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Ghosh AK, Basu AJ, Hsu CS, Yadav M. Asymmetric 1,2-Carbamoyl Rearrangement of Lithiated Chiral Oxazolidine Carbamates and Diastereoselective Synthesis of α-Hydroxy Amides. Chemistry 2022; 28:e202200941. [PMID: 35587995 PMCID: PMC9356997 DOI: 10.1002/chem.202200941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Indexed: 11/11/2022]
Abstract
Asymmetric 1,2-carbamoyl rearrangement of lithiated 2-alkenyl carbamates has been investigated. Deprotonation of chiral 2-alkenyl oxazolidine carbamates with sec-butyllithium in ether at -78 °C followed by warming of the resulting 1-lithio-2-alkenyl derivatives to room temperature resulted in 1,2-carbamoyl rearrangement to provide α-hydroxy amides. The rearrangement proceeded with excellent diastereoselectivity and in good to excellent isolated yield of the α-hydroxy amide derivatives. The substrate scope of the reaction was investigated with a variety of 2-alkenyl and benzyl oxazolidine carbamates. A stereochemical model is provided to explain the stereochemical outcome associated with the rearrangement. Acid-catalyzed removal of the chiral oxazolidine afforded α-hydroxy acid in high optical purity.
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Affiliation(s)
- Arun K Ghosh
- Department of Chemistry and Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, 560 Oval Dr., West Lafayette, IN 47907, USA
| | - Amartyo J Basu
- Department of Chemistry and Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, 560 Oval Dr., West Lafayette, IN 47907, USA
| | - Che-Sheng Hsu
- Department of Chemistry and Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, 560 Oval Dr., West Lafayette, IN 47907, USA
| | - Monika Yadav
- Department of Chemistry and Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, 560 Oval Dr., West Lafayette, IN 47907, USA
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2
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Tanpure SD, El-Mansy MF, Blakemore PR. Synthesis of a P-Glycoprotein Inhibitor and Its High-Energy ( Z)-Isomer by Carbenoid Eliminative Cross-Coupling. Org Lett 2020; 22:2999-3003. [PMID: 32227909 DOI: 10.1021/acs.orglett.0c00755] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To gauge the feasibility of carbenoid eliminative cross-coupling for the synthesis of polyfunctional alkenes, a P-glycoprotein inhibitor containing an (E)-configured 4-chromanylidene-type trisubstituted olefin was prepared as well as its previously undescribed (Z)-isomer. Stereospecific alkene synthesis required generation of functionalized enantioenriched α-metalated carbamates [R1R2CM(O2CNi-Pr2), M = Li or Bneo], and problems associated with incorrect lithiation regioselectivity and unexpected organolithium configurational lability were encountered. Solutions to these difficulties are described together with a method for ee determination of α-carbamoyloxyboronates.
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Affiliation(s)
- Subhash D Tanpure
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, United States
| | - Mohamed F El-Mansy
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, United States
| | - Paul R Blakemore
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, United States
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Pulis AP, Varela A, Citti C, Songara P, Leonori D, Aggarwal VK. Asymmetric Synthesis of Tertiary Alcohols and Thiols via Nonstabilized Tertiary α-Oxy- and α-Thio-Substituted Organolithium Species. Angew Chem Int Ed Engl 2017; 56:10835-10839. [PMID: 28783238 PMCID: PMC5601220 DOI: 10.1002/anie.201706722] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Indexed: 11/20/2022]
Abstract
Nonstabilized α-O-substituted tertiary organolithium species are difficult to generate, and the α-S-substituted analogues are configurationally unstable. We now report that they can both be generated easily and trapped with a range of electrophiles with high enantioselectivity, providing ready access to a range of enantioenriched tertiary alcohols and thiols. The configurational stability of the α-S-organolithium species was enhanced by using a less coordinating solvent and short reaction times.
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Affiliation(s)
- Alexander P. Pulis
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Ana Varela
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Cinzia Citti
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Pradip Songara
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Daniele Leonori
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
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Pulis AP, Varela A, Citti C, Songara P, Leonori D, Aggarwal VK. Asymmetric Synthesis of Tertiary Alcohols and Thiols via Nonstabilized Tertiary α-Oxy- and α-Thio-Substituted Organolithium Species. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexander P. Pulis
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
| | - Ana Varela
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Cinzia Citti
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Pradip Songara
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Daniele Leonori
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
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Rouden J, Lasne MC, Blanchet J, Baudoux J. (−)-Cytisine and Derivatives: Synthesis, Reactivity, and Applications. Chem Rev 2013; 114:712-78. [DOI: 10.1021/cr400307e] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Jacques Rouden
- Laboratoire de Chimie Moléculaire
et Thioorganique, ENSICAEN-Université de Caen, CNRS, Institut Normand de Chimie Moléculaire, Médicinale et Macromoléculaire (INC3M), 6 Boulevard du Maréchal Juin, 14050 Caen, France
| | - Marie-Claire Lasne
- Laboratoire de Chimie Moléculaire
et Thioorganique, ENSICAEN-Université de Caen, CNRS, Institut Normand de Chimie Moléculaire, Médicinale et Macromoléculaire (INC3M), 6 Boulevard du Maréchal Juin, 14050 Caen, France
| | - Jérôme Blanchet
- Laboratoire de Chimie Moléculaire
et Thioorganique, ENSICAEN-Université de Caen, CNRS, Institut Normand de Chimie Moléculaire, Médicinale et Macromoléculaire (INC3M), 6 Boulevard du Maréchal Juin, 14050 Caen, France
| | - Jérôme Baudoux
- Laboratoire de Chimie Moléculaire
et Thioorganique, ENSICAEN-Université de Caen, CNRS, Institut Normand de Chimie Moléculaire, Médicinale et Macromoléculaire (INC3M), 6 Boulevard du Maréchal Juin, 14050 Caen, France
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6
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Breuning M, Hein D. 5-Substituted Derivatives of the Tricyclic (+)-Sparteine Surrogate in the Enantioselective Lithiation/Stannylation of anO-Alkyl Carbamate. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300987] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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7
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Fournier AM, Nichols CJ, Vincent MA, Hillier IH, Clayden J. Lithium Choreography: Intramolecular Arylations of Carbamate-Stabilised Carbanions and Their Mechanisms Probed by In Situ IR Spectroscopy and DFT Calculations. Chemistry 2012; 18:16478-90. [DOI: 10.1002/chem.201201761] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 08/29/2012] [Indexed: 11/10/2022]
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Hémery T, Becker J, Fröhlich R, Hoppe D. (-)-Myrtenyl N,N-Diisopropylcarbamate: Stereochemistry of Lithiation and Electrophilic Substitution Directed by Dynamic Kinetic Diastereoisomer Resolution. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000390] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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9
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O'Brien P. Basic instinct: design, synthesis and evaluation of (+)-sparteine surrogates for asymmetric synthesis. Chem Commun (Camb) 2008:655-67. [DOI: 10.1039/b711420f] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Breuning M, Hein D. First asymmetric synthesis of a C2-symmetric 2-endo,6-endo-disubstituted bispidine. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.tetasy.2007.06.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Genet C, McGrath MJ, O'Brien P. Evaluation of sparteine-like chiral diamines in the enantioselective lithiation–electrophilic trapping of an O-alkyl carbamate. Org Biomol Chem 2006. [DOI: 10.1039/b600032k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Miyata O, Hashimoto J, Iba R, Naito T. Preparation of optically active α-hydroxy oxime ether by diastereoselective imino 1,2-Wittig rearrangement of hydroximates and its application to synthesis of (+)-cytoxazone. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.04.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Miyata O, Koizumi T, Asai H, Iba R, Naito T. Imino 1,2-Wittig rearrangement of hydroximates and its application to synthesis of cytoxazone. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.02.048] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Enantioselective Synthesis by Lithiation Adjacent to Oxygen and Subsequent Rearrangement. TOP ORGANOMETAL CHEM 2003. [DOI: 10.1007/3-540-36117-0_7] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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Tomoyasu T, Tomooka K, Nakai T. Asymmetric synthesis of enantio-enriched acyclic α-amino alkylstannanes and rearrangement behavior of carbanions thereof. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(02)02811-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Enantioselective Synthesis by Lithiation Adjacent to Oxygen and Electrophile Incorporation. TOP ORGANOMETAL CHEM 2003. [DOI: 10.1007/3-540-36117-0_4] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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17
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Dearden MJ, Firkin CR, Hermet JPR, O'Brien P. A readily-accessible (+)-sparteine surrogate. J Am Chem Soc 2002; 124:11870-1. [PMID: 12358529 DOI: 10.1021/ja027774v] [Citation(s) in RCA: 200] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A "(+)-sparteine-like" chiral diamine, readily synthesized in three steps from (-)-cytisine, has been evaluated in four different asymmetric transformations; in each case, selectivity in an enantiocomplementary fashion to (-)-sparteine was observed.
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Affiliation(s)
- Michael J Dearden
- Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
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Uneyama K, Ohkura H, Hao J, Amii H. A trial toward the synthesis of gamma-fluorinated beta-amino-alpha-thiohydroxyamino acid: a finding of desulfurizative C-C bond formation in thio-Wittig-type rearrangement of S-(N-aryl-trifluoroacetimidoyl)thioglycolates. J Org Chem 2001; 66:1026-9. [PMID: 11430067 DOI: 10.1021/jo0010330] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K Uneyama
- Department of Applied Chemistry, Faculty of Engineering, Okayama University, Okayama 700-8530, Japan.
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