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Buntine J, Dasgupta S, Dorney K, Rubinstein O, Salimimarand M, White JM, Rizzacasa MA. Total Synthesis of Icumazole A Using a Modified Cadiot-Chodkiewicz Coupling. Org Lett 2024; 26:1062-1066. [PMID: 38285532 DOI: 10.1021/acs.orglett.3c04268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
The first total synthesis of myxobacteria metabolite icumazole A (1) is reported. Key steps in the route include an organocatalyzed asymmetric self-aldol reaction followed by an acetate aldol reaction to form the stereotriad present in the oxazole moiety, an intramolecular Diels-Alder reaction to form the isochromanone, and an acetylide addition and selective methylation. The final steps involved a high-yielding modified Cadiot-Chodkiewicz coupling and stereoselective reduction to secure the Z,Z-diene and afford 1.
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Affiliation(s)
- Jack Buntine
- School of Chemistry, The Bio21 Institute, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Samrat Dasgupta
- School of Chemistry, The Bio21 Institute, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Keely Dorney
- School of Chemistry, The Bio21 Institute, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Oscar Rubinstein
- School of Chemistry, The Bio21 Institute, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Mina Salimimarand
- School of Chemistry, The Bio21 Institute, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Jonathan M White
- School of Chemistry, The Bio21 Institute, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Mark A Rizzacasa
- School of Chemistry, The Bio21 Institute, The University of Melbourne, Melbourne, Victoria 3010, Australia
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2
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Magano J. Large-Scale Amidations in Process Chemistry: Practical Considerations for Reagent Selection and Reaction Execution. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00005] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Javier Magano
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
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3
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Solomin VV, Radchenko DS, Slobodyanyuk EY, Geraschenko OV, Vashchenko BV, Grygorenko OO. Widely Exploited, Yet Unreported: Regiocontrolled Synthesis and the Suzuki-Miyaura Reactions of Bromooxazole Building Blocks. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Vitalii V. Solomin
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
| | - Dmytro S. Radchenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Taras Shevchenko National University of Kyiv; Ukraine
| | - Evgeniy Y. Slobodyanyuk
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Institute of Organic Chemistry; National Academy of Sciences of Ukraine, Murmanska Street 5, Kyiv 02660; Ukraine
| | - Oleksandr V. Geraschenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
| | - Bohdan V. Vashchenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Taras Shevchenko National University of Kyiv; Ukraine
| | - Oleksandr O. Grygorenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Taras Shevchenko National University of Kyiv; Ukraine
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4
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Vrijdag JL, De Ruysscher D, De Borggraeve WM. Towards New Tricyclic Motifs: Intramolecular C-H Arylation as the Key Step in a Formal [3+3] Cyclocondensation Strategy. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Johannes L. Vrijdag
- Department of Chemistry; University of Leuven; Celestijnenlaan 200F box 2404 3001 Heverlee Belgium
| | - Dries De Ruysscher
- Department of Chemistry; University of Leuven; Celestijnenlaan 200F box 2404 3001 Heverlee Belgium
| | - Wim M. De Borggraeve
- Department of Chemistry; University of Leuven; Celestijnenlaan 200F box 2404 3001 Heverlee Belgium
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5
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Bailey CL, Joh AY, Hurley ZQ, Anderson CL, Singaram B. Controlled Reduction of Tertiary Amides to the Corresponding Alcohols, Aldehydes, or Amines Using Dialkylboranes and Aminoborohydride Reagents. J Org Chem 2016; 81:3619-28. [DOI: 10.1021/acs.joc.6b00276] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christopher L. Bailey
- Department of Chemistry and
Biochemistry, University of California, Santa Cruz, 1156 High
Street, Santa Cruz, California 95064, United States
| | - Alexander Y. Joh
- Department of Chemistry and
Biochemistry, University of California, Santa Cruz, 1156 High
Street, Santa Cruz, California 95064, United States
| | - Zefan Q. Hurley
- Department of Chemistry and
Biochemistry, University of California, Santa Cruz, 1156 High
Street, Santa Cruz, California 95064, United States
| | - Christopher L. Anderson
- Department of Chemistry and
Biochemistry, University of California, Santa Cruz, 1156 High
Street, Santa Cruz, California 95064, United States
| | - Bakthan Singaram
- Department of Chemistry and
Biochemistry, University of California, Santa Cruz, 1156 High
Street, Santa Cruz, California 95064, United States
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6
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Dunetz JR, Magano J, Weisenburger GA. Large-Scale Applications of Amide Coupling Reagents for the Synthesis of Pharmaceuticals. Org Process Res Dev 2016. [DOI: 10.1021/op500305s] [Citation(s) in RCA: 411] [Impact Index Per Article: 51.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Joshua R. Dunetz
- Process
Chemistry, Gilead Sciences, 333 Lakeside Drive, Foster City, California 94404, United States
| | - Javier Magano
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Gerald A. Weisenburger
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
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7
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Bender T, Loits D, White JM, Rizzacasa MA. Synthesis of the C1–C18 Fragment of Rhizopodin: Late-State Introduction of the Oxazole. Org Lett 2014; 16:1450-3. [DOI: 10.1021/ol500261n] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Tobias Bender
- School of Chemistry, The
Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
| | - Darran Loits
- School of Chemistry, The
Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
| | - Jonathan M. White
- School of Chemistry, The
Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
| | - Mark A. Rizzacasa
- School of Chemistry, The
Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
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8
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Analysis of the flavonoid component of bioactive New Zealand mānuka (Leptospermum scoparium) honey and the isolation, characterisation and synthesis of an unusual pyrrole. Food Chem 2013; 141:1772-81. [PMID: 23870890 DOI: 10.1016/j.foodchem.2013.04.092] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 03/24/2013] [Accepted: 04/30/2013] [Indexed: 11/24/2022]
Abstract
The flavonoid components of New Zealand mānuka (Leptospermum scoparium) honey have been quantified in a series of 31 honeys of varying non-peroxide antibacterial activity to clarify discrepancies between previous studies reported in the literature. Total flavonoid content was 1.16 mg/100 g honey. The principal flavonoids present were pinobanksin, pinocembrin, luteolin and chrysin and together these represented 61% of the total flavonoid content. 1, 2-formyl-5-(2-methoxyphenyl)-pyrrole, which was weakly correlated with the non-peroxide antibacterial activity, was isolated from the flavonoid fraction and separately synthesised. 1 did not display inhibitory activity against Staphylococcus aureus in vitro and thus the origin of the correlation, which is still unknown, is not a direct contribution.
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9
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Magano J, Dunetz JR. Large-Scale Carbonyl Reductions in the Pharmaceutical Industry. Org Process Res Dev 2012. [DOI: 10.1021/op2003826] [Citation(s) in RCA: 292] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Javier Magano
- Chemical Research and Development, Pharmaceutical Sciences, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Joshua R. Dunetz
- Chemical Research and Development, Pharmaceutical Sciences, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
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10
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Hobson SJ, Parkin A, Marquez R. Oxidative Rearrangements of Isobenzofurans: Studies toward the Synthesis of the Ajudazols. Org Lett 2008; 10:2813-6. [DOI: 10.1021/ol8009336] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stephen J. Hobson
- WestCHEM, University of Glasgow, Joseph Black Building, University Avenue, Glasgow G12 8QQ, U.K
| | - Andrew Parkin
- WestCHEM, University of Glasgow, Joseph Black Building, University Avenue, Glasgow G12 8QQ, U.K
| | - Rodolfo Marquez
- WestCHEM, University of Glasgow, Joseph Black Building, University Avenue, Glasgow G12 8QQ, U.K
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