Intramolecular Aryl Radical Addition onto an Aromatic Ring. J Org Chem 2008; 73:7145-52. [DOI: 10.1021/jo800656a] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroki Iwasaki
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Toru Eguchi
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Nozomi Tsutsui
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tetsuaki Tanaka
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
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11
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Türker L, Gümüş S. AB INITIOAND DFT STUDIES ON CERTAIN η6-ANTHRAQUINONE -Cr(CO)3COMPLEXES. Polycycl Aromat Compd 2008. [DOI: 10.1080/10406630802142862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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13
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Oppolzer W, Zutterman F, Bättig K. Total Synthesis of (±)-α-AcoradieneviaIntramolecular Photoaddition and Reductive Cyclobutane Cleavage. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19830660213] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Prim D, Andrioletti B, Rose-Munch F, Rose E, Couty F. Bimetallic Pd/Cr and Pd/Mn activation of carbon–halide bonds in organochromium and organomanganese complexes. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.02.002] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Addition reactions of lithiodimethylphenylsilane to (η4-1,3-diene)-Fe(CO)3 and (η6-arene)Cr(CO)3 complexes. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(03)00219-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Chae HS, Burkey DJ. Spirocyclic and Bicyclic Cyclohexadienyl Complexes from Intramolecular Nucleophilic Addition Reactions in Dicationic Arene Complexes. Organometallics 2003. [DOI: 10.1021/om030020k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hyun Sik Chae
- Department of Chemistry, San Diego State University, San Diego, California 92182
| | - David J. Burkey
- Department of Chemistry, San Diego State University, San Diego, California 92182
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17
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Pigge FC, Coniglio JJ, Fang S. Ruthenium-Coordinated Spirolactams via Intramolecular Nucleophilic Addition to η6-Arene Metal Complexes. Organometallics 2002. [DOI: 10.1021/om020592p] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F. Christopher Pigge
- Department of Chemistry and Biochemistry, University of Missouri, St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121-4499
| | - John J. Coniglio
- Department of Chemistry and Biochemistry, University of Missouri, St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121-4499
| | - Shiyue Fang
- Department of Chemistry and Biochemistry, University of Missouri, St. Louis, 8001 Natural Bridge Road, St. Louis, Missouri 63121-4499
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18
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Rudler H, Comte V, Garrier E, Bellassoued M, Chelain E, Vaissermann J. Meta, para and meta, ortho double exo nucleophilic additions of trimethylsilylester enolates derived from saturated and unsaturated carboxylic acids to tricarbonylchromium complexes of aryl ethers: dearomatizing cyclization to lactones. J Organomet Chem 2001. [DOI: 10.1016/s0022-328x(00)00848-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Pape AR, Kaliappan KP, Kündig EP. Transition-metal-mediated dearomatization reactions. Chem Rev 2000; 100:2917-40. [PMID: 11749310 DOI: 10.1021/cr9902852] [Citation(s) in RCA: 587] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A R Pape
- Department of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, CH-1211, Geneva, Switzerland
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20
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Pigge FC, Fang S, Rath NP. Intramolecular Addition of Stabilized Enolates to (η6-Arene)ruthenium Complexes: Synthesis of Ru-Coordinated Azaspirocycles. Org Lett 1999. [DOI: 10.1021/ol991123v] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- F. Christopher Pigge
- Department of Chemistry, University of MissouriSt. Louis, St. Louis, Missouri 63121-4499
| | - Shiyue Fang
- Department of Chemistry, University of MissouriSt. Louis, St. Louis, Missouri 63121-4499
| | - Nigam P. Rath
- Department of Chemistry, University of MissouriSt. Louis, St. Louis, Missouri 63121-4499
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Pearson AJ, Gontcharov AV. Asymmetric Conversion of Arenechromium Complexes to Functionalized Cyclohexenones: Progress toward Defining an Optimum Chiral Auxiliary. J Org Chem 1998; 63:152-162. [PMID: 11674056 DOI: 10.1021/jo971676o] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An investigation into the asymmetric synthesis of 5-substituted cyclohexenones via nucleophile addition to (alkoxyarene)chromium tricarbonyl complexes is described. Diastereoselectivity during the nucleophile addition step was achieved using alkoxy substituents derived from terpenoid substrates as chiral auxiliaries. Selectivities as high as 24:1 were obtained when 2-phenylisoborneol was used as the chiral auxiliary and as high as 17:1 using 3,3-(ethylenedioxy)isoborneol. The absolute stereochemistry of the major products was assigned by Mosher's method, after their conversion to the corresponding cyclohexenol. A study of the temperature dependence of the nucleophile addition to alkoxytoluene complexes revealed a thermodynamic preference for addition ortho to the ether substituent.
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Affiliation(s)
- Anthony J. Pearson
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106
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23
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Yeh MCP, Chuang CN, Yiu CH. Synthesis of perhydroisoquinoline derivatives mediated by (η6-arene)Cr(CO)3 complexes. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01731-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Pearson AJ, Gontcharov AV, Zhu PY. Chiral auxiliary-promoted asymmetric nucleophile additions to arene-manganese tricarbonyl complexes. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)00006-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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Schmalz HG, Schellhaas K. Kontrolle des Reaktionsverlaufes bei nucleophilen Additionen anortho-substituierte (η6-Anisol)tricarbonylchrom-Komplexe: Dienolether-Bildung versustele-Substitution. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961081828] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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26
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Natural Products Synthesis based on Novel Ring Transformation. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/b978-0-444-89558-5.50034-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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27
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Yang SS, Dawson BT, Rieke RD. Synthesis of 2,4′-disubstituted biphenyls via regioselective electrophilic and nucleophilic addition to the (η5-cyclo- hexadienylidene)2[Cr(CO)3]2 dianion. Tetrahedron Lett 1991. [DOI: 10.1016/s0040-4039(00)92701-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Uemura M, Minami T, Shinoda Y, Nishimura H, Shiro M, Hayashi Y. Regioselectivity of nucleophilic additions to (arene) chromium complexes: conformational effects of Cr(CO)3 moieties and the nature of carbanions. J Organomet Chem 1991. [DOI: 10.1016/0022-328x(91)83125-n] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Uemura M. Tricarbonyl(n6-Arene)Chromium Complexes in Organic Synthesis. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/b978-0-89232-948-9.50009-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
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30
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Nagumo S, Suemune H, Sakai K. Stereocontrolled synthesis of (±)-acorenone B based on new ring conversion. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/c39900001778] [Citation(s) in RCA: 16] [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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31
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Application of Transition Metals in Natural Product and Heterocycle Synthesis. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/978-94-009-3897-7_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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36
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Induced conformational preference via metal carbonyl complexation: 1H NMR and X-ray crystallographic studies of 4-chromanonechromium(0) tricarbonyl. J Organomet Chem 1984. [DOI: 10.1016/0022-328x(84)85009-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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39
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Pearson AJ. Diene and dienyl complexes of iron: Reactivity and synthetic utility. TRANSIT METAL CHEM 1981. [DOI: 10.1007/bf00626109] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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41
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Ficini J, Revial G, Genêt J. Acylation of ynamines by enol-lactones: A new method of stereoselective spiroannelation. Tetrahedron Lett 1981. [DOI: 10.1016/s0040-4039(01)92508-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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