1
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Maag H, Lemcke DJ, Wahl JM. Ring opening of photogenerated azetidinols as a strategy for the synthesis of aminodioxolanes. Beilstein J Org Chem 2024; 20:1671-1676. [PMID: 39076297 PMCID: PMC11285075 DOI: 10.3762/bjoc.20.148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Accepted: 07/11/2024] [Indexed: 07/31/2024] Open
Abstract
α-Aminoacetophenones are identified as promising building blocks for the synthesis of highly substituted dioxolanes. The presented strategy is founded on the build and release of molecular strain and achieves a formal transposition of a methyl group. During light irradiation, 3-phenylazetidinols are forged as reaction intermediates, which readily undergo ring opening upon the addition of electron-deficient ketones or boronic acids. Key to the successful development of this two-step process is the identification of a benzhydryl-protecting group, which orchestrates the photochemical Norrish-Yang cyclization and facilitates the subsequent ring opening.
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Affiliation(s)
- Henning Maag
- Department Chemie, Johannes Gutenberg-Universität, Duesbergweg 10–14, 55128 Mainz, Germany
| | - Daniel J Lemcke
- Department Chemie, Johannes Gutenberg-Universität, Duesbergweg 10–14, 55128 Mainz, Germany
| | - Johannes M Wahl
- Department Chemie, Johannes Gutenberg-Universität, Duesbergweg 10–14, 55128 Mainz, Germany
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2
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Wang Z, Chen X, Hu Y, Li H, Yang YF, Liu Y, Jin H, Zhou B. Deconstructive isomerization of azetidinols via C-C bond cleavage enabled by N-heterocyclic carbene (NHC) catalysis. Chem Commun (Camb) 2022; 58:9294-9297. [PMID: 35904428 DOI: 10.1039/d2cc03104c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we describe an N-heterocyclic carbene (NHC)-catalyzed deconstructive isomerization of azetidinols via an inert C-C bond cleavage. It provides a direct and supplementary pathway to access α-amino ketone and oxazol-2-one derivatives in moderate to good yields. DFT calculation supports the proposed mechanism in which NHC undergoes a concerted proton transfer and ring-opening process. This reaction features non-metal catalysis, simple reaction operation, excellent regioselectivity and gram-scale synthesis.
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Affiliation(s)
- Zhen Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Xue Chen
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Yunayuan Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Huiling Li
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Yun-Fang Yang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Yunkui Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Hongwei Jin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Bingwei Zhou
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
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3
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Fang Z, Jin Q, Wang X, Ning Y. Metal-free [2 + 1 + 3] Cycloaddition of Trifluoroacetaldehyde N-Sulfonylhydrazones with Hexahydro-1,3,5-triazines Leading to Trifluoromethylated 2,3,4,5-Tetrahydro-1,2,4-triazines. J Org Chem 2022; 87:2966-2974. [PMID: 35133818 DOI: 10.1021/acs.joc.1c02810] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A transition-metal-free [2 + 1 + 3] cycloaddition of trifluoroacetaldehyde N-sulfonylhydrazone and hexahydro-1,3,5-triazine was described. This operationally simple protocol provides a general synthesis of diverse trifluoromethylated 2,3,4,5-tetrahydro-1,2,4-triazines in 81-97% yield with a broad substrate scope, including aryl, benzyl, and alkyl hexahydro-1,3,5-triazine.
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Affiliation(s)
- Zhongxue Fang
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224007, China
| | - Qihao Jin
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224007, China
| | - Xinyu Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yongquan Ning
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
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4
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Tayama E, Kawai K. Synthesis of tertiary alkyl fluorides and chlorides by site-selective nucleophilic ring-opening reaction of α-aryl azetidinium salts. RSC Adv 2021; 11:39607-39618. [PMID: 35492462 PMCID: PMC9044468 DOI: 10.1039/d1ra08706a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 12/03/2021] [Indexed: 12/24/2022] Open
Abstract
Site-selective nucleophilic ring-opening reactions of 2-arylazetidine-2-carboxylic acid ester-derived tetraalkyl ammonium salts 2 with tetrabutylammonium halides (Bu4NX) to give tertiary alkyl halides are successfully demonstrated. For example, a nucleophilic ring-opening reaction of 2-(o-tolyl) derivative 2a with 1.2 equivalents of tetrabutylammonium fluoride (Bu4NF) in THF at 60 °C preferentially proceeded at a more substituted carbon atom (2-position) compared to a less-substituted carbon atom (4-position) and afforded tert-butyl 4-(dimethylamino)-2-fluoro-2-(o-tolyl)butanoate 3aa in 71% yield as the corresponding tertiary alkyl fluoride. This result was applied to synthesize optically active organofluorine compounds starting from commercially available (R)-1-phenylethylamine. Site-selective nucleophilic ring-opening of 2 with Bu4NX proceeded at a much-substituted 2-position preferentially and produced tertiary alkyl halides 3.![]()
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Affiliation(s)
- Eiji Tayama
- Department of Chemistry, Faculty of Science, Niigata University Niigata 950-2181 Japan
| | - Kohei Kawai
- Graduate School of Science and Technology, Niigata University Niigata 950-2181 Japan
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5
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Abstract
Azetidinium salts are important motifs in organic synthesis but are difficult to obtain due to extremely long synthetic protocols. Herein, a rapid continuous-flow process for the on-demand synthesis of azetidinium salts is described. In particular, the nucleophilic addition of secondary amines and the subsequent intramolecular N-cyclization have been investigated in batch and continuous-flow modes, exploring the effects of solvent type, temperature, reaction time, and amine substituent on the synthesis of azetidinium salts. This has enabled us to quickly identify optimal reaction conditions and obtain microkinetic parameters, verifying that the use of a flow reactor leads to a reduction of the activation energy for the epichlorohydrin aminolysis due to the better control of mass and heat transfer during reaction. This confirms the key role of continuous-flow technologies to affect the kinetics of a reaction and make synthetic protocols ultrarapid and more efficient.
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Affiliation(s)
- Alessandra Sivo
- Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, IT-20133 Milano, Italy
| | - Vincenzo Ruta
- Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, IT-20133 Milano, Italy
| | - Gianvito Vilé
- Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, IT-20133 Milano, Italy
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6
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Fominova K, Diachuk T, Granat D, Savchuk T, Vilchynskyi V, Svitlychnyi O, Meliantsev V, Kovalchuk I, Litskan E, Levterov VV, Badlo VR, Vaskevych RI, Vaskevych AI, Bolbut AV, Semeno VV, Iminov R, Shvydenko K, Kuznetsova AS, Dmytriv YV, Vysochyn D, Ripenko V, Tolmachev AA, Pavlova O, Kuznietsova H, Pishel I, Borysko P, Mykhailiuk PK. Oxa-spirocycles: synthesis, properties and applications. Chem Sci 2021; 12:11294-11305. [PMID: 34667540 PMCID: PMC8447932 DOI: 10.1039/d1sc03615g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 07/20/2021] [Indexed: 12/27/2022] Open
Abstract
A general approach to a new generation of spirocyclic molecules – oxa-spirocycles – was developed. The key synthetic step was iodocyclization. More than 150 oxa-spirocyclic compounds were prepared. Incorporation of an oxygen atom into the spirocyclic unit dramatically improved water solubility (by up to 40 times) and lowered lipophilicity. More potent oxa-spirocyclic analogues of antihypertensive drug terazosin were synthesized and studied in vivo. A general practical approach to a new generation of spirocyclic molecules – oxa-spirocycles – is developed.![]()
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Affiliation(s)
- Kateryna Fominova
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Taras Diachuk
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Dmitry Granat
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Taras Savchuk
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Vladyslav Vilchynskyi
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Oleksiy Svitlychnyi
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Vladyslav Meliantsev
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Igor Kovalchuk
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Eduard Litskan
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Vadym V Levterov
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Valentyn R Badlo
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Ruslan I Vaskevych
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine Murmanska St. 5 02094 Kyiv Ukraine
| | - Alla I Vaskevych
- National Technical University of Ukraine, Igor Sikorsky Kiev Polytechnic Institute Prosp. Peremohy 37 03056 Kyiv Ukraine
| | - Andrii V Bolbut
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine Murmanska St. 5 02094 Kyiv Ukraine
| | - Volodymyr V Semeno
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Rustam Iminov
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Kostiantyn Shvydenko
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine Murmanska St. 5 02094 Kyiv Ukraine
| | | | - Yurii V Dmytriv
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org.,National Technical University of Ukraine, Igor Sikorsky Kiev Polytechnic Institute Prosp. Peremohy 37 03056 Kyiv Ukraine
| | - Daniil Vysochyn
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Vasyl Ripenko
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | - Andrei A Tolmachev
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
| | | | | | - Iryna Pishel
- Bienta Chervonotkatska 78 02094 Kyiv Ukraine http://www.bienta.net
| | - Petro Borysko
- Bienta Chervonotkatska 78 02094 Kyiv Ukraine http://www.bienta.net
| | - Pavel K Mykhailiuk
- Enamine Ltd Chervonotkatska 78 02094 Kyiv Ukraine http://www.enamine.net http://www.mykhailiukchem.org
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7
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Tayama E, Nakanome N. Synthesis of optically active 2-substituted azetidine-2-carbonitriles from chiral 1-arylethylamine via α-alkylation of N-borane complexes. RSC Adv 2021; 11:23825-23837. [PMID: 35479785 PMCID: PMC9036535 DOI: 10.1039/d1ra04585g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 06/30/2021] [Indexed: 11/23/2022] Open
Abstract
The base-promoted α-alkylation of N-((S)-1-arylethyl)azetidine-2-carbonitriles 3via formation of their N-borane complexes 4 was investigated. For example, treatment of diastereomerically pure borane N-((S)-1'-(4''-methoxyphenyl)ethyl)azetidine-2-carbonitrile complex (1S,2S,1'S)-4b with 1.2 equivalents of LDA at -78 °C followed by 1.3 equivalents of benzyl bromide at -78 °C and warming to room temperature produced α-benzylated (2S,1'S)-5ba in 72% yield and (2R,1'S)-5ba in 2% yield. A mechanism for this diastereoselective α-alkylation was proposed. Our method enables the production of optically active 2-substituted azetidine-2-carbonitriles, such as α-benzylated (S)-10a and (R)-10a, starting from commercially available (S)-(1-(4-methoxyphenyl)ethyl)amine.
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Affiliation(s)
- Eiji Tayama
- Department of Chemistry, Faculty of Science, Niigata University Niigata 950-2181 Japan
| | - Nobuhiro Nakanome
- Graduate School of Science and Technology, Niigata University Niigata 950-2181 Japan
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8
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Masson G, Gomez Pardo D, Cossy J. Ring-opening of azetidiniums by nucleophiles. Synthesis of polysubstituted linear amines. Chirality 2020; 33:5-21. [PMID: 33201588 DOI: 10.1002/chir.23280] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 09/14/2020] [Accepted: 09/17/2020] [Indexed: 11/10/2022]
Abstract
This microreview focuses on the nucleophilic ring-opening of azetidiniums presenting various substitution patterns at C2, C3, and C4. In most cases, the nucleophilic ring-opening occurred in a stereoselective and regioselective fashion producing functionalized linear amines. Experimental selectivities associated with Density Functional Theory (DFT) calculations have allowed a better understanding of the parameters governing the regioselectivities.
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Affiliation(s)
- Guillaume Masson
- Molecular, Macromolecular Chemistry and Materials, ESPCI Paris, CNRS, PSL University, Paris, France
| | - Domingo Gomez Pardo
- Molecular, Macromolecular Chemistry and Materials, ESPCI Paris, CNRS, PSL University, Paris, France
| | - Janine Cossy
- Molecular, Macromolecular Chemistry and Materials, ESPCI Paris, CNRS, PSL University, Paris, France
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9
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Bugera M, Trofymchuk S, Tarasenko K, Zaporozhets O, Pustovit Y, Mykhailiuk PK. Deoxofluorination of Aliphatic Carboxylic Acids: A Route to Trifluoromethyl-Substituted Derivatives. J Org Chem 2019; 84:16105-16115. [PMID: 31714081 DOI: 10.1021/acs.joc.9b02596] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A practical method for the synthesis of functionalized aliphatic trifluoromethyl-substituted derivatives from aliphatic acids is developed. The transformation proceeds with sulfur tetrafluoride in the presence of water as a key additive. Compared to previous methods, the reaction gives products with full retention of stereo- and absolute configuration of chiral centers.
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Affiliation(s)
- Maksym Bugera
- Enamine Limited , Chervonotkatska 78 , 02094 Kyiv , Ukraine.,V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine , Murmanska 1 , 02094 Kyiv , Ukraine
| | - Serhii Trofymchuk
- Enamine Limited , Chervonotkatska 78 , 02094 Kyiv , Ukraine.,Institute of Organic Chemistry NAS of Ukraine , Murmanskaya 5 , 02094 Kyiv , Ukraine
| | - Karen Tarasenko
- Enamine Limited , Chervonotkatska 78 , 02094 Kyiv , Ukraine.,V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine , Murmanska 1 , 02094 Kyiv , Ukraine
| | - Olga Zaporozhets
- Chemistry Department , Taras Shevchenko National University of Kyiv , Volodymyrska 64 , 01601 Kyiv , Ukraine
| | - Yurii Pustovit
- Enamine Limited , Chervonotkatska 78 , 02094 Kyiv , Ukraine.,Institute of Organic Chemistry NAS of Ukraine , Murmanskaya 5 , 02094 Kyiv , Ukraine
| | - Pavel K Mykhailiuk
- Enamine Limited , Chervonotkatska 78 , 02094 Kyiv , Ukraine.,Chemistry Department , Taras Shevchenko National University of Kyiv , Volodymyrska 64 , 01601 Kyiv , Ukraine
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10
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Molga K, Gajewska EP, Szymkuć S, Grzybowski BA. The logic of translating chemical knowledge into machine-processable forms: a modern playground for physical-organic chemistry. REACT CHEM ENG 2019. [DOI: 10.1039/c9re00076c] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
With renewed interest and significant progress in computer-assisted synthetic planning, it is essential to codify the logic that should be followed when translating organic synthetic knowledge into reaction rules understandable to the machine.
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Affiliation(s)
- Karol Molga
- Institute of Organic Chemistry
- Polish Academy of Sciences
- Warsaw 01-224
- Poland
| | - Ewa P. Gajewska
- Institute of Organic Chemistry
- Polish Academy of Sciences
- Warsaw 01-224
- Poland
| | - Sara Szymkuć
- Institute of Organic Chemistry
- Polish Academy of Sciences
- Warsaw 01-224
- Poland
| | - Bartosz A. Grzybowski
- Institute of Organic Chemistry
- Polish Academy of Sciences
- Warsaw 01-224
- Poland
- IBS Center for Soft and Living Matter and Department of Chemistry
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11
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Yang S, Wang L, Zhang H, Liu C, Zhang L, Wang X, Zhang G, Li Y, Zhang Q. Copper-Catalyzed Asymmetric Aminocyanation of Arylcyclopropanes for Synthesis of γ-Amino Nitriles. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03768] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Shengbiao Yang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Lihong Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Hongwei Zhang
- College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Chunyang Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Linli Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xiaomin Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Ge Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yan Li
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Qian Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
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12
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Shehzadi SA, Kushwaha K, Sterckx H, Abbaspour Tehrani K. Zn(OTf)2
-Catalyzed Synthesis of 2-Alkynylazetidines and their Ring Expansion to Functionalized 1,4,5,6-Tetrahydropyridines. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800932] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Syeda Aaliya Shehzadi
- Organic Synthesis, Department of Chemistry; University of Antwerp; Groenenborgerlaan 171, B- 2020 Antwerp Belgium
| | - Khushbu Kushwaha
- Organic Synthesis, Department of Chemistry; University of Antwerp; Groenenborgerlaan 171, B- 2020 Antwerp Belgium
| | - Hans Sterckx
- Organic Synthesis, Department of Chemistry; University of Antwerp; Groenenborgerlaan 171, B- 2020 Antwerp Belgium
| | - Kourosch Abbaspour Tehrani
- Organic Synthesis, Department of Chemistry; University of Antwerp; Groenenborgerlaan 171, B- 2020 Antwerp Belgium
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13
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Neouchy Z, Gomez Pardo D, Cossy J. Synthesis of Optically Active α-Trifluoromethylamines by Rearrangement of β-Amino-α-trifluoromethyl Alcohols. Org Lett 2018; 20:6017-6021. [PMID: 30216084 DOI: 10.1021/acs.orglett.8b02353] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis of various optically active α-trifluoromethylamines has been realized from β-amino-α-trifluoromethyl alcohols via an aziridinium ion intermediate under kinetic conditions.
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Affiliation(s)
- Zeina Neouchy
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI) , ESPCI Paris/CNRS/PSL University , 10 rue Vauquelin , 75231 Cedex 05 Paris , France
| | - Domingo Gomez Pardo
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI) , ESPCI Paris/CNRS/PSL University , 10 rue Vauquelin , 75231 Cedex 05 Paris , France
| | - Janine Cossy
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI) , ESPCI Paris/CNRS/PSL University , 10 rue Vauquelin , 75231 Cedex 05 Paris , France
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14
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Dao Thi H, Goossens H, Hertsen D, Otte V, Van Nguyen T, Van Speybroeck V, D'hooghe M. Formation of Fluorinated Amido Esters through Unexpected C3-C4 Bond Fission in 4-Trifluoromethyl-3-oxo-β-lactams. Chem Asian J 2018; 13:421-431. [PMID: 29316332 DOI: 10.1002/asia.201701636] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 01/08/2018] [Indexed: 11/07/2022]
Abstract
4-Trifluoromethyl-3-oxo-β-lactams were unexpectedly transformed into 2-[(2,2-difluorovinyl)amino]-2-oxoacetates as major products, accompanied by minor amounts of 2-oxo-2-[(2,2,2-trifluoroethyl)amino]acetates, upon treatment with alkyl halides and triethylamine in DMSO. This peculiar C3-C4 bond fission reactivity was investigated in-depth, from both an experimental and a computational point of view, in order to shed light on the underlying reaction mechanism.
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Affiliation(s)
- Hang Dao Thi
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, CauGiay, Hanoi, Vietnam
| | - Hannelore Goossens
- Center for Molecular Modeling, Ghent University, Technologiepark 903, 9052, Zwijnaarde, Belgium
| | - Dietmar Hertsen
- Center for Molecular Modeling, Ghent University, Technologiepark 903, 9052, Zwijnaarde, Belgium
| | - Valerie Otte
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
- Center for Molecular Modeling, Ghent University, Technologiepark 903, 9052, Zwijnaarde, Belgium
| | - Tuyen Van Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, CauGiay, Hanoi, Vietnam
| | | | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
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15
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16
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Wright K, Drouillat B, Menguy L, Marrot J, Couty F. The von Braun Reaction Applied to Azetidines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701443] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Karen Wright
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles St-Quentin-en-Yvelines; Université Paris Saclay; 45 av. des Etats-Unis 78035 Versailles Cedex France
| | - Bruno Drouillat
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles St-Quentin-en-Yvelines; Université Paris Saclay; 45 av. des Etats-Unis 78035 Versailles Cedex France
| | - Laurence Menguy
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles St-Quentin-en-Yvelines; Université Paris Saclay; 45 av. des Etats-Unis 78035 Versailles Cedex France
| | - Jérôme Marrot
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles St-Quentin-en-Yvelines; Université Paris Saclay; 45 av. des Etats-Unis 78035 Versailles Cedex France
| | - François Couty
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles St-Quentin-en-Yvelines; Université Paris Saclay; 45 av. des Etats-Unis 78035 Versailles Cedex France
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17
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Grellepois F, Ben Jamaa A, Saraiva Rosa N. α-Trifluoromethylated tertiary homoallylic amines: diastereoselective synthesis and conversion into β-aminoesters, γ- and δ-aminoalcohols, azetidines and pyrrolidines. Org Biomol Chem 2017; 15:9696-9709. [PMID: 29125173 DOI: 10.1039/c7ob02506h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The diastereoselective addition of allyl zinc and allylindium derivatives to α-trifluoromethyl N-tert-butanesulfinyl hemiaminals, bench stable precursors of aryl and alkyl trifluoromethyl ketimines, allows the synthesis of homoallylic amines containing a tetrasubstituted carbon stereocentre bearing a trifluoromethyl group with good diastereoselectivities (up to dr > 99 : 1). This approach was also suitable for accessing chiral homoallylic amines bearing two contiguous stereocenters. The synthetic usefulness of N-tert-butanesulfinyl homoallylamines was illustrated by preparing various trifluoromethylated nitrogen containing bifunctional synthons (aminoesters, aminoalcohols) and small azaheterocycles (azetidines, pyrrolidines).
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Affiliation(s)
- Fabienne Grellepois
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR des Sciences Exactes et Naturelles, BP 1039, 51687 Reims Cedex 2, France.
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18
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Okitsu T, Kobayashi K, Kan R, Yoshida Y, Matsui Y, Wada A. 3-Methylene-4-amido-1,2-diazetidine as a Formal 1,4-Dipole Precursor: Lewis Acid-Catalyzed Nucleophilic Addition with Silylated Nucleophiles. Org Lett 2017; 19:4592-4595. [DOI: 10.1021/acs.orglett.7b02194] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takashi Okitsu
- Department of Organic Chemistry
for Life Sciences, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Keiko Kobayashi
- Department of Organic Chemistry
for Life Sciences, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Ryosuke Kan
- Department of Organic Chemistry
for Life Sciences, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Yuji Yoshida
- Department of Organic Chemistry
for Life Sciences, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Yuki Matsui
- Department of Organic Chemistry
for Life Sciences, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Akimori Wada
- Department of Organic Chemistry
for Life Sciences, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
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19
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Ma H, Zhang X, Chen L, Yu W. A Domino Azidation/C–H Amination Approach toward Trifluoromethyl Substituted Imidazoles. J Org Chem 2017; 82:11841-11847. [DOI: 10.1021/acs.joc.7b01361] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Haichao Ma
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Xiaoyan Zhang
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Liangliang Chen
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Wei Yu
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
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20
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Mehra V, Lumb I, Anand A, Kumar V. Recent advances in synthetic facets of immensely reactive azetidines. RSC Adv 2017. [DOI: 10.1039/c7ra08884a] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Recent developments in synthetic strategies towards functionalized azetidines along with their versatility as heterocyclic synthons.
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Affiliation(s)
- Vishu Mehra
- Department of Chemistry
- Hindu College
- Amritsar-143005
- India
| | - Isha Lumb
- Department of Chemistry
- Baring Union Christian College
- Batala-143505
- India
| | - Amit Anand
- Department of Chemistry
- Khalsa College
- Amritsar-143005
- India
| | - Vipan Kumar
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar-143005
- India
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21
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Dao Thi H, Danneels B, Desmet T, Van Hecke K, Van Nguyen T, D'hooghe M. Synthesis and Applications of 3-Methylene-4-(trifluoromethyl)azetidin-2-ones as Building Blocks for the Preparation of Mono- and Spirocyclic 4-CF3-β-Lactams. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600387] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hang Dao Thi
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
- Institute of Chemistry; Vietnam Academy of Science and Technology; 18-Hoang Quoc Viet CauGiay Hanoi Vietnam
| | - Barbara Danneels
- Centre for Industrial Biotechnology and Biocatalysis; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Tom Desmet
- Centre for Industrial Biotechnology and Biocatalysis; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Kristof Van Hecke
- XStruct, Department of Inorganic and Physical Chemistry; Ghent University; Krijgslaan 281-S3 B-9000 Ghent Belgium
| | - Tuyen Van Nguyen
- Institute of Chemistry; Vietnam Academy of Science and Technology; 18-Hoang Quoc Viet CauGiay Hanoi Vietnam
| | - Matthias D'hooghe
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
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22
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Drouillat B, Dorogan IV, Kletskii M, Burov ON, Couty F. Competitive Ring Expansion of Azetidines into Pyrrolidines and/or Azepanes. J Org Chem 2016; 81:6677-85. [PMID: 27398926 DOI: 10.1021/acs.joc.6b01325] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Azetidines fitted with a 3-hydroxypropyl side chain at the 2-position undergo intramolecular N-alkylation after activation of the primary alcohol, and the produced 1-azonia-bicyclo[3.2.0]heptane is opened by different nucleophiles (cyanide, azide, or acetate anions) to produce mixtures of ring expanded pyrrolidines and azepanes, or a unique type of compound. Distribution of produced five- or seven-membered rings depends on the substitution pattern on the azetidine ring and on its side chain, together with the nature of the nucleophile used in the expansion process. Observed regioselectivities for nucleophilic opening are rationalized by quantum mechanical DFT calculations and are in good agreement with experimental results.
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Affiliation(s)
- Bruno Drouillat
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay - 45 , av. des Etats-Unis, 78035 Versailles Cedex, France
| | - Igor V Dorogan
- Institute of Physical and Organic Chemistry, Southern Federal University , 194/2 Stachka Ave., 344090 Rostov-on-Don, Russian Federation
| | - Mikhail Kletskii
- Department of Chemistry, Southern Federal University , 7, Zorge St., 344090, Rostov-on-Don, Russian Federation
| | - Oleg N Burov
- Department of Chemistry, Southern Federal University , 7, Zorge St., 344090, Rostov-on-Don, Russian Federation
| | - François Couty
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay - 45 , av. des Etats-Unis, 78035 Versailles Cedex, France
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23
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Orienti I, Falconi M, Teti G, Currier MA, Wang J, Phelps M, Cripe TP. Preparation and Evaluation of a Novel Class of Amphiphilic Amines as Antitumor Agents and Nanocarriers for Bioactive Molecules. Pharm Res 2016; 33:2722-35. [PMID: 27457066 PMCID: PMC5040747 DOI: 10.1007/s11095-016-1999-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 07/11/2016] [Indexed: 12/15/2022]
Abstract
Purpose We describe a novel class of antitumor amphiphilic amines (RCn) based on a tricyclic amine hydrophilic head and a hydrophobic linear alkyl tail of variable length. Methods We tested the lead compound, RC16, for cytotoxicity and mechanism of cell death in several cancer cell lines, anti tumor efficacy in mouse tumor models, and ability to encapsulate chemotherapy drugs. Results These compounds displayed strong cytotoxic activity against cell lines derived from both pediatric and adult cancers. The IC50 of the lead compound, RC16, for normal cells including human keratinocytes, human fibroblasts and human umbilical vein endothelial cells was tenfold higher than for tumor cells. RC16 exhibited significant antitumor effects in vivo using several human xenografts and a metastatic model of murine neuroblastoma by both intravenous and oral administration routes. The amphiphilic character of RC16 triggered a spontaneous molecular self-assembling in water with formation of micelles allowing complexation of Doxorubicin, Etoposide and Paclitaxel. These micelles significantly improved the in vitro antitumor activity of these drugs as the enhancement of their aqueous solubility also improved their biologic availability. Conclusions RC16 and related amphiphilic amines may be useful as a novel cancer treatment. Electronic supplementary material The online version of this article (doi:10.1007/s11095-016-1999-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Isabella Orienti
- Department of Pharmacy and Biotechnology, University of Bologna, Via S. Donato 19/2, Bologna, Italy
| | - Mirella Falconi
- Department for Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, via Irnerio 48, Bologna, Italy
| | - Gabriella Teti
- Department for Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, via Irnerio 48, Bologna, Italy
| | - Mark A Currier
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Jiang Wang
- College of Pharmacy and Division of Pharmaceutics, The Ohio State University Comprehensive Cancer Center, Columbus, Ohio, 43210, USA
| | - Mitch Phelps
- College of Pharmacy and Division of Pharmaceutics, The Ohio State University Comprehensive Cancer Center, Columbus, Ohio, 43210, USA
| | - Timothy P Cripe
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, Columbus, Ohio, USA.
- Division of Hematology/Oncology/Blood and Marrow Transplant, Nationwide Children's Hospital, 700 Children's Dr, Columbus, Ohio, 43205, USA.
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24
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Dowling MS, Fernando DP, Hou J, Liu B, Smith AC. Two Scalable Syntheses of (S)-2-Methylazetidine. J Org Chem 2016; 81:3031-6. [PMID: 26895201 DOI: 10.1021/acs.joc.6b00149] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Two orthogonal routes for preparing (S)-2-methylazetidine as a bench stable, crystalline (R)-(-)-CSA salt are presented. One route features the in situ generation and cyclization of a 1,3-bis-triflate to form the azetidine ring, while the second route involves chemoselective reduction of N-Boc azetidine-2-carboxylic acid. Both sequences afford the desired product in good overall yields (61% and 49%) and high enantiomeric excess (>99% ee), avoid column chromatography, and are suitable for the large-scale production of this material.
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Affiliation(s)
- Matthew S Dowling
- Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Dilinie P Fernando
- Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Jie Hou
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Bo Liu
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Aaron C Smith
- Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
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25
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Lugiņina J, Uzuleņa J, Posevins D, Turks M. Ring-Opening of Carbamate-Protected Aziridines and Azetidines in Liquid Sulfur Dioxide. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600141] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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26
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Zhou X, Xu X, Li Y, Zhang Z, Zheng ZB. Synthesis of chiral 4,5-dihydrothiazol-2-amines and 4,5-dihydrooxazol-2-amines through an unexpected ring opening reaction of azetidines. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Meyer F. Trifluoromethyl nitrogen heterocycles: synthetic aspects and potential biological targets. Chem Commun (Camb) 2016; 52:3077-94. [DOI: 10.1039/c5cc09414c] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The synthetic methodologies and the potential biological targets of α-trifluoromethylated nitrogen heterocycles are presented.
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Affiliation(s)
- F. Meyer
- Laboratory of Biopolymers and Supramolecular Nanomaterials
- Faculty of Pharmacy
- Université Libre de Bruxelles (ULB)
- 1050 Bruxelles
- Belgium
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28
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29
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Gurry M, McArdle P, Aldabbagh F. Synthesis of a Spirocyclic Oxetane-Fused Benzimidazole. Molecules 2015; 20:13864-74. [PMID: 26263961 PMCID: PMC6332447 DOI: 10.3390/molecules200813864] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 07/22/2015] [Accepted: 07/24/2015] [Indexed: 11/30/2022] Open
Abstract
A new synthesis of 2-oxa-7-azaspiro[3.5]nonane is described. Spirocyclic oxetanes, including 2-oxa-6-azaspiro[3.3]heptane were converted into o-cycloalkylaminoacetanilides for oxidative cyclizations using Oxone® in formic acid. The expanded spirocyclic oxetane successfully gave the [1,2-a] ring-fused benzimidazole. X-ray crystal structure of the resultant new tetracyclic system, 1ʹ,2ʹ-dihydro-4ʹH-spiro[oxetane-3,3ʹ-pyrido[1,2-a]benzimidazole] and the azetidine ring-opened adduct, N-(2-acetamido-4-bromophenyl)-N-{[3-(chloromethyl)oxetan-3-yl]methyl}acetamide are disclosed.
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Affiliation(s)
- Michael Gurry
- School of Chemistry, National University of Ireland Galway, University Road, Galway SW4 NUI, Ireland.
| | - Patrick McArdle
- School of Chemistry, National University of Ireland Galway, University Road, Galway SW4 NUI, Ireland.
| | - Fawaz Aldabbagh
- School of Chemistry, National University of Ireland Galway, University Road, Galway SW4 NUI, Ireland.
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30
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Wang Z, Sheong FK, Sung HHY, Williams ID, Lin Z, Sun J. Catalytic Enantioselective Intermolecular Desymmetrization of Azetidines. J Am Chem Soc 2015; 137:5895-8. [DOI: 10.1021/jacs.5b03083] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Zhaobin Wang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Fu Kit Sheong
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Herman H. Y. Sung
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Ian D. Williams
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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31
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Lensen N, Marais J, Brigaud T. Straightforward synthesis of novel enantiopure α-trifluoromethylated azetidine 2-carboxylic acid and homoserines. Org Lett 2015; 17:342-5. [PMID: 25560883 DOI: 10.1021/ol503448w] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The straightforward syntheses of enantiopure (2R)-2-trifluoromethyl-2-carboxyazetidine and (R)- and (S)-trifluoromethylhomoserines are reported. The key step is a Strecker-type reaction on a common chiral CF3-containing bicyclic oxazolidine intermediate obtained by a condensation reaction of (R)-phenylglycinol and ethyl-4,4,4-trifluoroacetoacetate (ETFAA).
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Affiliation(s)
- Nathalie Lensen
- Laboratoire de Chimie Biologique (LCB), EA 4505, Université de Cergy-Pontoise , 5 Mail, Gay-Lussac, Neuville sur Oise, 95000 Cergy-Pontoise Cedex, France
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32
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Synthesis of α-CF3 azanorbornene and azetidines by aza Diels–Alder or iodine-mediated cyclizations: application in ROMP and ligand design. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.09.105] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Moens M, De Kimpe N, D'hooghe M. Selective synthesis of cis- and trans-2-(methyl/phenyl)-3-(trifluoromethyl)aziridines and their regio- and stereospecific ring opening. J Org Chem 2014; 79:5558-68. [PMID: 24845942 DOI: 10.1021/jo5007448] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convenient and stereoselective approach toward cis- and trans-1-alkyl-2-(methyl/phenyl)-3-(trifluoromethyl)aziridines was developed starting from the corresponding α,α,α-trifluoroketones via imination, α-chlorination, and hydride-induced ring closure. The reactivity of these newly synthesized nonactivated α-CF3-aziridines was evaluated by applying N-protonation or N-alkylation to effect regio- and stereospecific aziridine ring opening by oxygen, halogen, sulfur, and nitrogen nucleophiles. Furthermore, nonactivated α-CF3-aziridines were easily transformed into their activated analogues by replacing the N-benzyl protecting group with a N-tosyl group, rendering these α-CF3-aziridines much more susceptible to nucleophilic ring opening.
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Affiliation(s)
- Matthias Moens
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University , Coupure Links 653, B-9000 Ghent, Belgium
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34
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Artamonov OS, Slobodyanyuk EY, Volochnyuk DM, Komarov IV, Tolmachev AA, Mykhailiuk PK. Synthesis of Trifluoromethyl-Substituted 3-Azabicyclo[n.1.0]alkanes: Advanced Building Blocks for Drug Discovery. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402158] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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35
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Periyaraja S, Shanmugam P, Mandal AB. A Copper-Catalyzed One-Pot, Three-Component Diastereoselective Synthesis of 3-Spiroazetidinimine-2-oxindoles and Their Synthetic Transformation into Fluorescent Conjugated Indolones. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301244] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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36
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37
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Vandekerckhove S, D'hooghe M. Exploration of aziridine- and β-lactam-based hybrids as both bioactive substances and synthetic intermediates in medicinal chemistry. Bioorg Med Chem 2013; 21:3643-7. [PMID: 23684232 DOI: 10.1016/j.bmc.2013.04.033] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 04/03/2013] [Indexed: 11/19/2022]
Abstract
The concept of pharmacophore hybridization is attracting an increasing interest from medicinal chemists. Whereas the main motivation for the application of this methodology relates to the pharmacological advantages associated with hybrid molecules, molecular hybridization can also deliver a synthetic advantage through selective chemical modification of the more reactive entity within hybrid systems. Moreover, if both features are combined, new hybrid structures result displaying both a biological and a synthetic benefit, and elaboration of this methodology might culminate in structural diversity and chemical novelty. In this perspective, a new approach based on hybrid structures combining a biologically interesting yet rather chemically reactive nucleus with a privileged heterocyclic scaffold is discussed by means of β-lactam-purine chimeras useful in antiviral research and aziridine-(iso)quinoline hybrids for antimalarial purposes.
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Affiliation(s)
- Stéphanie Vandekerckhove
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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38
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Kenis S, D'hooghe M, Verniest G, Reybroeck M, Dang Thi TA, Pham The C, Thi Pham T, Törnroos KW, Van Tuyen N, De Kimpe N. Nucleophile-Directed Selective Transformation ofcis-1-Tosyl-2-tosyloxymethyl-3-(trifluoromethyl)aziridine into Aziridines, Azetidines, and Benzo-Fused Dithianes, Oxathianes, Dioxanes, and (Thio)morpholines. Chemistry 2013; 19:5966-71. [DOI: 10.1002/chem.201204485] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Indexed: 11/06/2022]
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39
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Reactivity of 1-aminoazetidine-2-carboxylic acid during peptide forming procedures: observation of an unusual variant of the hydrazino turn. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.11.112] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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40
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Fritz SP, West TH, McGarrigle EM, Aggarwal VK. Diastereoselective Synthesis of CF3-Substituted, Epoxide-Fused Heterocycles with β-(Trifluoromethyl)vinylsulfonium Salts. Org Lett 2012; 14:6370-3. [DOI: 10.1021/ol303200n] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Sven P. Fritz
- School of Chemistry, University of Bristol, Cantock’s Close, BS8 1TS Bristol, U.K., and Centre for Synthesis and Chemical Biology, UCD School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Thomas H. West
- School of Chemistry, University of Bristol, Cantock’s Close, BS8 1TS Bristol, U.K., and Centre for Synthesis and Chemical Biology, UCD School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Eoghan M. McGarrigle
- School of Chemistry, University of Bristol, Cantock’s Close, BS8 1TS Bristol, U.K., and Centre for Synthesis and Chemical Biology, UCD School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Varinder K. Aggarwal
- School of Chemistry, University of Bristol, Cantock’s Close, BS8 1TS Bristol, U.K., and Centre for Synthesis and Chemical Biology, UCD School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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Drouillat B, Wright K, David O, Couty F. Insight into the Regioselectivity of Nucleophilic Ring-Opening of Azetidinium Ions Containing Quaternary Carbon Atoms. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200890] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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