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Sobie KM, Albritton M, Yang Y, Alves MM, Roitberg A, Grenning AJ. Construction of vicinal 4°/3°-carbons via reductive Cope rearrangement. Chem Sci 2022; 13:1951-1956. [PMID: 35308853 PMCID: PMC8848919 DOI: 10.1039/d1sc06307c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 01/20/2022] [Indexed: 11/21/2022] Open
Abstract
Herein reported is a strategy for constructing vicinal 4°/3° carbons via reductive Cope rearrangement. Substrates have been designed which exhibit Cope rearrangement kinetic barriers of ∼23 kcal mol−1 with isoenergetic favorability (ΔG ∼ 0). These fluxional/shape-shifting molecules can be driven forward by chemoselective reduction to useful polyfunctionalized building blocks. Herein reported is a strategy for constructing vicinal 4°/3° carbons via reductive Cope rearrangement.![]()
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Affiliation(s)
- Kristin M Sobie
- Department of Chemistry, University of Florida PO Box 117200 Gainesville FL 32611 USA
| | - Matthew Albritton
- Department of Chemistry, University of Florida PO Box 117200 Gainesville FL 32611 USA
| | - Yinuo Yang
- Department of Chemistry, University of Florida PO Box 117200 Gainesville FL 32611 USA
| | - Mariana M Alves
- Department of Chemistry, University of Florida PO Box 117200 Gainesville FL 32611 USA
| | - Adrian Roitberg
- Department of Chemistry, University of Florida PO Box 117200 Gainesville FL 32611 USA
| | - Alexander J Grenning
- Department of Chemistry, University of Florida PO Box 117200 Gainesville FL 32611 USA
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2
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Fereyduni E, Lahtigui O, Sanders JN, Tomiczek BM, Mannchen MD, Yu RA, Houk KN, Grenning AJ. Overcoming Kinetic and Thermodynamic Challenges of Classic Cope Rearrangements. J Org Chem 2021; 86:2632-2643. [PMID: 33476142 DOI: 10.1021/acs.joc.0c02690] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Systematic evaluation of 1,5-dienes bearing 3,3-electron-withdrawing groups and 4-methylation results in the discovery of a Cope rearrangement for Meldrum's acid-containing substrates that have unexpectedly favorable kinetic and thermodynamic profiles. The protocol is quite general due to a concise and convergent synthesis from abundant starting materials. Furthermore, products with an embedded Meldrum's acid moiety are prepared, which, in turn, can yield complex amides under neutral conditions. We have now expanded the scope of the reductive Cope rearrangement, which, via chemoselective reduction, can promote thermodynamically unfavorable [3,3] sigmatropic rearrangements of 3,3-dicyano-1,5-dienes to form reduced Cope rearrangement products. The Cope rearrangement is found to be stereospecific and can yield enantioenriched building blocks when chiral, nonracemic 1,3-disubstituted allylic electrophiles are utilized. We expand further the use of Cope rearrangements for the synthesis of highly valuable building blocks for complex- and drug-like molecular synthesis.
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Affiliation(s)
- Ehsan Fereyduni
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Ouidad Lahtigui
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Jacob N Sanders
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Breanna M Tomiczek
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Michael D Mannchen
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Roland A Yu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Alexander J Grenning
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
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3
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Semenova E, Lahtigui O, Scott SK, Albritton M, Abboud KA, Ghiviriga I, Roitberg AE, Grenning AJ. Selective ring-rearrangement or ring-closing metathesis of bicyclo[3.2.1]octenes. Chem Commun (Camb) 2020; 56:11779-11782. [PMID: 32940291 DOI: 10.1039/d0cc04624h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Explored was the competitive ring-closing metathesis vs. ring-rearrangement metathesis of bicyclo[3.2.1]octenes prepared by a simple and convergent synthesis from bicyclic alkylidenemalono-nitriles and allylic electrophiles. It was uncovered that ring-closing metathesis occurs exclusively on the tetraene-variant, yielding unique, stereochemically and functionally rich polycyclic bridged frameworks, whereas the reduced version (a triene) undergoes ring-rearrangement metathesis to 5-6-5 fused ring systems resembling the isoryanodane core.
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Affiliation(s)
- Evgeniya Semenova
- Department of Chemistry, University of Florida, P. O. Box 117200, Gainesville, FL, USA.
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4
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Chen P, Li Y, Chen ZC, Du W, Chen YC. Pseudo-Stereodivergent Synthesis of Enantioenriched Tetrasubstituted Alkenes by Cascade 1,3-Oxo-Allylation/Cope Rearrangement. Angew Chem Int Ed Engl 2020; 59:7083-7088. [PMID: 32073203 DOI: 10.1002/anie.202000044] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 02/14/2020] [Indexed: 12/12/2022]
Abstract
The catalytic diastereodivergent construction of stereoisomers having two or more stereogenic centers has been extensively studied. In contrast, the switchable introduction of another stereogenic element, that is, Z/E configuration involving a polysubstituted alkene group, into the optically active stereoisomers, has not been recognized yet. Disclosed here is the pseudo-stereodivergent synthesis of highly enantioenriched tetrasubstituted alkene architectures from isatin-based Morita-Baylis-Hillman carbonates and allylic derivatives, under the cooperative catalysis of a tertiary amine and a chiral iridium complex. The success of the switchable construction of the tetrasubstituted alkene motif relies on the diastereodivergent 1,3-oxo-allylation reaction between N-allylic ylides and chiral π-allyliridium complex intermediates by ligand and substrate control, followed by the stereoselective concerted 3,3-Cope rearrangement process.
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Affiliation(s)
- Peng Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Yue Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Zhi-Chao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China.,College of Pharmacy, Third Military Medical University, Chongqing, 400038, China
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5
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Chen P, Li Y, Chen Z, Du W, Chen Y. Pseudo‐Stereodivergent Synthesis of Enantioenriched Tetrasubstituted Alkenes by Cascade 1,3‐Oxo‐Allylation/Cope Rearrangement. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Peng Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Yue Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Zhi‐Chao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Ying‐Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
- College of Pharmacy Third Military Medical University Chongqing 400038 China
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6
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Diastereoselective Synthesis of 2,3,4-Trisubstituted Tetrahydrofurans via Thermally Reactive 1,5-Diene- tert-butyl Carbonates. Org Lett 2020; 22:842-847. [PMID: 31951142 DOI: 10.1021/acs.orglett.9b04306] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report that 3,3-dicyano-1,5-dienes bearing tert-butyl carbonates can be thermally converted to 2,3,4-trisubstituted tetrahydrofurans. The transformation relies on two thermally reactive functional groups, a 1,5-diene and a tert-butyl carbonate, that react cooperatively to yield the furan scaffolds by thermal Cope rearrangement, Boc deprotection, and oxy-Michael addition. Described herein is background related to the discovery, optimization, and scope of the key transformation and representative functional group interconversion chemistry for the tetrahydrofuran scaffolds.
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7
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Vertesaljai P, Serrano R, Mannchen MD, Williams M, Semenova E, Grenning AJ. Promoting Thermodynamically Unfavorable [3,3] Rearrangements by Chemoselective Reduction. Org Lett 2019; 21:5704-5707. [PMID: 31265314 DOI: 10.1021/acs.orglett.9b02057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Herein described is a strategy for promoting thermodynamically unfavorable [3,3] Cope rearrangements. 3,3-Dicyano-1,5-dienes that are resistant to the thermal rearrangement can be promoted under reductive conditions. The reduced Cope products are versatile, bifunctional building blocks.
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Affiliation(s)
- Peter Vertesaljai
- Department of Chemistry , University of Florida , P.O. Box 117200, Gainesville , Florida 32611 , United States
| | - Roberto Serrano
- Department of Chemistry , University of Florida , P.O. Box 117200, Gainesville , Florida 32611 , United States
| | - Michael D Mannchen
- Department of Chemistry , University of Florida , P.O. Box 117200, Gainesville , Florida 32611 , United States
| | - Matthew Williams
- Department of Chemistry , University of Florida , P.O. Box 117200, Gainesville , Florida 32611 , United States
| | - Evgeniya Semenova
- Department of Chemistry , University of Florida , P.O. Box 117200, Gainesville , Florida 32611 , United States
| | - Alexander J Grenning
- Department of Chemistry , University of Florida , P.O. Box 117200, Gainesville , Florida 32611 , United States
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Schroeder R, Grenning AJ. Accessing the decarboxylative allylation–divinylcyclopropane-cycloheptadiene rearrangement from the ketone/aldehyde substrate pool. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.03.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Fereyduni E, Sanders JN, Gonzalez G, Houk KN, Grenning AJ. Transient [3,3] Cope rearrangement of 3,3-dicyano-1,5-dienes: computational analysis and 2-step synthesis of arylcycloheptanes. Chem Sci 2018; 9:8760-8764. [PMID: 30627397 PMCID: PMC6295866 DOI: 10.1039/c8sc03057j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 09/20/2018] [Indexed: 12/20/2022] Open
Abstract
A simple and modular route to arylcycloheptene scaffolds is reported. The two-step route from Knoevenagel adducts and allylic electrophiles is made possible through the design of a Cope rearrangement that utilizes a "traceless" activating group to promote an otherwise thermodynamically unfavorable transformation. Experimentally, the [3,3] rearrangement occurrs transiently at room temperature with a computed barrier of 19.5 kcal mol-1, which ultimately allows for three-component bis-allylation. Ring-closing metathesis delivers the arylcycloheptane and removes the activating group. This report describes the design and optimization of the methodology, scope and mechanistic studies, and computational analysis.
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Affiliation(s)
- Ehsan Fereyduni
- Department of Chemistry , University of Florida , P.O. Box 117200 , Gainesville , FL 32611 , USA .
| | - Jacob N Sanders
- Department of Chemistry and Biochemistry , University of California - Los Angeles , 607 Charles E. Young Drive East, Box 951569 , Los Angeles , CA 90095-1569 , USA .
| | - Gabriel Gonzalez
- Department of Chemistry , University of Florida , P.O. Box 117200 , Gainesville , FL 32611 , USA .
| | - K N Houk
- Department of Chemistry and Biochemistry , University of California - Los Angeles , 607 Charles E. Young Drive East, Box 951569 , Los Angeles , CA 90095-1569 , USA .
| | - Alexander J Grenning
- Department of Chemistry , University of Florida , P.O. Box 117200 , Gainesville , FL 32611 , USA .
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10
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2017. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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11
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Vertesaljai P, Ghiviriga I, Grenning AJ. Complex Hydroindoles by an Intramolecular Nitrile-Intercepted Allylic Alkylation Cascade Reaction. Org Lett 2018; 20:1970-1973. [DOI: 10.1021/acs.orglett.8b00499] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter Vertesaljai
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Alexander J. Grenning
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
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