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Delany PK, Mortimer CL, Hodgson DM. Electrophile dependent mechanisms in the asymmetric trapping of α-lithio- N-( tert-butoxythiocarbonyl)azetidine. Chem Commun (Camb) 2020; 56:12174-12177. [PMID: 32910117 DOI: 10.1039/d0cc05396a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sn-Li exchange and 'poor man's Hoffmann tests' establish asymmetric trapping of α-lithio-N-(tert-butoxythiocarbonyl) (Botc) azetidine to be controlled by dynamic thermodynamic resolution or dynamic kinetic resolution, depending on the electrophile. Unusually, different configurational stability is seen for the anion generated by lithiation compared to transmetallation. Configurational stability of α-lithio-N-Boc azetidine indicates instability with the N-Botc system is due to the C[double bond, length as m-dash]S group.
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Affiliation(s)
- Pascal K Delany
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK.
| | - Claire L Mortimer
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK.
| | - David M Hodgson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK.
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2
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Zhao C, Wang X, Xu L, Cao Y, Cui H, Wang Y. Cascade substitution reaction between oxabornene and amines to construct cyclohexa‐1,4‐diene‐3,6‐diamine and amino alcohol. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Changkuo Zhao
- Department of PharmacyZunyi Medical University Zunyi Guizhou China
| | - Xianheng Wang
- Department of PharmacyZunyi Medical University Zunyi Guizhou China
| | - Lang Xu
- Department of PharmacyZunyi Medical University Zunyi Guizhou China
| | - Ying Cao
- Department of PharmacyZunyi Medical University Zunyi Guizhou China
| | - Hanqi Cui
- Department of PharmacyZunyi Medical University Zunyi Guizhou China
| | - Yuhe Wang
- Department of PharmacyAffiliated Hospital of Zunyi Medical College Zunyi Guizhou China
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3
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Delany PK, Hodgson DM. Synthesis and Homologation of an Azetidin-2-yl Boronic Ester with α-Lithioalkyl Triisopropylbenzoates. Org Lett 2019; 21:9981-9984. [PMID: 31800252 DOI: 10.1021/acs.orglett.9b03901] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An α-boryl azetidine, obtained by α-lithiation-borylation of N-Botc azetidine, undergoes reaction with α-triisopropylbenzoyloxy organolithiums to give homologated boronic esters that can be further oxidized, homologated, arylated, and deprotected to give a range of α-substituted azetidines. Scalemic α-boryl azetidine-α-triisopropylbenzoyloxy organolithium pairings show stereospecific reagent control, providing access to either diastereomeric series of homologated boronic esters with very high er's.
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Affiliation(s)
- Pascal K Delany
- Department of Chemistry, Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford OX1 3TA , U.K
| | - David M Hodgson
- Department of Chemistry, Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford OX1 3TA , U.K
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4
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Saied T, Demangeat C, Panossian A, Leroux FR, Fort Y, Comoy C. Transition‐Metal‐Free Heterobiaryl Synthesis via Aryne Coupling. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900130] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Tarak Saied
- Université de Lorraine CNRS, L2CM UMR7053 B.P. 70239 54506 Vandoeuvre‐lès‐Nancy France
| | - Catherine Demangeat
- Université de Lorraine CNRS, L2CM UMR7053 B.P. 70239 54506 Vandoeuvre‐lès‐Nancy France
| | - Armen Panossian
- Université de Haute‐Alsace Université de Strasbourg 67000 Strasbourg France
| | - Frédéric R. Leroux
- Université de Haute‐Alsace Université de Strasbourg 67000 Strasbourg France
| | - Yves Fort
- Université de Lorraine CNRS, L2CM UMR7053 B.P. 70239 54506 Vandoeuvre‐lès‐Nancy France
| | - Corinne Comoy
- Université de Lorraine CNRS, L2CM UMR7053 B.P. 70239 54506 Vandoeuvre‐lès‐Nancy France
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5
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Fan D, Liu Y, Jia J, Zhang Z, Liu Y, Zhang W. Synthesis of Chiral α-Aminosilanes through Palladium-Catalyzed Asymmetric Hydrogenation of Silylimines. Org Lett 2019; 21:1042-1045. [DOI: 10.1021/acs.orglett.8b04073] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Antermite D, Degennaro L, Luisi R. Recent advances in the chemistry of metallated azetidines. Org Biomol Chem 2017; 15:34-50. [DOI: 10.1039/c6ob01665k] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The almost unexplored four-membered azetidines represent a particularly interesting class of molecules, among the family of saturated nitrogen heterocycles. This review reports recent developments in direct metal-based functionalization of the azetidine ring, focusing on the regio- and stereoselectivity of these reactions.
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Affiliation(s)
- Daniele Antermite
- Department of Pharmacy – Drug Sciences
- University of Bari
- Bari 70125
- Italy
| | | | - Renzo Luisi
- Department of Pharmacy – Drug Sciences
- University of Bari
- Bari 70125
- Italy
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7
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Praz J, Graff J, Egger L, Guénée L, Wagschal S, Kündig EP, Alexakis A. Asymmetric bromine-lithium exchange: on the importance of both the diamine ligand and the organolithium reagent. Chem Commun (Camb) 2015; 51:16912-5. [PMID: 26439116 DOI: 10.1039/c5cc06548h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The asymmetric bromine-lithium exchange on a series of prochiral biphenyls was investigated. As in many asymmetric organolithium reactions, the chiral ligand (here a diamine) was considered to be the enantiocontrolling element. We show here that the organolithium reagent also plays an important role.
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Affiliation(s)
- Jézabel Praz
- Department of Organic Chemistry, University of Geneva, 30, quai Ernest-Ansermet, Genève 4, 1211 Switzerland.
| | - Julien Graff
- Department of Organic Chemistry, University of Geneva, 30, quai Ernest-Ansermet, Genève 4, 1211 Switzerland.
| | - Léo Egger
- Department of Organic Chemistry, University of Geneva, 30, quai Ernest-Ansermet, Genève 4, 1211 Switzerland.
| | - Laure Guénée
- Department of Organic Chemistry, University of Geneva, 30, quai Ernest-Ansermet, Genève 4, 1211 Switzerland.
| | - Simon Wagschal
- Department of Organic Chemistry, University of Geneva, 30, quai Ernest-Ansermet, Genève 4, 1211 Switzerland.
| | - E Peter Kündig
- Department of Organic Chemistry, University of Geneva, 30, quai Ernest-Ansermet, Genève 4, 1211 Switzerland.
| | - Alexandre Alexakis
- Department of Organic Chemistry, University of Geneva, 30, quai Ernest-Ansermet, Genève 4, 1211 Switzerland.
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Graff J, Łastawiecka E, Guénée L, Leroux F, Alexakis A. Asymmetric Bromine-Lithium Exchange: Application toward the Synthesis of New Biaryl-Diphosphine Ligands. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500323] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Chen YJ, Cui Z, Feng CG, Lin GQ. Enantioselective Addition of Heteroarylboronates to Arylimines Catalyzed by a Rhodium-Diene Complex. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500147] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Hodgson DM, Mortimer CL, McKenna JM. Amine protection/α-activation with the tert-butoxythiocarbonyl group: application to azetidine lithiation-electrophilic substitution. Org Lett 2014; 17:330-3. [PMID: 25535850 DOI: 10.1021/ol503441d] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
tert-Butoxythiocarbonyl (Botc), the long-neglected thiocarbonyl analogue of Boc, facilitates (unlike its alkoxycarbonyl cousin) α-lithiation and electrophile incorporation on N-Botc-azetidine. N,N,N',N'-endo,endo-Tetramethyl-2,5-diaminonorbornane proved optimal as a chiral ligand, generating adducts with er up to 92:8. Facile deprotection, under conditions that left the corresponding N-Boc systems intact, was achieved using either TFA or via thermolysis in ethanol.
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Affiliation(s)
- David M Hodgson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
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Ćwiek R, Niedziejko P, Kałuża Z. Synthesis of Tunable Diamine Ligands with Spiro Indane-2,2′-pyrrolidine Backbone and Their Applications in Enantioselective Henry Reaction. J Org Chem 2014; 79:1222-34. [DOI: 10.1021/jo402631u] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rafał Ćwiek
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Piotr Niedziejko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Zbigniew Kałuża
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
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12
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Graff J, Debande T, Praz J, Guénée L, Alexakis A. Asymmetric Bromine–Lithium Exchange: Application toward the Synthesis of Natural Product. Org Lett 2013; 15:4270-3. [DOI: 10.1021/ol4021157] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Julien Graff
- Department of Organic Chemistry and Laboratory of Crystallography, University of Geneva, Quai Ernest Ansermet 30, Geneva 4, CH-1211 Switzerland
| | - Thibaut Debande
- Department of Organic Chemistry and Laboratory of Crystallography, University of Geneva, Quai Ernest Ansermet 30, Geneva 4, CH-1211 Switzerland
| | - Jézabel Praz
- Department of Organic Chemistry and Laboratory of Crystallography, University of Geneva, Quai Ernest Ansermet 30, Geneva 4, CH-1211 Switzerland
| | - Laure Guénée
- Department of Organic Chemistry and Laboratory of Crystallography, University of Geneva, Quai Ernest Ansermet 30, Geneva 4, CH-1211 Switzerland
| | - Alexandre Alexakis
- Department of Organic Chemistry and Laboratory of Crystallography, University of Geneva, Quai Ernest Ansermet 30, Geneva 4, CH-1211 Switzerland
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