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Ding C, Ren Y, Sun C, Long J, Yin G. Regio- and Stereoselective Alkylboration of Endocyclic Olefins Enabled by Nickel Catalysis. J Am Chem Soc 2021; 143:20027-20034. [PMID: 34734714 DOI: 10.1021/jacs.1c09214] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Whereas there is a significant interest in the rapid construction of diversely substituted saturated heterocycles, direct and modular access is currently limited to the mono-, 2,3-, or 3,4-substitution pattern. This Communication describes the straightforward and modular construction of 2,4-substituted saturated heterocycles from readily available materials in a highly stereo- and regioselective manner, which sets the stage for numerous readily accessible drug motifs. The strategy relies on chain walking catalysis.
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Affiliation(s)
- Chao Ding
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Yaoyu Ren
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Caocao Sun
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Jiao Long
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Guoyin Yin
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, P. R. China
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2
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Siitonen JH, Kattamuri PV, Yousufuddin M, Kürti L. Arylboronic Acid-Catalyzed C-Allylation of Unprotected Oximes: Total Synthesis of N-Me-Euphococcine. Org Lett 2020; 22:2486-2489. [PMID: 32159964 DOI: 10.1021/acs.orglett.0c00727] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
O-Unprotected keto- and aldoximes are readily C-allylated with allyl diisopropyl boronate in the presence of arylboronic acid catalysts to yield highly substituted N-α-secondary and tertiary homoallylic hydroxylamines. The method was used in the total synthesis of the trace alkaloid N-Me-Euphococcine.
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Affiliation(s)
- Juha H Siitonen
- Department of Chemistry, Rice University, 6500 Main Street, Houston, Texas 77030, United States
| | - Padmanabha V Kattamuri
- Department of Chemistry, Rice University, 6500 Main Street, Houston, Texas 77030, United States
| | - Muhammed Yousufuddin
- Life and Health Sciences Department, The University of North Texas at Dallas, 7400 University Hills Boulevard, Dallas, Texas 75241, United States
| | - László Kürti
- Department of Chemistry, Rice University, 6500 Main Street, Houston, Texas 77030, United States
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3
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BET & ELF Quantum Topological Analysis of Neutral 2-Aza-Cope Rearrangement of γ-Alkenyl Nitrones. Molecules 2017; 22:molecules22081371. [PMID: 28825616 PMCID: PMC6151987 DOI: 10.3390/molecules22081371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 08/15/2017] [Accepted: 08/18/2017] [Indexed: 12/01/2022] Open
Abstract
The 2-Aza-Cope rearrangement of γ-alkenyl nitrones is a rare example of the neutral thermal 2-aza-Cope process that usually takes place with cationic species. During the rearrangement, a redistribution of bonds and electronic density occurs in one kinetic step. However, the introduction of substituents with different steric requirements and electronic features might alter the activation energies and the synchronicity of the reaction. The electron localization function (ELF) analysis and its application to Bonding Evolution Theory (BET) analysis within the context of Molecular Electron Density Theory (MEDT) is an excellent tool to monitor the electron density along the reaction coordinate and thus investigate in detail bond breaking and formation and the corresponding energy barriers. By analyzing topological ELF calculations of seventeen 2-aza-Cope nitrone rearrangements with selected substituents, the main factors influencing the synchronicity of the process were investigated. This MEDT study results revealed that the rearrangement is a non-polar process mostly influenced by steric factors rather than by electronic ones, and confirms the pseudoradical character of the process rather than any pericyclic electron-reorganization.
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4
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Veerasamy N, Carter RG. Synthesis of quinolizidine-containing lycopodium alkaloids and related natural products. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Yokoyama T, Fukami Y, Sato T, Chida N. Synthesis of (±)-Lasubine II Using N-Methoxyamines. Chem Asian J 2016; 11:470-3. [PMID: 26582105 DOI: 10.1002/asia.201501143] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Indexed: 12/28/2022]
Abstract
The synthesis of (±)-lasubine II has been achieved through a three-component allylation capitalizing on the unique properties of N-methoxyamines. This reaction enabled the installation of all the carbon atoms of lasubine II in a single operation. The N-methoxy group was efficiently used for the subsequent nitrone formation. A single-step cyclization of isoxazolidines or N-methoxyamines to form functionalized piperidine rings was also developed.
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Affiliation(s)
- Takashi Yokoyama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Yutaro Fukami
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
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Patil VV, Gayakwad EM, Shankarling GS. m-CPBA Mediated Metal Free, Rapid Oxidation of Aliphatic Amines to Oximes. J Org Chem 2016; 81:781-6. [DOI: 10.1021/acs.joc.5b01740] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Vilas V. Patil
- Department of Dyestuff Technology, Institute of Chemical Technology, N. P. Marg, Matunga, Mumbai 400019, India
| | - Eknath M. Gayakwad
- Department of Dyestuff Technology, Institute of Chemical Technology, N. P. Marg, Matunga, Mumbai 400019, India
| | - Ganapati S. Shankarling
- Department of Dyestuff Technology, Institute of Chemical Technology, N. P. Marg, Matunga, Mumbai 400019, India
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Wang EC, Huang KS, Chen HM, Wu CC, Lin GJ. An Efficient Method for the Preparation of Nitrilesviathe Dehydration of Aldoximes with Phthalic Anhydride. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200400093] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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8
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Delso I, Melicchio A, Isasi A, Tejero T, Merino P. Evasive Neutral 2-Aza-Cope Rearrangements. Kinetic and Computational Studies with Cyclic Nitrones. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300836] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Saha N, Chattopadhyay SK. Enantiodivergency and enantioconvergency in the synthesis of the dendrobate alkaloid 241D. J Org Chem 2012. [PMID: 23205643 DOI: 10.1021/jo3019329] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A diastereodivergent preparation of two N-alkenylnitrones (9 and 11) from easily available (R)-2,3-O-cyclohexylideneglyceraldehyde (5) led to an enantiodivergent synthesis of both enantiomers of the dendrobate alkaloid 241D in a sequential two-directional approach involving intramolecular nitrone cycloaddition as the key step. Either of these two nitrones could, in principle, be utilized for the preparation of the title compounds in an enantioconvergent fashion as well. The methodology was extended to prepare an analogue (33) of (-)-241D.
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Affiliation(s)
- Nemai Saha
- Department of Chemistry, University of Kalyani, Kalyani-741235, West Bengal, India
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10
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Highly stereoselective synthesis of imino-C-di- and trisaccharides as hydrolytically stable glycomimetics. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.05.126] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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11
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Yang D, Micalizio GC. Convergent and stereodivergent synthesis of complex 1-aza-7-oxabicyclo[2.2.1]heptanes. J Am Chem Soc 2011; 133:9216-9. [PMID: 21604673 DOI: 10.1021/ja202900h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convergent and stereodivergent pathway to highly substituted 1-aza-7-oxabicyclo[2.2.1]heptanes is described. It begins with a coupling reaction involving allylic alcohol, aldehyde, and LiHMDS to produce stereodefined primary homoallylic amines. Subsequent N-oxidation and condensation with formaldehyde or glyoxylate defines a convenient entry to densely functionalized homoallylic nitrones whose intramolecular annulation can be controlled to deliver one of two distinct heterocyclic skeletons, each with ≥20:1 stereoselection. Control of the stereochemistry in these reactions results from both control of the nitrone geometry and selective partitioning of the reaction pathway between direct [3 + 2] cycloaddition and tandem [3,3] rearrangement/[3 + 2] cycloaddition.
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Affiliation(s)
- Dexi Yang
- Department of Chemistry, The Scripps Research Institute, Scripps Florida, Jupiter, Florida 33458, USA
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12
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Marca E, Delso I, Tejero T, Vázquez JT, Dorta RL, Merino P. Intramolecular 1,3-dipolar cycloaddition of N-alkenyl nitrones en route to glycosyl piperidines. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.10.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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14
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Merino P, Mannucci V, Tejero T. Exploring Nitrone Chemistry: Towards the Enantiodivergent Synthesis of 6-Substituted 4-Hydroxypipecolic Acid Derivatives. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800348] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Merino P, Tejero T, Mannucci V. Experimental and theoretical evidences of 2-aza-Cope rearrangement of nitrones. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.03.071] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Liu S, Fan Y, Peng X, Wang W, Hua W, Akber H, Liao L. A concise and enantioselective approach to the total synthesis of (−)-lasubine I. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.08.137] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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White JD, Hansen JD. Total Synthesis of (−)-7-Epicylindrospermopsin, a Toxic Metabolite of the Freshwater Cyanobacterium Aphanizomenon ovalisporum, and Assignment of Its Absolute Configuration. J Org Chem 2004; 70:1963-77. [PMID: 15760174 DOI: 10.1021/jo0486387] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] The Z and E nitrones 38 and 39 from condensation of aldehyde 20 with hydroxylamine 36 underwent intramolecular dipolar cycloaddition to give the substituted 1-aza-7-oxobicyclo[2.2.1] heptanes 40 and 41 in a ratio of 2:1, respectively. Reductive N-O bond cleavage of 40 followed by carbonylation gave cyclic urea 47 in which inversion of the secondary alcohol was effected via an oxidation-reduction sequence. After conversion of the p-bromobenzyl ether 50 to azide 54, activation of the cyclic urea as its O-methylisourea and reduction of the azide led to spontaneous cyclization to afford the tricyclic nucleus 59 of cylindrospermopsin. Global deprotection, including hydrolysis of the 2,4-dimethyoxypyrimidine appendage to a uracil, and then monosulfation of the resultant diol 60 afforded a substance identical with natural (-)-7-epicylindrospermopsin (1). The asymmetric synthesis of (-)-7-epicylindrospermopsin defines its absolute configuration as 7S,8R,10S,12S,13R,14S.
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Affiliation(s)
- James D White
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, USA
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18
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Lu W, Chan TH. Indium-Mediated Organometallic Reactions in Aqueous Media. Stereoselectivity in the Crotylation of Sulfonimines Bearing a Proximal Chelating Group. J Org Chem 2001; 66:3467-73. [PMID: 11348131 DOI: 10.1021/jo0018038] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reaction of sulfonimines having proximal chelating groups with crotyl bromide and indium in aqueous media gave alpha-crotylation products stereoselectively with syn-selectivity.
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Affiliation(s)
- W Lu
- Department of Chemistry, McGill University, Montreal, Quebec, H3A 2K6 Canada
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19
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Budzińska A, Sas W. Preparation of highly substituted 7-oxa-1-azabicyclo[2.2.1]heptanes from 4-nitro-1-butene derivatives. Route to polysubstituted piperidines. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00021-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Inomata K, Ukaji Y, Imai M, Yamada T. Enantioselective Synthesis of Lythraceae Alkaloid Lasubine II via Optically Active 2-Isoxazoline. HETEROCYCLES 2000. [DOI: 10.3987/com-99-s82] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Budzińska A, Bukowska M, Sas W. Preparation of 2,2,6-trisubstituted 7-oxa-1-azabicyclo[2.2.1]heptanes from 4-nitro-1-butene derivatives. A route to 2,2,6-trisubstituted-4-hydroxypiperidines. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(98)02357-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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22
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Chalard P, Remuson R, Gelas-Mialhe Y, Gramain JC. Asymmetric synthesis of quinolizidine alkaloids (−)-lasubine I, (−)-lasubine II and (+)-subcosine II. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0957-4166(98)00468-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Simon C, Hosztafi S, Makleit S. Application of the mitsunobu reaction in the field of alkaloids. J Heterocycl Chem 1997. [DOI: 10.1002/jhet.5570340201] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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25
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Pilli R, Dias L, Maldaner A. Tandem N-acyliminium-Michael addition reaction. An efficient total Synthesis of the quinolizidine alkaloids (+/−)-myrtine and (+/−)-lasubine II. Tetrahedron Lett 1993. [DOI: 10.1016/s0040-4039(00)73547-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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27
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Hoffmann RW, Endesfelder A. Diastereoselective Addition of Crotylboronates to Oximes. ACTA ACUST UNITED AC 1987. [DOI: 10.1002/jlac.198719870310] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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28
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Kolasa T, Sharma S, Miller MJ. Reactions of organometallics with oximes. Synthesis of α-N-hydroxy amino acids. Tetrahedron Lett 1987. [DOI: 10.1016/s0040-4039(00)96673-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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