1
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Qiu JK, Hao WJ, Li G, Jiang B. Oxidative Catalytic Spiroketalization Leading to Diastereoselective Synthesis of Spiro[benzofuran-2,1′-isochromene]s. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701149] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jiang-Kai Qiu
- Institute of Chemistry & BioMedical Sciences; Nanjing University; Nanjing 210023 People's Republic of China
- Department of Chemistry and Biochemistry; Texas Tech University; Lubbock, Texas 79409-1061 United States
| | - Wen-Juan Hao
- School of Chemistry and Material Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou 211116 People's Republic of China
| | - Guigen Li
- Institute of Chemistry & BioMedical Sciences; Nanjing University; Nanjing 210023 People's Republic of China
- Department of Chemistry and Biochemistry; Texas Tech University; Lubbock, Texas 79409-1061 United States
| | - Bo Jiang
- Department of Chemistry and Biochemistry; Texas Tech University; Lubbock, Texas 79409-1061 United States
- School of Chemistry and Material Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou 211116 People's Republic of China
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2
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Kim T, Jeong KH, Kim Y, Noh T, Choi J, Ham J. Three-Component One-Pot Synthesis of Unsymmetrical Diarylalkynes by Thermocontrolled Sequential Sonogashira Reactions Using Potassium Ethynyltrifluoroborate. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700110] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Taejung Kim
- Korea Institute of Science and Technology (KIST); 679 Saimdang-ro 25451 Gangneung Republic of Korea
| | - Kyu Hyuk Jeong
- Korea Institute of Science and Technology (KIST); 679 Saimdang-ro 25451 Gangneung Republic of Korea
| | - Youngseok Kim
- Korea Institute of Science and Technology (KIST); 679 Saimdang-ro 25451 Gangneung Republic of Korea
| | - Taesub Noh
- Korea Institute of Science and Technology (KIST); 679 Saimdang-ro 25451 Gangneung Republic of Korea
- Department of Chemistry; Gangneung-Wonju National University; 7 Jukheon-gil 25457 Gangneung Republic of Korea
| | - Jaeyoung Choi
- Korea Institute of Science and Technology (KIST); 679 Saimdang-ro 25451 Gangneung Republic of Korea
| | - Jungyeob Ham
- Korea Institute of Science and Technology (KIST); 679 Saimdang-ro 25451 Gangneung Republic of Korea
- Department of Biological Chemistry; University of Science and Technology (UST); Gajung-ro 217 34113 Daejeon Republic of Korea
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3
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Yoshida M, Saito K, Fujino Y, Doi T. A concise total synthesis of biologically active frutinones via tributylphosphine-catalyzed tandem acyl transfer-cyclization. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.03.073] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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4
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Peng Y, Xu XB, Xiao J, Wang YW. Nickel-mediated stereocontrolled synthesis of spiroketals via tandem cyclization–coupling of β-bromo ketals and aryl iodides. Chem Commun (Camb) 2014; 50:472-4. [DOI: 10.1039/c3cc47780k] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Wang X, Guo P, Wang X, Wang Z, Ding K. Practical Asymmetric Catalytic Synthesis of Spiroketals and Chiral Diphosphine Ligands. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300380] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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6
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Ma H, Chang W, Tsai F, Lin Y, Huang S, Liu Y, Wang Y. Intramolecular Cyclization of Arylalkynes with C‐O Bond Formation on Ruthenium Complexes. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hao‐Wei Ma
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Wei‐Chen Chang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Fu‐Yuan Tsai
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Ying‐Chih Lin
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Shou‐Ling Huang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Yi‐Hong Liu
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Yu Wang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
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7
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Wang W, Xue J, Tian T, Zhang J, Wei L, Shao J, Xie Z, Li Y. Total synthesis of (±)-δ-rubromycin. Org Lett 2013; 15:2402-5. [PMID: 23635026 DOI: 10.1021/ol400864f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Transition-metal-catalyzed spiroketalization cyclization has been performed successfully and has led to the first total synthesis of (±)-δ-rubromycin with a longest linear sequence of 18 steps from commercially available guaiacol in a 2.7% overall yield.
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Affiliation(s)
- Wenjing Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, Gansu, P. R. China
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8
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Aitken HRM, Furkert DP, Hubert JG, Wood JM, Brimble MA. Enantioselective access to benzannulated spiroketals using a chiral sulfoxide auxiliary. Org Biomol Chem 2013; 11:5147-55. [DOI: 10.1039/c3ob41065j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Butkevich AN, Corbu A, Meerpoel L, Stansfield I, Angibaud P, Bonnet P, Cossy J. Two-Step One-Pot Synthesis of Benzoannulated Spiroacetals by Suzuki–Miyaura Coupling/Acid-Catalyzed Spiroacetalization. Org Lett 2012; 14:4998-5001. [DOI: 10.1021/ol302088w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alexey N. Butkevich
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France, Janssen Research & Development, Division of Janssen-Cilag S.A., Oncology and Medicinal Chemistry, Campus de Maigremont, 27106 Val de Reuil, Cedex, France, and Janssen Research & Development, Division of Janssen Pharmaceutica N.V., Turnhoutsweg 30, 2340 Beerse, Belgium
| | - Andrei Corbu
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France, Janssen Research & Development, Division of Janssen-Cilag S.A., Oncology and Medicinal Chemistry, Campus de Maigremont, 27106 Val de Reuil, Cedex, France, and Janssen Research & Development, Division of Janssen Pharmaceutica N.V., Turnhoutsweg 30, 2340 Beerse, Belgium
| | - Lieven Meerpoel
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France, Janssen Research & Development, Division of Janssen-Cilag S.A., Oncology and Medicinal Chemistry, Campus de Maigremont, 27106 Val de Reuil, Cedex, France, and Janssen Research & Development, Division of Janssen Pharmaceutica N.V., Turnhoutsweg 30, 2340 Beerse, Belgium
| | - Ian Stansfield
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France, Janssen Research & Development, Division of Janssen-Cilag S.A., Oncology and Medicinal Chemistry, Campus de Maigremont, 27106 Val de Reuil, Cedex, France, and Janssen Research & Development, Division of Janssen Pharmaceutica N.V., Turnhoutsweg 30, 2340 Beerse, Belgium
| | - Patrick Angibaud
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France, Janssen Research & Development, Division of Janssen-Cilag S.A., Oncology and Medicinal Chemistry, Campus de Maigremont, 27106 Val de Reuil, Cedex, France, and Janssen Research & Development, Division of Janssen Pharmaceutica N.V., Turnhoutsweg 30, 2340 Beerse, Belgium
| | - Pascal Bonnet
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France, Janssen Research & Development, Division of Janssen-Cilag S.A., Oncology and Medicinal Chemistry, Campus de Maigremont, 27106 Val de Reuil, Cedex, France, and Janssen Research & Development, Division of Janssen Pharmaceutica N.V., Turnhoutsweg 30, 2340 Beerse, Belgium
| | - Janine Cossy
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France, Janssen Research & Development, Division of Janssen-Cilag S.A., Oncology and Medicinal Chemistry, Campus de Maigremont, 27106 Val de Reuil, Cedex, France, and Janssen Research & Development, Division of Janssen Pharmaceutica N.V., Turnhoutsweg 30, 2340 Beerse, Belgium
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10
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Li X, Xue J, Huang C, Li Y. Copper(I)-Catalyzed Hydroalkoxylation/Hydrogen-Bonding-Induced Asymmetric Hetero-Diels-Alder Cycloaddition Cascade: An Approach to Aromatic Spiroketals. Chem Asian J 2012; 7:903-6. [DOI: 10.1002/asia.201101056] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Indexed: 11/10/2022]
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11
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Wang X, Han Z, Wang Z, Ding K. Catalytic Asymmetric Synthesis of Aromatic Spiroketals by SpinPhox/Iridium(I)-Catalyzed Hydrogenation and Spiroketalization of α,α′-Bis(2-hydroxyarylidene) Ketones. Angew Chem Int Ed Engl 2011; 51:936-40. [DOI: 10.1002/anie.201106488] [Citation(s) in RCA: 208] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Indexed: 11/06/2022]
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12
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Wang X, Han Z, Wang Z, Ding K. Catalytic Asymmetric Synthesis of Aromatic Spiroketals by SpinPhox/Iridium(I)-Catalyzed Hydrogenation and Spiroketalization of α,α′-Bis(2-hydroxyarylidene) Ketones. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201106488] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Wu KL, Mercado EV, Pettus TRR. A Convergent Total Synthesis of (±)-γ-Rubromycin. J Am Chem Soc 2011; 133:6114-7. [DOI: 10.1021/ja1115524] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kun-Liang Wu
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - Eduardo V. Mercado
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - Thomas R. R. Pettus
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
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14
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Ho JHH, Hodgson R, Wagler J, Messerle BA. Highly efficient Rh(i) and Ir(i) single and dual metal catalysed dihydroalkoxylation reactions of alkyne diols. Dalton Trans 2010; 39:4062-9. [DOI: 10.1039/b926773e] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Tony KA, Dabideen D, Li J, Díaz-Hernández MD, Jiménez-Barbero J, Mootoo DR. Olefin metathesis-iodoetherification-dehydroiodination strategy for spiroketal subunits of polyether antibiotics. J Org Chem 2009; 74:7774-80. [PMID: 19813766 PMCID: PMC3395214 DOI: 10.1021/jo9014722] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The convergent synthesis of two pentacyclic analogues of the polyether monensin A is described. Although different with respect to the configuration of the alcohol at the 3 position of the six-membered ring of the spiroketal subunit, the configuration at the acetal center in both structures is unchanged and is consistent with the anomeric effect. The key synthetic steps are the coupling of two complex segments via an olefin metathesis, and the subsequent conversion of a dihydroxyalkene to the spiroketal through an iodoetherification-dehydroiodination sequence. The compatibility of these transformations with a variety of functional groups makes the overall strategy appropriate for highly substituted frameworks.
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Affiliation(s)
- Kurissery A. Tony
- Department of Chemistry, Hunter College/CUNY, 695 Park Avenue, New York, NY 10021
| | - Darrin Dabideen
- Department of Chemistry, Hunter College/CUNY, 695 Park Avenue, New York, NY 10021
| | - Jialiang Li
- Department of Chemistry, Hunter College/CUNY, 695 Park Avenue, New York, NY 10021
| | | | | | - David R. Mootoo
- Department of Chemistry, Hunter College/CUNY, 695 Park Avenue, New York, NY 10021
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16
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Rathwell D, Yang SH, Tsang K, Brimble M. An Efficient Formal Synthesis of the Human Telomerase Inhibitor (±)-γ-Rubromycin. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200903316] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Rathwell D, Yang SH, Tsang K, Brimble M. An Efficient Formal Synthesis of the Human Telomerase Inhibitor (±)-γ-Rubromycin. Angew Chem Int Ed Engl 2009; 48:7996-8000. [DOI: 10.1002/anie.200903316] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Choi PJ, Rathwell DC, Brimble MA. Synthesis of 6,6-bisbenzannulated spiroketals related to the rubromycins using a double intramolecular hetero-Michael addition (DIHMA). Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.02.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Tony KA, Li X, Dabideen D, Li J, Mootoo DR. An iodoetherification-dehydroiodination strategy for the synthesis of complex spiroketals from dihydroxyalkene precursors. Org Biomol Chem 2008; 6:1165-9. [PMID: 18362952 PMCID: PMC3395191 DOI: 10.1039/b719247a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dihydroxyalkenes or their monoprotected alcohol derivatives are transformed to 5,5- and 5,6-spiroketals through a sequence involving an initial iodocyclization, followed by a silver triflate mediated spiroketalization step on the derived hydroxy-iodoether.
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Affiliation(s)
- K. A. Tony
- Department of Chemistry, Hunter College/CUNY, New York, NY, 10021, USA. ; Fax: +1 212-772-5332; Tel: +1 212-772-4356
| | - Xiaohua Li
- Department of Chemistry, Hunter College/CUNY, New York, NY, 10021, USA. ; Fax: +1 212-772-5332; Tel: +1 212-772-4356
| | - Darrin Dabideen
- Department of Chemistry, Hunter College/CUNY, New York, NY, 10021, USA. ; Fax: +1 212-772-5332; Tel: +1 212-772-4356
| | - Jialiang Li
- Department of Chemistry, Hunter College/CUNY, New York, NY, 10021, USA. ; Fax: +1 212-772-5332; Tel: +1 212-772-4356
| | - David R. Mootoo
- Department of Chemistry, Hunter College/CUNY, New York, NY, 10021, USA. ; Fax: +1 212-772-5332; Tel: +1 212-772-4356
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20
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Zhou G, Zhu J, Xie Z, Li Y. An Efficient Synthesis of Highly Functionalized [5,6] Aromatic Spiroketals by Hetero-Diels−Alder Reaction. Org Lett 2008; 10:721-4. [PMID: 18266379 DOI: 10.1021/ol7029068] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guanglian Zhou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Jianrong Zhu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Zhixiang Xie
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Ying Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
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21
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Lowell AN, Fennie MW, Kozlowski MC. A Concise Synthesis of the Naphthalene Portion of Purpuromycin. J Org Chem 2008; 73:1911-8. [DOI: 10.1021/jo7024114] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew N. Lowell
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Michael W. Fennie
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Marisa C. Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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22
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Wu KL, Wilkinson S, Reich NO, Pettus TRR. Facile synthesis of naphthoquinone spiroketals by diastereoselective oxidative [3 + 2] cycloaddition. Org Lett 2007; 9:5537-40. [PMID: 18044909 PMCID: PMC2430727 DOI: 10.1021/ol702450d] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly selective oxidative [3 + 2] cycloaddition of chiral enol ethers and hydroxynaphthoquinone is described. This convergent strategy is amenable to an enantioselective synthesis of beta-rubromycin and related naphthoquinone spiroketals. Several compounds were found to inhibit DNA-polymerase and telomerase in a manner resembling alpha-rubromycin and beta-rubromycin.
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Affiliation(s)
- Kun-Liang Wu
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, California 93106-9510, USA
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23
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Akai S, Kakiguchi K, Nakamura Y, Kuriwaki I, Dohi T, Harada S, Kubo O, Morita N, Kita Y. Total synthesis of (+/-)-gamma-rubromycin on the basis of two aromatic Pummerer-type reactions. Angew Chem Int Ed Engl 2007; 46:7458-61. [PMID: 17702074 DOI: 10.1002/anie.200702382] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shuji Akai
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565-0871, Japan
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24
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Skouta R, Li CJ. Rapid syntheses of (±)-pterocarpans and isoflavones via the gold-catalyzed annulation of aldehydes and alkynes. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.09.122] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Akai S, Kakiguchi K, Nakamura Y, Kuriwaki I, Dohi T, Harada S, Kubo O, Morita N, Kita Y. Total Synthesis of (±)-γ-Rubromycin on the Basis of Two Aromatic Pummerer-Type Reactions. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200702382] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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26
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Brasholz M, Sörgel S, Azap C, Reißig H. Rubromycins: Structurally Intriguing, Biologically Valuable, Synthetically Challenging Antitumour Antibiotics. European J Org Chem 2007. [DOI: 10.1002/ejoc.200601054] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Malte Brasholz
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany, Fax: +49‐30‐838‐55367
| | - Sebastian Sörgel
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany, Fax: +49‐30‐838‐55367
| | - Cengiz Azap
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany, Fax: +49‐30‐838‐55367
| | - Hans‐Ulrich Reißig
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany, Fax: +49‐30‐838‐55367
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27
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Synthesis of aromatic spiroacetals related to γ-rubromycin based on a 3H-spiro[1-benzofuran-2,2′-chromane] skeleton. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.02.033] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Chinchilla R, Najera C. The Sonogashira Reaction: A Booming Methodology in Synthetic Organic Chemistry. Chem Rev 2007; 107:874-922. [PMID: 17305399 DOI: 10.1021/cr050992x] [Citation(s) in RCA: 2266] [Impact Index Per Article: 133.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rafael Chinchilla
- Departamento de Química Orgánica and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Facultad de Ciencias, Apartado 99, 03080 Alicante, Spain.
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29
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Sörgel S, Azap C, Reißig HU. Preparation of Highly Alkoxy-Substituted Naphthaldehyde Derivatives – A Regioselective Approach to Building Blocks for the Synthesis of Rubromycins. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600353] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Sörgel S, Azap C, Reissig HU. Synthesis of Bisbenzannulated SpiroketalsModel Studies for a Modular Approach to Rubromycins. Org Lett 2006; 8:4875-8. [PMID: 17020325 DOI: 10.1021/ol061932w] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] A highly flexible synthesis of bisbenzannulated spiroketals is described with additions of lithiated methoxyallene to aryl aldehydes and Heck reactions as key steps. Subsequent hydrogenations and ketalizations afforded the desired spiroketals in good yields and with predominating trans-configuration. With model compound 30, already bearing the fully substituted naphthyl core of rubromycins, the ketalization proceeded efficiently providing the expected product 31 and the isopropoxy compound 32. Both products are advanced model compounds of heliquinomycin.
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Affiliation(s)
- Sebastian Sörgel
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, D-14195 Berlin, Germany
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31
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Convergent route to the purpuromycin bisphenolic spiroketal: hydrogen bonding control of spiroketalization stereochemistry. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.05.044] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Waters SP, Fennie MW, Kozlowski MC. Investigation of a Convergent Route to Purpuromycin: Benzofuran Formation vs Spiroketalization. Org Lett 2006; 8:3243-6. [PMID: 16836376 DOI: 10.1021/ol061112j] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[Structure: see text] A mild and efficient [3+2] nitrile oxide/olefin cycloaddition allows coupling of the highly functionalized naphthalene and isocoumarin hemispheres of purpuromycin. A rationale of the inability of advanced keto alcohols to spirocyclize is presented based upon a systematic examination of the electronic factors present in these systems and suggests that the biosynthesis of purpuromycin does not proceed through open-chain intermediates.
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Affiliation(s)
- Stephen P Waters
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
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A facile synthesis of fused aromatic spiroacetals based on the 3,4,3′,4′-tetrahydro-2,2′-spirobis(2H-1-benzopyran) skeleton. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.04.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Zhou G, Zheng D, Da S, Xie Z, Li Y. Expeditious synthesis of the aromatic spiroketal skeleton using hetero-Diels–Alder cycloaddition. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.03.092] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
[reaction: see text] A strategy for the construction of electron deficient 5,6-aryloxy spiroketal is reported. The process should prove useful for the synthesis of natural products containing similar spiroketals. The strategy uncovers an unexpected rearrangement between ortho and para quinone spiroketals.
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Affiliation(s)
- Christopher C Lindsey
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, 93106-9510, USA
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Ahmed MG, Ahmed SA, Uddin MK, Rahman MT, Romman U, Fujio M, Tsuda Y. A facile synthesis of fused spiroketal skeleton: 2,2′-spirobi(4-aryl-7,7-dimethyl-5-oxo-5,6,7,8-tetrahydrochroman). Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.09.103] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Chapter 5.3 Five-membered ring systems: Furans and benzofurans. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s0959-6380(05)80049-2] [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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Benito JM, Rubio E, Gómez-Garcı́a M, Mellet CO, Garcı́a Fernández JM. Carbohydrate-derived spiroketals: stereoselective synthesis of di-d-fructose dianhydrides. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.05.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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