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Zhang H, Carlino R, Guillot R, Gil R, Bezzenine S, Hannedouche J. Substrate-Dependent Selectivity in Sc(OTf)3-Catalyzed Cyclization of Alkenoic Acids and N-Protected Alkenamides. Catalysts 2022; 12:1481. [DOI: 10.3390/catal12111481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Five- and six-membered ring lactones and lactams are ubiquitous frameworks in various natural and synthetic molecules and are key building blocks in organic synthesis. Catalytic addition of an O-H or N-H bond across an unactivated C–C double bond is an appealing approach to rapidly access such highly valuable N- and O-containing skeletons in a waste-free and 100% atom efficient process. Herein, we report, for the first time, the efficient and high-yield cyclization of δ/ε-alkenoic acids and N-protected δ-alkenamides catalyzedby practical and easily accessible Lewis acid scandium(III) triflate under thermal and microwave conditions. The selectivity outcome of the reaction of δ/ε-alkenoic acids was dependent on the substitution patterns of the backbone chain and alkene moiety, leading to the exclusive formation of either the corresponding γ/δ-lactones via an O-selective cyclization or the Friedel–Crafts-type product by C-selective cyclization. An uncommon and rarely disclosed O-selective cyclization occurred preferentially or exclusively when N-protected δ-alkenamides were engaged in the reaction. The atom selectivity of the cyclization was unambiguously confirmed by single crystal X-ray crystallography.
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Abstract
The introduction of fluorine atoms into molecules and materials across many fields of academic and industrial research is now commonplace, owing to their unique properties. A particularly interesting feature is the impact of fluorine substitution on the relative orientation of a C-F bond when incorporated into organic molecules. In this Review, we will be discussing the conformational behavior of fluorinated aliphatic carbo- and heterocyclic systems. The conformational preference of each system is associated with various interactions introduced by fluorine substitution such as charge-dipole, dipole-dipole, and hyperconjugative interactions. The contribution of each interaction on the stabilization of the fluorinated alicyclic system, which manifests itself in low conformations, will be discussed in detail. The novelty of this feature will be demonstrated by presenting the most recent applications.
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Affiliation(s)
- Rajarshi Mondal
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
| | - Mohamed Agbaria
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
| | - Zackaria Nairoukh
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
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Affiliation(s)
- Yunhe Lv
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455000, China
- Jilin Provincial Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University, Changchun, Jilin 130024, China
| | - Weiya Pu
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455000, China
| | - Lihan Shi
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455000, China
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Niwa T, Ujiie K, Sato H, Egami H, Hamashima Y. Asymmetric Fluorination of Cyclic Tetrasubstituted Alkenes with a Pendant Amide Groups under Dianionic Phase-Transfer Catalysis. Chem Pharm Bull (Tokyo) 2018; 66:920-922. [DOI: 10.1248/cpb.c18-00551] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Tomoki Niwa
- School of Pharmaceutical Sciences, University of Shizuoka
| | - Kiyoshi Ujiie
- School of Pharmaceutical Sciences, University of Shizuoka
| | - Hitomi Sato
- School of Pharmaceutical Sciences, University of Shizuoka
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Abstract
A cobalt-catalyzed cross-coupling between α-bromo amides and Grignard reagents is disclosed. The reaction is general and allows access to a large variety of α-aryl and β,γ-unsaturated amides. Some mechanistic investigations have been undertaken to determine the nature of the intermediate species.
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Affiliation(s)
- E Barde
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231, ESPCI Paris/CNRS/PSL Research University, 10 rue Vauquelin 75231 Paris Cedex 05, France
| | - A Guérinot
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231, ESPCI Paris/CNRS/PSL Research University, 10 rue Vauquelin 75231 Paris Cedex 05, France
| | - J Cossy
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231, ESPCI Paris/CNRS/PSL Research University, 10 rue Vauquelin 75231 Paris Cedex 05, France
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Nagamoto M, Yanagi T, Nishimura T, Yorimitsu H. Asymmetric Cyclization of N-Sulfonyl Alkenyl Amides Catalyzed by Iridium/Chiral Diene Complexes. Org Lett 2016; 18:4474-7. [DOI: 10.1021/acs.orglett.6b01954] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Midori Nagamoto
- Department
of Chemistry,
Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Tomoyuki Yanagi
- Department
of Chemistry,
Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Takahiro Nishimura
- Department
of Chemistry,
Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Hideki Yorimitsu
- Department
of Chemistry,
Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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Affiliation(s)
- Satoru Arimitsu
- Department of Chemistry,
Biology and Marine Science, University of the Ryukyus, Senbaru
1, Nishihara, Nakagami, Okinawa 903-0123, Japan
| | - Makoto Nakasone
- Department of Chemistry,
Biology and Marine Science, University of the Ryukyus, Senbaru
1, Nishihara, Nakagami, Okinawa 903-0123, Japan
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Gesmundo NJ, Grandjean JMM, Nicewicz DA. Amide and amine nucleophiles in polar radical crossover cycloadditions: synthesis of γ-lactams and pyrrolidines. Org Lett 2015; 17:1316-9. [PMID: 25695366 DOI: 10.1021/acs.orglett.5b00316] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this work we present a direct catalytic synthesis of γ-lactams and pyrrolidines from alkenes and activated unsaturated amides or protected unsaturated amines, respectively. Using a mesityl acridinium single electron photooxidant and a thiophenol cocatalyst under irradiation, we are able to directly forge these important classes of heterocycles with complete regiocontrol.
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Affiliation(s)
- Nathan J Gesmundo
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
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Takesue T, Fujita M, Sugimura T, Akutsu H. A Series of Two Oxidation Reactions of ortho-Alkenylbenzamide with Hypervalent Iodine(III): A Concise Entry into (3R,4R)-4-Hydroxymellein and (3R,4R)-4-Hydroxy-6-methoxymellein. Org Lett 2014; 16:4634-7. [DOI: 10.1021/ol502225p] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Takuya Takesue
- Graduate
School of Material
Science, University of Hyogo, Kohto, Kamigori, Hyogo 678-1297, Japan
| | - Morifumi Fujita
- Graduate
School of Material
Science, University of Hyogo, Kohto, Kamigori, Hyogo 678-1297, Japan
| | - Takashi Sugimura
- Graduate
School of Material
Science, University of Hyogo, Kohto, Kamigori, Hyogo 678-1297, Japan
| | - Hiroki Akutsu
- Graduate
School of Material
Science, University of Hyogo, Kohto, Kamigori, Hyogo 678-1297, Japan
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