1
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Chen T, Liu W, Gu W, Niu S, Lan S, Zhao Z, Gong F, Liu J, Yang S, Cotman AE, Song J, Fang X. Dynamic Kinetic Resolution of β-Substituted α-Diketones via Asymmetric Transfer Hydrogenation. J Am Chem Soc 2023; 145:585-599. [PMID: 36563320 DOI: 10.1021/jacs.2c11149] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Developing innovative dynamic kinetic resolution (DKR) modes and achieving the highly regio- and enantioselective semihydrogenation of unsymmetrical α-diketones are two formidable challenges in the field of contemporary asymmetric (transfer) hydrogenation. In this work, we report the highly regio- and stereoselective asymmetric semi-transfer hydrogenation of unsymmetrical α-diketones through a unique DKR mode, which features the reduction of the carbonyl group distal from the labile stereocenter, while the proximal carbonyl remains untouched. Moreover, the protocol affords a variety of enantioenriched acyclic ketones with α-hydroxy-α'-C(sp2)-functional groups, which represent a new product class that has not been furnished in known arts. The utilities of the products have been demonstrated in a series of further transformations including the rapid synthesis of drug molecules. Density functional theory calculations and plenty of control experiments have also been conducted to gain more mechanistic insights into the highly selective semihydrogenation.
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Affiliation(s)
- Ting Chen
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Wenjun Liu
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Wei Gu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Shengtong Niu
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Shouang Lan
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Zhifei Zhao
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Fan Gong
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Jinggong Liu
- Orthopedics Department, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou 510120, China
| | - Shuang Yang
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Andrej Emanuel Cotman
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva cesta 7, Ljubljana SI-1000, Slovenia
| | - Jinshuai Song
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Xinqiang Fang
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
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2
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Balas L, Dey SK, Béraud-Dufour S, Riechers DE, Landau OA, Bertrand-Michel J, Durand T, Blondeau N. Linotrins: Omega-3 oxylipins featuring an E,Z,E conjugated triene motif are present in the plant kingdom and alleviate inflammation in LPS-challenged microglial cells. Eur J Med Chem 2022; 231:114157. [DOI: 10.1016/j.ejmech.2022.114157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 01/18/2022] [Accepted: 01/24/2022] [Indexed: 11/04/2022]
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3
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Liu J, Skaria M, Sharma P, Chiang YW, Liu RS. Ground-state dioxygen undergoes metal-free [3 + 2]-annulations with allenes and nitrosoarenes under ambient conditions. Chem Sci 2017; 8:5482-5487. [PMID: 28970928 PMCID: PMC5613744 DOI: 10.1039/c7sc01770g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 05/20/2017] [Indexed: 11/21/2022] Open
Abstract
The cycloadditions of molecular dioxygen with neutral π-bond motifs rely heavily on singlet-state 1O2, whereas ground state 3O2 is chemically inactive. Here we report novel [3 + 2]-annulations among ground-state 3O2 (1 bar), allenes, and nitrosoarenes at low temperatures, efficiently yielding dioxygen-containing oxacycles. With less hindered 1-arylallene derivatives, these dioxygen species undergo skeletal rearrangement to 3-hydroxy-1-ketonyl-2-imine oxides. These cycloadditions represent valuable one-pot O,N,O-trifunctionalizations of allenes. Our EPR experiments confirm the presence of 1,4-diradical intermediates from an allene/nitrosoarene mixture, which manifest the hidden diradical properties of nitrosoarenes.
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Affiliation(s)
- Jinxian Liu
- Department of Chemistry , National Tsing-Hua University , Hsinchu , Taiwan , Republic of China . .,College of Chemistry & Materials Science , Longyan University , Fujian , China
| | - Manisha Skaria
- Department of Chemistry , National Tsing-Hua University , Hsinchu , Taiwan , Republic of China .
| | - Pankaj Sharma
- Department of Chemistry , National Tsing-Hua University , Hsinchu , Taiwan , Republic of China .
| | - Yun-Wei Chiang
- Department of Chemistry , National Tsing-Hua University , Hsinchu , Taiwan , Republic of China .
| | - Rai-Shung Liu
- Department of Chemistry , National Tsing-Hua University , Hsinchu , Taiwan , Republic of China .
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4
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Saeed A, Larik FA, Lal B, Faisal M, El-Seedi H, Channar PA. Recent resurgence toward the oxidation of heteroatoms using dimethyldioxirane as an exquisite oxidant. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1291816] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Aamer Saeed
- Department of Chemistry, Quaid-I-Azam University, Islamabad, Pakistan
| | - Fayaz Ali Larik
- Department of Chemistry, Quaid-I-Azam University, Islamabad, Pakistan
| | - Bhajan Lal
- Department of Energy Systems Engineering, Sukkur Institute of Business Administration, Sukkur, Pakistan
| | - Muhammad Faisal
- Department of Chemistry, Quaid-I-Azam University, Islamabad, Pakistan
| | - Hesham El-Seedi
- Division of Pharmacognosy, Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
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5
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Yu L, Wang H, Akhmedov NG, Sowa C, Liu K, Kim H, Williams L. Direct Entry to 4,10-Didesmethyl (9S)-Dihydroerythronolide A via Catalytic Allene Osmylation. Org Lett 2016; 18:2868-71. [DOI: 10.1021/acs.orglett.6b01151] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Libing Yu
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Huan Wang
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Novruz G. Akhmedov
- Department
of Chemistry, West Virginia University, 406 Clark Hall, Prospect Street, Morgantown, West Virginia 26506, United States
| | - Christopher Sowa
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Kai Liu
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Hiyun Kim
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Lawrence Williams
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
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6
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Adams CS, Grigg RD, Schomaker JM. Complete stereodivergence in the synthesis of 2-amino-1,3-diols from allenes. Chem Sci 2014. [DOI: 10.1039/c4sc01214c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Herein, we describe studies to understand how both reagent and substrate control can be effectively employed in the stereodivergent oxidative amination of allenes, with transfer of the axial chirality of an enantioenriched precursor to point chirality in each possible diastereomeric 2-amino-1,3-diol product.
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Affiliation(s)
| | - R. David Grigg
- Department of Chemistry
- University of Wisconsin
- Madison, USA
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7
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Adams CS, Weatherly CD, Burke EG, Schomaker JM. The conversion of allenes to strained three-membered heterocycles. Chem Soc Rev 2014; 43:3136-63. [DOI: 10.1039/c3cs60416k] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The addition of heteroatoms to an allenic double bond yields strained heterocycles that serve as scaffolds for further useful transformations.
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Affiliation(s)
- C. S. Adams
- Department of Chemistry
- University of Wisconsin
- Madison, USA
| | | | - E. G. Burke
- Department of Chemistry
- University of Wisconsin
- Madison, USA
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8
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Kumar Bejjanki N, Venkatesham A, Balraju K, Nagaiah K. First Stereoselective Total Synthesis of Oplopandiol. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201200572] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Affiliation(s)
- Rojita Sharma
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Lawrence J. Williams
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
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10
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Mikula H, Svatunek D, Lumpi D, Glöcklhofer F, Hametner C, Fröhlich J. Practical and Efficient Large-Scale Preparation of Dimethyldioxirane. Org Process Res Dev 2013. [DOI: 10.1021/op300338q] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hannes Mikula
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163,
1060 Vienna, Austria
| | - Dennis Svatunek
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163,
1060 Vienna, Austria
| | - Daniel Lumpi
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163,
1060 Vienna, Austria
| | - Florian Glöcklhofer
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163,
1060 Vienna, Austria
| | - Christian Hametner
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163,
1060 Vienna, Austria
| | - Johannes Fröhlich
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163,
1060 Vienna, Austria
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11
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Adams CS, Boralsky LA, Guzei IA, Schomaker JM. Modular functionalization of allenes to aminated stereotriads. J Am Chem Soc 2012; 134:10807-10. [PMID: 22708990 PMCID: PMC4476975 DOI: 10.1021/ja304859w] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nitrogen-containing stereotriads, compounds with three adjacent stereodefined carbons, are commonly found in biologically important molecules. However, the preparation of molecules bearing these motifs can be challenging. Herein, we describe a modular oxidation protocol which converts a substituted allene to a triply functionalized amine of the form C-X/C-N/C-Y. The key step employs a Rh-catalyzed intramolecular conversion of the allene to a strained bicyclic methylene aziridine. This reactive intermediate is further elaborated to the target products, often in one reaction vessel and with effective transfer of the axial chirality of the allene to point chirality in the stereotriad.
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Affiliation(s)
| | - Luke A. Boralsky
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin, 53706
| | - Ilia A. Guzei
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin, 53706
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12
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Chernyak D, Gevorgyan V. ORGANOCOPPER-MEDIATED TWO-COMPONENT SN2'-SUBSTITUTION CASCADE TOWARDS N-FUSED HETEROCYCLES. Chem Heterocycl Compd (N Y) 2012; 47:1516-1526. [PMID: 24501430 DOI: 10.1007/s10593-012-0942-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Organocuprates efficiently undergo reaction with heterocyclic propargyl mesylates at low temperature to produce N-fused heterocycles. The copper reagent plays a "double duty" in this cascade transformation, which proceeds through an SN2'-substitution followed by a consequent cycloisomerization step.
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Affiliation(s)
- D Chernyak
- University of Illinois at Chicago, 845 West Taylor St., Chicago 60607, Illinois, USA
| | - V Gevorgyan
- University of Illinois at Chicago, 845 West Taylor St., Chicago 60607, Illinois, USA
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13
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Malona JA, Cariou K, Spencer WT, Frontier AJ. Total synthesis of (±)-rocaglamide via oxidation-initiated Nazarov cyclization. J Org Chem 2012; 77:1891-908. [PMID: 22283818 DOI: 10.1021/jo202366c] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
This article describes the evolution of a Nazarov cyclization-based synthetic strategy targeting the anticancer, antiinflammatory, and insecticidal natural product (±)-rocaglamide. Initial pursuit of a polarized heteroaromatic Nazarov cyclization to construct the congested cyclopentane core revealed an unanticipated electronic bias in the pentadienyl cation. This reactivity was harnessed in a successful second-generation approach using an oxidation-initiated Nazarov cyclization of a heteroaryl alkoxyallene. Full details of these two approaches are given, as well as the characterization of undesired reaction pathways available to the Nazarov cyclization product. A sequence of experiments that led to an understanding of the unexpected reactivity of this key intermediate is described, which culminated in the successful total synthesis of (+)-rocaglamide.
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Affiliation(s)
- John A Malona
- Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
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14
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Allenes in Catalytic Asymmetric Synthesis and Natural Product Syntheses. Angew Chem Int Ed Engl 2012; 51:3074-112. [DOI: 10.1002/anie.201101460] [Citation(s) in RCA: 758] [Impact Index Per Article: 63.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Indexed: 02/06/2023]
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15
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Yu S, Ma S. Allene in katalytischer asymmetrischer Synthese und Naturstoffsynthese. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201101460] [Citation(s) in RCA: 254] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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16
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Liu K, Kim H, Ghosh P, Akhmedov NG, Williams LJ. Direct entry to erythronolides via a cyclic bis[allene]. J Am Chem Soc 2011; 133:14968-71. [PMID: 21894913 PMCID: PMC3235949 DOI: 10.1021/ja207496p] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The complexity and low tractability of antibiotic macrolides pose serious challenges to addressing the problem of resistance through semi- or total synthesis. Here we describe a new strategy involving the preparation of a complex yet tractable macrocycle and the transformation of this macrocycle into a range of erythronolide congeners. These compounds represent valuable sectors of erythromycinoid structure space and constitute intermediates with the potential to provide further purchase in this space. The routes are short. The erythronolides were prepared in three or fewer steps from the macrocycle, which was prepared in a longest linear sequence of 11 steps.
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Affiliation(s)
- Kai Liu
- Department of Chemistry, Rutgers, The State University of New Jersey, 610 Taylor Rd, Piscataway, NJ 08854
| | - Hiyun Kim
- Department of Chemistry, Rutgers, The State University of New Jersey, 610 Taylor Rd, Piscataway, NJ 08854
| | - Partha Ghosh
- Department of Chemistry, Rutgers, The State University of New Jersey, 610 Taylor Rd, Piscataway, NJ 08854
| | - Novruz G. Akhmedov
- Department of Chemistry, West Virginia University, 406 Clark Hall, Prospect Street, Morgantown, WV 26506
| | - Lawrence J. Williams
- Department of Chemistry, Rutgers, The State University of New Jersey, 610 Taylor Rd, Piscataway, NJ 08854
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17
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Xu D, Drahl MA, Williams LJ. Toward an integrated route to the vernonia allenes and related sesquiterpenoids. Beilstein J Org Chem 2011; 7:937-43. [PMID: 21804888 PMCID: PMC3135329 DOI: 10.3762/bjoc.7.104] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 06/09/2011] [Indexed: 11/23/2022] Open
Abstract
The synthesis of a model endocyclic allene related to the vernonia allenes is described. Fragmentation of a suitable decalin derivative gave the simplified germacrane scaffold. Computational analysis of this and related substrates provides insight into the stereoelectronic requirements of C-C fragmentation. The overall strategy to access these and other sesquiterpenes and the key steps in the present sequence are also discussed.
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Affiliation(s)
- Da Xu
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, NJ 08854, USA
| | - Michael A Drahl
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, NJ 08854, USA
| | - Lawrence J Williams
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, NJ 08854, USA
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18
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Sharma R, Manpadi M, Zhang Y, Kim H, Ahkmedov NG, Williams LJ. Spirodiepoxide-based cascades: direct access to diverse motifs. Org Lett 2011; 13:3352-5. [PMID: 21648404 DOI: 10.1021/ol201101e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Allene epoxide formation/opening reaction sequences enabled direct access to diverse products. Described here are a single flask procedure for allene preparation and allene oxidation/derivatization reactions that give, among others, diendiol, diyndiol, α'-hydroxy-γ-enone, dihydrofuranone, butenolide, and δ-lactone products.
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Affiliation(s)
- Rojita Sharma
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
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19
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Boralsky LA, Marston D, Grigg RD, Hershberger JC, Schomaker JM. Allene functionalization via bicyclic methylene aziridines. Org Lett 2011; 13:1924-7. [PMID: 21438516 DOI: 10.1021/ol2002418] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The oxidative functionalization of olefins is a common method for the formation of vicinal carbon-heteroatom bonds. However, oxidative methods to transform allenes into synthetic motifs containing three contiguous carbon-heteroatom bonds are much less developed. This paper describes the use of bicyclic methylene aziridines (MAs), prepared via intramolecular allene aziridination, as scaffolds for functionalization of all three allene carbons.
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Affiliation(s)
- Luke A Boralsky
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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20
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Cordier P, Aubert C, Malacria M, Gandon V, Lacôte E. Oxidation of alpha-alkoxy allenes into alpha'-alkoxy enones. Chemistry 2011; 16:9973-6. [PMID: 20645348 DOI: 10.1002/chem.201000914] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Pierre Cordier
- UPMC Univ Paris 06, IPCM UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
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21
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Joyasawal S, Lotesta SD, Akhmedov NG, Williams LJ. Spirodiepoxide strategy to the C ring of pectenotoxin 4: synthesis of the C1-C19 sector. Org Lett 2010; 12:988-91. [PMID: 20121257 DOI: 10.1021/ol902984e] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of a C1-C19 precursor to pectenotoxin 4 is presented. The strategy employed the functionalized allene shown. Key features include: olefin metathesis of two simple fragments to prepare the left portion of the allene-precursor, diastereoselective propargylation of an epoxy aldehyde to form the right portion, use of the DMDO-stable m-fluorobenzyl ether, and an allene spirodiepoxidation/C-ring formation cascade.
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Affiliation(s)
- Sipak Joyasawal
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
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22
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Zhang Y, Cusick JR, Ghosh P, Shangguan N, Katukojvala S, Inghrim J, Emge TJ, Williams LJ. Spirodiepoxides: synthesis of epoxomicinoids. J Org Chem 2009; 74:7707-14. [PMID: 19761213 DOI: 10.1021/jo901320f] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three closely related analogues of epoxomicin have been synthesized. Allene-derived spirodiepoxides were key intermediates. Spirodiepoxide formation and stereochemical dependence on solvent, oxidant, and allene structure were cataloged. The facial selectivity of the first epoxidation of 1,3-disubstituted and trisubstituted allenes was found to be >20:1 with dimethyldioxirane in chloroform. For stereogenic allenes, the facial selectivity of the second oxidation is dependent primarily on allene structure and secondarily on solvent and oxidant. For the acyclic systems evaluated this ratio was as high as 8:1. A conformational model is advanced to account for these observations.
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Affiliation(s)
- Yue Zhang
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, USA
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23
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Ghosh P, Zhang Y, Emge TJ, Williams LJ. Modeling a macrocyclic bis[spirodiepoxide] strategy to erythronolide A. Org Lett 2009; 11:4402-5. [PMID: 19725523 DOI: 10.1021/ol901755a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise route to functionalized 14-membered macrolides related to erythronolide A was achieved. Key steps include the simultaneous formation of bis[allenic] substrates, efficient macrolactonization, highly stereoselective oxidation to the corresponding bis[spirodiepoxide], and nucleophilic spirodiepoxide opening. The structure and reactivity of these macrolides, and the strategy that led to their evaluation, are discussed.
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Affiliation(s)
- Partha Ghosh
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, USA
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24
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Ghosh P, Cusick JR, Inghrim J, Williams LJ. Silyl-substituted spirodiepoxides: stereoselective formation and regioselective opening. Org Lett 2009; 11:4672-5. [PMID: 19810767 PMCID: PMC3047402 DOI: 10.1021/ol901948d] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A short synthesis of the natural product epi-citreodiol and the method developed to gain access to this target are described. Key advances focus on silyl substituted allenes. Upon exposure to dimethyldioxirane, spirodiepoxides form with high face selectivity and subsequently react at the silyl terminus.
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Affiliation(s)
| | | | - Jennifer Inghrim
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903
| | - Lawrence J. Williams
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903
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25
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Duffy RJ, Morris KA, Romo D. Synthesis of Unusually Strained Spiro Ring Systems and Their Exploits in Synthesis. Tetrahedron 2009; 65:5879-5892. [PMID: 20640036 DOI: 10.1016/j.tet.2008.06.090] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Richard J Duffy
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX 7784
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26
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Sarabia F, Martín-Gálvez F, García-Castro M, Chammaa S, Sánchez-Ruiz A, Tejón-Blanco JF. Epoxyamide-Based Strategy for the Synthesis of Polypropionate-Type Frameworks. J Org Chem 2008; 73:8979-86. [DOI: 10.1021/jo801728s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Francisco Sarabia
- Department of Biochemistry, Molecular Biology and Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos, 29071, Malaga, Spain
| | - Francisca Martín-Gálvez
- Department of Biochemistry, Molecular Biology and Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos, 29071, Malaga, Spain
| | - Miguel García-Castro
- Department of Biochemistry, Molecular Biology and Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos, 29071, Malaga, Spain
| | - Samy Chammaa
- Department of Biochemistry, Molecular Biology and Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos, 29071, Malaga, Spain
| | - Antonio Sánchez-Ruiz
- Department of Biochemistry, Molecular Biology and Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos, 29071, Malaga, Spain
| | - José F. Tejón-Blanco
- Department of Biochemistry, Molecular Biology and Organic Chemistry, Faculty of Sciences, University of Malaga, Campus de Teatinos, 29071, Malaga, Spain
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27
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Chernyak D, Gadamsetty SB, Gevorgyan V. Low temperature organocopper-mediated two-component cross coupling/cycloisomerization approach toward N-fused heterocycles. Org Lett 2008; 10:2307-10. [PMID: 18461954 DOI: 10.1021/ol8008705] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Organocopper reagents smoothly react with heterocyclic propargyl mesylates at low temperature to produce N-fused heterocycles. The copper reagent plays a "double duty" in this novel cascade transformation, which proceeds via an SN2' substitution followed by a subsequent cycloisomerization step.
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Affiliation(s)
- Dmitri Chernyak
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607-7061, USA
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28
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Lotesta SD, Kiren S, Sauers RR, Williams LJ. Spirodiepoxides: heterocycle synthesis and mechanistic insight. Angew Chem Int Ed Engl 2008; 46:7108-11. [PMID: 17691095 DOI: 10.1002/anie.200701401] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Stephen D Lotesta
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
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29
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Lotesta S, Kiren S, Sauers R, Williams L. Spirodiepoxides: Heterocycle Synthesis and Mechanistic Insight. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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