1
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van Veen BC, Clayden J. Intramolecular Nucleophilic Vinylic Substitution (S NV) by Carbon Nucleophiles: Conformationally Directed Formation of Dienes from N,N'-Diallyl Ureas. Chemistry 2024:e202402352. [PMID: 38963681 DOI: 10.1002/chem.202402352] [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] [Received: 07/03/2024] [Accepted: 07/04/2024] [Indexed: 07/05/2024]
Abstract
Nucleophilic vinylic substitution (SNV) by carbon nucleophiles allows the formation of vinylic C-C bonds without transition metal catalysts. In this paper, we show that tethering two alkenes together through a urea linkage can lead to the formation of a diene by an intramolecular SNV reaction. The starting materials are fully substituted N,N'-diallyl ureas; the reaction proceeds in the presence of base, and entails a cascade of deprotonations, reprotonations, and an SNV reaction of an allylic carbanion on a rare electrophile: a vinylic urea. As a result, two allylic substituents couple to form a diene, despite the fact that neither is activated towards electrophilic attack. The reaction is tolerant of significant steric bulk, and exhibits regioselectivity with unsymmetrical diallyl ureas: β-substituted allyl groups invariably behave as nucleophiles, while electrophilic behavior may be enforced by the use of an E-vinylic urea substituent that cannot be deprotonated under the reaction conditions.
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Affiliation(s)
- Branca C van Veen
- School of Chemistry, University of Bristol, Cantock's Close, BS8 1TS, Bristol, UK
| | - Jonathan Clayden
- School of Chemistry, University of Bristol, Cantock's Close, BS8 1TS, Bristol, UK
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2
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Li Y, Feng Z, Tong H. The crystal structure of 1-(2-chlorophenyl)-3-cycloheptylurea, C 14H 19ClN 2O. Z KRIST-NEW CRYST ST 2023. [DOI: 10.1515/ncrs-2023-0080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
Abstract
C14H19ClN2O, orthorhombic, P212121 (no. 19), a = 8.9579(3) Å, b = 12.2172(4) Å, c = 12.5669(5) Å, V = 1375.33(8) Å3, Z = 4, R
gt(F) = 0.0541, wR
ref
(F
2) = 0.1449, T = 193 K.
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3
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Ma J, Zou Q, Wang C, Yin G, Li F. Development of β,β-Dibrominated Secondary Enamides and Their Application to the Synthesis of 5-Br Oxazoles. J Org Chem 2022; 87:15670-15678. [PMID: 36315618 DOI: 10.1021/acs.joc.2c01927] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Herein, we report a base promoted dibromination of enamides using CBr4 as a bromine source to provide expedient access to β,β-dibrominated secondary enamides. Preliminary synthetic application study shows that these novel products can be readily transformed to 5-Br oxazoles via Cu(I) catalyzed intramolecular cyclization in good yields.
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Affiliation(s)
- Jun Ma
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, P. R. China.,Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, P. R. China
| | - Qijie Zou
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, P. R. China.,Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, P. R. China
| | - Chunhua Wang
- School of Medicine, Foshan University, Foshan 528225, P. R. China
| | - Guangwei Yin
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, P. R. China.,Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, P. R. China
| | - Fangyi Li
- College of Pharmaceutical Engineering of Traditional Chinese Medicine, State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, P. R. China.,Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, P. R. China
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4
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Loro C, Sala R, Penso M, Foschi F. DBU Catalysed Enantioselective Degradative Rearrangement: a Way to Tetrasubstituted 2‐Aryl‐2‐Amino Esters. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Camilla Loro
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 9 IT-20100 Como Italy
| | - Roberto Sala
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 9 IT-20100 Como Italy
| | - Michele Penso
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC) Via Golgi 19 IT-20133 Milano Italy
| | - Francesca Foschi
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 9 IT-20100 Como Italy
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5
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Abas H, Mas‐Roselló J, Amer MM, Durand DJ, Groleau RR, Fey N, Clayden J. Asymmetric and Geometry‐Selective α‐Alkenylation of α‐Amino Acids. Angew Chem Int Ed Engl 2019; 58:2418-2422. [DOI: 10.1002/anie.201813984] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Hossay Abas
- School of Chemistry Cantock's Close Bristol BS8 1TS UK
| | | | | | | | | | - Natalie Fey
- School of Chemistry Cantock's Close Bristol BS8 1TS UK
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6
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Abas H, Mas-Roselló J, Amer MM, Durand DJ, Groleau RR, Fey N, Clayden J. Asymmetric and Geometry-Selective α-Alkenylation of α-Amino Acids. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813984] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hossay Abas
- School of Chemistry; Cantock's Close Bristol BS8 1TS UK
| | | | | | | | | | - Natalie Fey
- School of Chemistry; Cantock's Close Bristol BS8 1TS UK
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7
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Janesko BG, Villegas H. Attractive Nonbonded Interactions Help Stabilize the Z Form of Alkenyl Anions. J Org Chem 2018; 83:8208-8213. [PMID: 30003784 DOI: 10.1021/acs.joc.8b00960] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Alkenyl anions ((-)H2C-CH═CH-Y; Y = aliphatic, aromatic, amine, ether) are often thermodynamically stable in the sterically congested Z form. This preference for Z structures is used to control regiochemistry in organometallic and Grignard reactions, allyl amine rearrangements to enamines, and allyl ether rearrangements to enol ethers. Explanations for Z stability in alkenes (Y = CH2R) typically invoke through-space attraction (Coulomb or charge transfer) between the formally anionic carbon C1 and the Y = CH2R hydrogens. However, this explanation is difficult to generalize to amines and ethers. We suggest that the orbital-driven so-called "attractive nonbonded interactions" suggested to stabilize the Z forms of 1,2-difluoroethylene and 1-substituted propenes also help stabilize Z alkenyl anions. We present electronic structure calculations and surveys of the experimental literature to show these effects' relevance for alkenyl anions. Our results suggest new approaches for regiocontrol in reactions with alkenyl anion intermediates and motivate revisiting older orbital-based theories of "attractive nonbonded interactions".
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Affiliation(s)
- Benjamin G Janesko
- Department of Chemistry and Biochemistry , Texas Christian University , Fort Worth , Texas 76129 , United States
| | - Hector Villegas
- Department of Chemistry and Biochemistry , Texas Christian University , Fort Worth , Texas 76129 , United States
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8
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Mas-Roselló J, Hachisu S, Clayden J. Geometry-Retentive C-Alkenylation of Lithiated α-Aminonitriles: Quaternary α-Alkenyl Amino Acids and Hydantoins. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704908] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Josep Mas-Roselló
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Shuji Hachisu
- Syngenta Agrochemicals; Jealotts Hill Research Station Bracknell, Berks RG42 6EY UK
| | - Jonathan Clayden
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
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9
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Mas-Roselló J, Hachisu S, Clayden J. Geometry-Retentive C-Alkenylation of Lithiated α-Aminonitriles: Quaternary α-Alkenyl Amino Acids and Hydantoins. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201704908] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Josep Mas-Roselló
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Shuji Hachisu
- Syngenta Agrochemicals; Jealotts Hill Research Station Bracknell, Berks RG42 6EY UK
| | - Jonathan Clayden
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
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10
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Zhou H, Hong J, Huang J, Chen Z. Highly Efficient Curtius Rearrangement Approach for the Synthesis of Unsymmetrical Sulfonimidoyl Ureas. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700248] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hao Zhou
- Key Laboratory of Functional Small Organic Molecules; Ministry of Education; College of Chemistry & Chemical Engineering; Jiangxi Normal University; 99 Ziyang Road Nanchang Jiangxi 330022 P. R. China
| | - Jianquan Hong
- School of Chemical and Material Engineering; Jiangnan University; 1800 Lihu Road Wuxi Jiangsu 214122 P. R. China
| | - Jiapian Huang
- Key Laboratory of Functional Small Organic Molecules; Ministry of Education; College of Chemistry & Chemical Engineering; Jiangxi Normal University; 99 Ziyang Road Nanchang Jiangxi 330022 P. R. China
| | - Zhiyuan Chen
- Key Laboratory of Functional Small Organic Molecules; Ministry of Education; College of Chemistry & Chemical Engineering; Jiangxi Normal University; 99 Ziyang Road Nanchang Jiangxi 330022 P. R. China
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11
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Intramolecular vinylation of carbanions using N -acyl benzomorpholines as masked vinylureas and vinylcarbamates. CR CHIM 2017. [DOI: 10.1016/j.crci.2017.01.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Huang L, Arndt M, Gooßen K, Heydt H, Gooßen LJ. Late Transition Metal-Catalyzed Hydroamination and Hydroamidation. Chem Rev 2015; 115:2596-697. [DOI: 10.1021/cr300389u] [Citation(s) in RCA: 739] [Impact Index Per Article: 82.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Liangbin Huang
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Matthias Arndt
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Käthe Gooßen
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Heinrich Heydt
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
| | - Lukas J. Gooßen
- Department of Chemistry, TU Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663 Kaiserslautern, Germany
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13
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Tait MB, Butterworth S, Clayden J. 2,2- and 2,6-Diarylpiperidines by Aryl Migration within Lithiated Urea Derivatives of Tetrahydropyridines. Org Lett 2015; 17:1236-9. [DOI: 10.1021/acs.orglett.5b00199] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael B. Tait
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | | | - Jonathan Clayden
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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14
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Lefranc J, Minassi A, Clayden J. Carbolithiation of N-alkenyl ureas and N-alkenyl carbamates. Beilstein J Org Chem 2013; 9:628-32. [PMID: 23616806 PMCID: PMC3628850 DOI: 10.3762/bjoc.9.70] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 02/24/2013] [Indexed: 11/23/2022] Open
Abstract
N-Alkenyl ureas and N-alkenyl carbamates, like other N-acyl enamines, are typically nucleophilic at their β-carbon. However, by incorporating an α-aryl substituent, we show that they will also undergo attack at the β-carbon by organolithium nucleophiles, leading to the products of carbolithiation. The carbolithiation of E and Z N-alkenyl ureas is diastereospecific, and N-tert-butoxycarbonyl N-alkenyl carbamates give carbolithiation products that may be deprotected in situ to provide a new connective route to hindered amines.
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Affiliation(s)
- Julien Lefranc
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
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15
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Castagnolo D, Foley DJ, Berber H, Luisi R, Clayden J. Carbolithiation of S-Alkenyl-N-aryl Thiocarbamates: Carbanion Arylation in a Connective Route to Tertiary Thiols. Org Lett 2013; 15:2116-9. [DOI: 10.1021/ol400570r] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daniele Castagnolo
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France, and Department of Pharmacy, University of Bari “A. Moro”, Via E. Orabona, 4. I-70125 Bari, Italy
| | - Daniel J. Foley
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France, and Department of Pharmacy, University of Bari “A. Moro”, Via E. Orabona, 4. I-70125 Bari, Italy
| | - Hatice Berber
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France, and Department of Pharmacy, University of Bari “A. Moro”, Via E. Orabona, 4. I-70125 Bari, Italy
| | - Renzo Luisi
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France, and Department of Pharmacy, University of Bari “A. Moro”, Via E. Orabona, 4. I-70125 Bari, Italy
| | - Jonathan Clayden
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, Faculté de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France, and Department of Pharmacy, University of Bari “A. Moro”, Via E. Orabona, 4. I-70125 Bari, Italy
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16
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Johnston AJS, McLaughlin MG, Reid JP, Cook MJ. NaH mediated isomerisation–allylation reaction of 1,3-substituted propenols. Org Biomol Chem 2013; 11:7662-6. [DOI: 10.1039/c3ob41857j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Tait M, Donnard M, Minassi A, Lefranc J, Bechi B, Carbone G, O’Brien P, Clayden J. Amines Bearing Tertiary Substituents by Tandem Enantioselective Carbolithiation–Rearrangement of Vinylureas. Org Lett 2012; 15:34-7. [DOI: 10.1021/ol3029324] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Tait
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., and Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Morgan Donnard
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., and Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Alberto Minassi
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., and Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Julien Lefranc
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., and Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Beatrice Bechi
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., and Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Giorgio Carbone
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., and Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Peter O’Brien
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., and Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Jonathan Clayden
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K., and Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
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18
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Lefranc J, Fournier AM, Mingat G, Herbert S, Marcelli T, Clayden J. Intramolecular Vinylation of Secondary and Tertiary Organolithiums. J Am Chem Soc 2012; 134:7286-9. [DOI: 10.1021/ja301591m] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Julien Lefranc
- School of Chemistry, University of Manchester, Oxford Road,
Manchester M13 9PL, U.K
| | - Anne M. Fournier
- School of Chemistry, University of Manchester, Oxford Road,
Manchester M13 9PL, U.K
| | - Gaëlle Mingat
- School of Chemistry, University of Manchester, Oxford Road,
Manchester M13 9PL, U.K
| | - Simon Herbert
- School of Chemistry, University of Manchester, Oxford Road,
Manchester M13 9PL, U.K
| | - Tommaso Marcelli
- School of Chemistry, University of Manchester, Oxford Road,
Manchester M13 9PL, U.K
- Dipartimento di
Chimica, Materiali e Ingegneria Chimica “Giulio
Natta”, Politecnico di Milano, via
Mancinelli 7, 20131 Milano, Italy
| | - Jonathan Clayden
- School of Chemistry, University of Manchester, Oxford Road,
Manchester M13 9PL, U.K
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19
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Guan ZH, Lei H, Chen M, Ren ZH, Bai Y, Wang YY. Palladium-Catalyzed Carbonylation of Amines: Switchable Approaches to Carbamates and N,N′-Disubstituted Ureas. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100545] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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20
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Velavan A, Sumathi S, Balasubramanian KK. Unsymmetrical tetrasubstituted ureas from tertiary carbamoylimidazole: activation by AlMe3. Org Biomol Chem 2012; 10:6420-31. [DOI: 10.1039/c2ob25412c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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23
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Clayden J, Donnard M, Lefranc J, Tetlow DJ. Quaternary centres bearing nitrogen (α-tertiary amines) as products of molecular rearrangements. Chem Commun (Camb) 2011; 47:4624-39. [DOI: 10.1039/c1cc00049g] [Citation(s) in RCA: 149] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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