1
|
Dehnert BW, Dworkin JH, Kwon O. Dealkenylative Functionalizations: Conversion of Alkene C(sp 3)-C(sp 2) Bonds into C(sp 3)-X Bonds via Redox-Based Radical Processes. SYNTHESIS-STUTTGART 2024; 56:71-86. [PMID: 38832211 PMCID: PMC11147281 DOI: 10.1055/a-2044-4571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
This review highlights the history and recent advances in dealkenylative functionalization. Through this deconstructive strategy, radical functionalizations occur under mild, robust conditions. The reactions described proceed with high efficiency, good stereoselectivity, tolerate many functional groups, and are completed within a matter of minutes. By cleaving the C(sp3)-C(sp2) bond of terpenes and terpenoid-derived precursors, rapid diversification of natural products is possible.
Collapse
Affiliation(s)
- Brady W Dehnert
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, CA 90095, USA
| | - Jeremy H Dworkin
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, CA 90095, USA
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, CA 90095, USA
| |
Collapse
|
2
|
Li SY, Feng YM, Zhou Y, Liao CC, Su L, Liu D, Li HM, Li RT. Pogocablenes A-O, fifteen undescribed sesquiterpenoids with structural diversity from Pogostemon cablin. PHYTOCHEMISTRY 2023; 214:113829. [PMID: 37597718 DOI: 10.1016/j.phytochem.2023.113829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 08/16/2023] [Accepted: 08/17/2023] [Indexed: 08/21/2023]
Abstract
Fifteen previously undescribed sesquiterpenoids (pogocablenes A-O), three first discovered natural patchoulol-type ones, coupled with fourteen known ones, were isolated from the aerial parts of Pogostemon cablin. Among them, pogocablenes A and B, a pair of C2 epimers, possessed an unusual carbon skeleton with bicyclo[4.3.1]decane core. Pogocablene C, originated from eudesmane-type sesquiterpenoid, had an unprecedented bicyclo[5.4.0]undecane scaffold with a peroxy hemiactetal moiety. Pogocablene D possessed a rare tricyclo[5.2.2.01,5]undecane carbon skeleton derived from guaiane-type sesquiterpenoid. Pogocablene E was a 4,5-seco-guaiane derivative owning a peroxy hemiactetal unit and a spirocyclic skeleton. Pogocablene M was a nor-patchoulol-type sesquiterpenoid with α,β-unsaturated ketone moiety. Their structures with absolute configuration were determined by extensive spectroscopic analysis, in combination with quantum chemical calculation. In addition, the plausible biogenetic pathways of pogocablenes A-E were proposed. Furthermore, all isolates were evaluated for anti-influenza virus and anti-inflammatory effects.
Collapse
Affiliation(s)
- Shu-Yi Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, PR China
| | - Yu-Mei Feng
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, PR China
| | - Yan Zhou
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, PR China
| | - Cai-Cen Liao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, PR China
| | - Lu Su
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, PR China
| | - Dan Liu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, PR China
| | - Hong-Mei Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, PR China.
| | - Rong-Tao Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, PR China.
| |
Collapse
|
3
|
He Z, Moreno JA, Swain M, Wu J, Kwon O. Aminodealkenylation: Ozonolysis and copper catalysis convert C(sp 3)-C(sp 2) bonds to C(sp 3)-N bonds. Science 2023; 381:877-886. [PMID: 37616345 PMCID: PMC10753956 DOI: 10.1126/science.adi4758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 07/25/2023] [Indexed: 08/26/2023]
Abstract
Great efforts have been directed toward alkene π bond amination. In contrast, analogous functionalization of the adjacent C(sp3)-C(sp2) σ bonds is much rarer. Here we report how ozonolysis and copper catalysis under mild reaction conditions enable alkene C(sp3)-C(sp2) σ bond-rupturing cross-coupling reactions for the construction of new C(sp3)-N bonds. We have used this unconventional transformation for late-stage modification of hormones, pharmaceutical reagents, peptides, and nucleosides. Furthermore, we have coupled abundantly available terpenes and terpenoids with nitrogen nucleophiles to access artificial terpenoid alkaloids and complex chiral amines. In addition, we applied a commodity chemical, α-methylstyrene, as a methylation reagent to prepare methylated nucleosides directly from canonical nucleosides in one synthetic step. Our mechanistic investigation implicates an unusual copper ion pair cooperative process.
Collapse
Affiliation(s)
- Zhiqi He
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095-1569, USA
| | - Jose Antonio Moreno
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095-1569, USA
| | - Manisha Swain
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095-1569, USA
| | - Jason Wu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095-1569, USA
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095-1569, USA
| |
Collapse
|
4
|
Kaiser M, Schönbauer D, Schragl K, Weil M, Gaertner P, Enev VS. Efforts toward the Total Synthesis of Elisabethin A. J Org Chem 2022; 87:15333-15349. [PMID: 36283031 PMCID: PMC9680034 DOI: 10.1021/acs.joc.2c01914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We describe our efforts toward the total synthesis of the natural product elisabethin A. The first route was guided by the proposed biosynthesis, assembling the 6,6-ring system before forming the five-membered ring including the quaternary carbon. The second approach includes a high yielding cyclization under Mitsunobu conditions as a key step. It allowed the preparation of an unusual and highly functionalized bicyclic 6,5-spiro compound. Both routes share a common advanced precursor obtained from an "underdeveloped" Claisen rearrangement of an aryl dienyl ether.
Collapse
Affiliation(s)
- Maximilian Kaiser
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria,
| | - David Schönbauer
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria
| | - Katharina Schragl
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria
| | - Matthias Weil
- Institute
of Chemical Technologies and Analytics, TU Wien, Getreidemarkt
9/164, 1060Wien, Austria
| | - Peter Gaertner
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria
| | - Valentin S. Enev
- Institute
of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060Wien, Austria,
| |
Collapse
|
5
|
Kotha S, Gaikwad V. Synthesis of Unusual Amino Acid Derivatives Containing Bicyclo[2.2.2]octane Unit by the Diels‐Alder Approach Involving Pentacene. ChemistrySelect 2022. [DOI: 10.1002/slct.202201114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry Indian Institute of Technology, Bombay Powai Mumbai 400076 India
| | - Vidyasagar Gaikwad
- Department of Chemistry Indian Institute of Technology, Bombay Powai Mumbai 400076 India
| |
Collapse
|
6
|
Xu H, Dickschat JS. Germacrene A-A Central Intermediate in Sesquiterpene Biosynthesis. Chemistry 2020; 26:17318-17341. [PMID: 32442350 PMCID: PMC7821278 DOI: 10.1002/chem.202002163] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/20/2020] [Indexed: 01/17/2023]
Abstract
This review summarises known sesquiterpenes whose biosyntheses proceed through the intermediate germacrene A. First, the occurrence and biosynthesis of germacrene A in Nature and its peculiar chemistry will be highlighted, followed by a discussion of 6-6 and 5-7 bicyclic compounds and their more complex derivatives. For each compound the absolute configuration, if it is known, and the reasoning for its assignment is presented.
Collapse
Affiliation(s)
- Houchao Xu
- Kekulé-Institute for Organic Chemistry and BiochemistryUniversity of BonnGerhard-Domagk-Straße 153121BonnGermany
| | - Jeroen S. Dickschat
- Kekulé-Institute for Organic Chemistry and BiochemistryUniversity of BonnGerhard-Domagk-Straße 153121BonnGermany
| |
Collapse
|
7
|
Armenta-Salinas C, Guzmán-Mejía R, García-Gutiérrez HA, Román-Marín LU, Hernández-Hernández JD, Cerda-García-Rojas CM, Joseph-Nathan P. Novel Sesquiterpene Skeletons by Multiple Wagner-Meerwein Rearrangements of a Longipinane-1,9-diol Derivative. JOURNAL OF NATURAL PRODUCTS 2019; 82:3410-3420. [PMID: 31773961 DOI: 10.1021/acs.jnatprod.9b00784] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The tricyclic sesquiterpene (1R,3R,4S,5S,7S,8S,9S,10R,11R)-7,8-diangeloyloxylongipinan-1,9-diol, or rasteviol (7), underwent multiple Wagner-Meerwein molecular rearrangements and several hydride shifts when treated with Et2O-BF3 to generate the six new compounds (1R,3R,4S,5R,7S,8S,9S,10R,11S)-7,8-diangeloyloxy-1,9-epoxyjiquilpane (8), (1R,3R,4S,5R,7R,8S,9S,11S)-8-angeloyloxy-1,7-epoxyzamor-10(14)-ene (11), (2S,3R,4R,5R,6R,7R,8S,9S,10S)-7,8-diangeloyloxy-6,9-epoxyjanitziane (14), (4R,5R,7S,8S,9S,10S,11S)-7,8-diangeloyloxy-9-hydroxyjiquilp-3(15)-ene (16), (2S,3S,5R,7S,8R,10S,11R)-7,8-diangeloyloxyiratzian-9-one (18), and (2S,3S,5R,10S,11R)-8-angeloyloxyiratzi-7-en-9-one (22), of which 8, 11, 14, and 18 possess new hydrocarbon skeletons. Their structures were determined by 1D and 2D NMR in combination with single-crystal X-ray diffraction analyses of derivatives 10, 15, 20, and 21, which allowed confirmation of their absolute configurations by means of the Flack and Hooft parameters. In addition, some reaction mechanism information was gained from deuterium labeling experiments.
Collapse
Affiliation(s)
- Concepción Armenta-Salinas
- Instituto de Investigaciones Químico Biológicas , Universidad Michoacana de San Nicolás de Hidalgo , Ciudad Universitaria, Morelia , Michoacán , 58030 Mexico
| | - Ramón Guzmán-Mejía
- Instituto de Investigaciones Químico Biológicas , Universidad Michoacana de San Nicolás de Hidalgo , Ciudad Universitaria, Morelia , Michoacán , 58030 Mexico
| | - Hugo A García-Gutiérrez
- Instituto de Investigaciones Químico Biológicas , Universidad Michoacana de San Nicolás de Hidalgo , Ciudad Universitaria, Morelia , Michoacán , 58030 Mexico
| | - Luisa U Román-Marín
- Instituto de Investigaciones Químico Biológicas , Universidad Michoacana de San Nicolás de Hidalgo , Ciudad Universitaria, Morelia , Michoacán , 58030 Mexico
| | - Juan D Hernández-Hernández
- Instituto de Investigaciones Químico Biológicas , Universidad Michoacana de San Nicolás de Hidalgo , Ciudad Universitaria, Morelia , Michoacán , 58030 Mexico
| | - Carlos M Cerda-García-Rojas
- Departamento de Química , Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional , Apartado 14-740 , Mexico City , 07000 Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química , Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional , Apartado 14-740 , Mexico City , 07000 Mexico
| |
Collapse
|
8
|
Smaligo AJ, Swain M, Quintana JC, Tan MF, Kim DA, Kwon O. Hydrodealkenylative C(sp 3)-C(sp 2) bond fragmentation. Science 2019; 364:681-685. [PMID: 31097667 DOI: 10.1126/science.aaw4212] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 03/14/2019] [Indexed: 12/19/2022]
Abstract
Chemical synthesis typically relies on reactions that generate complexity through elaboration of simple starting materials. Less common are deconstructive strategies toward complexity-particularly those involving carbon-carbon bond scission. Here, we introduce one such transformation: the hydrodealkenylative cleavage of C(sp3)-C(sp2) bonds, conducted below room temperature, using ozone, an iron salt, and a hydrogen atom donor. These reactions are performed in nonanhydrous solvents and open to the air; reach completion within 30 minutes; and deliver their products in high yields, even on decagram scales. We have used this broadly functionality tolerant transformation to produce desirable synthetic intermediates, many of which are optically active, from abundantly available terpenes and terpenoid-derived precursors. We have also applied it in the formal total syntheses of complex molecules.
Collapse
Affiliation(s)
- Andrew J Smaligo
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Manisha Swain
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Jason C Quintana
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Mikayla F Tan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Danielle A Kim
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA.
| |
Collapse
|
9
|
Silva-Filho SE, Wiirzler LAM, Cavalcante HAO, Uchida NS, de Souza Silva-Comar FM, Cardia GFE, da Silva EL, Aguiar RP, Bersani-Amado CA, Cuman RKN. Effect of patchouli (Pogostemon cablin) essential oil on in vitro and in vivo leukocytes behavior in acute inflammatory response. Biomed Pharmacother 2016; 84:1697-1704. [DOI: 10.1016/j.biopha.2016.10.084] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 10/26/2016] [Accepted: 10/27/2016] [Indexed: 01/08/2023] Open
|
10
|
Wilde MJ, West CE, Scarlett AG, Jones D, Frank RA, Hewitt LM, Rowland SJ. Bicyclic naphthenic acids in oil sands process water: Identification by comprehensive multidimensional gas chromatography–mass spectrometry. J Chromatogr A 2015; 1378:74-87. [DOI: 10.1016/j.chroma.2014.12.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 11/30/2014] [Accepted: 12/03/2014] [Indexed: 11/15/2022]
|
11
|
|
12
|
Chang MY, Wu MH, Tai HY. NH4OAc Promoted Cyclocondensation of 3-(o-Allylphenyl)pentane-1,5-diones: Synthesis of Tetracyclic Benzofused 1-Azahomoisotwistanes. Org Lett 2012; 14:3936-9. [DOI: 10.1021/ol301693s] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Meng-Yang Chang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
| | | | | |
Collapse
|
13
|
Srikrishna A, Neetu G. Enantiospecific synthesis of the ABC and ABD ring systems of the marine diterpenes aberraranes. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.07.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
14
|
|
15
|
Manner S, Hansson C, Larsson JM, Oltner VT, Frejd T. Asymmetric baker’s yeast reductions of bridgehead-substituted bicyclo[2.2.2]octane-2,6-dione derivatives followed by conversion into catalytically active BODOLs for the diethylzinc addition to benzaldehyde. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.06.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
16
|
Enantiospecific synthesis of ABC-ring system of A-nor and abeo 4(3→2) tetra and pentacyclic triterpenes. Tetrahedron 2010. [DOI: 10.1016/j.tet.2009.11.114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
17
|
|
18
|
Srikrishna A, Pardeshi VH, Satyanarayana G. Enantiospecific approaches to bicyclic vibsanes: a ring-closing metathesis reaction-based strategy to functionalized bicyclo[4.3.1]decanes. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.08.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|