1
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Wang S, Wang L, Li F, Bai F. DeepSA: a deep-learning driven predictor of compound synthesis accessibility. J Cheminform 2023; 15:103. [PMID: 37919805 PMCID: PMC10621138 DOI: 10.1186/s13321-023-00771-3] [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: 07/05/2023] [Accepted: 10/20/2023] [Indexed: 11/04/2023] Open
Abstract
With the continuous development of artificial intelligence technology, more and more computational models for generating new molecules are being developed. However, we are often confronted with the question of whether these compounds are easy or difficult to synthesize, which refers to synthetic accessibility of compounds. In this study, a deep learning based computational model called DeepSA, was proposed to predict the synthesis accessibility of compounds, which provides a useful tool to choose molecules. DeepSA is a chemical language model that was developed by training on a dataset of 3,593,053 molecules using various natural language processing (NLP) algorithms, offering advantages over state-of-the-art methods and having a much higher area under the receiver operating characteristic curve (AUROC), i.e., 89.6%, in discriminating those molecules that are difficult to synthesize. This helps users select less expensive molecules for synthesis, reducing the time and cost required for drug discovery and development. Interestingly, a comparison of DeepSA with a Graph Attention-based method shows that using SMILES alone can also efficiently visualize and extract compound's informative features. DeepSA is available online on the below web server ( https://bailab.siais.shanghaitech.edu.cn/services/deepsa/ ) of our group, and the code is available at https://github.com/Shihang-Wang-58/DeepSA .
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Affiliation(s)
- Shihang Wang
- Shanghai Institute for Advanced Immunochemical Studies and School of Life Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai, 201210, China
| | - Lin Wang
- Shanghai Institute for Advanced Immunochemical Studies and School of Life Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai, 201210, China
| | - Fenglei Li
- School of Information Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai, 201210, China
| | - Fang Bai
- Shanghai Institute for Advanced Immunochemical Studies and School of Life Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai, 201210, China.
- School of Information Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai, 201210, China.
- Shanghai Clinical Research and Trial Center, Shanghai, 201210, China.
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2
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Ha HJ. Recent advances in synthesizing and utilizing nitrogen-containing heterocycles. Front Chem 2023; 11:1279418. [PMID: 38025071 PMCID: PMC10646977 DOI: 10.3389/fchem.2023.1279418] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 10/13/2023] [Indexed: 12/01/2023] Open
Abstract
The use of organocatalysts and a pot economy has strengthened recent organic syntheses. Synthetic methodologies may be applicable in laboratory preparation or in the industrial production of valuable organic compounds. In most cases, synthetic challenges are overcome by highly efficient and environmentally benign organocatalysts in a pot-economical manner. This is exemplified by the recent synthesis of tetrahydropyridine-containing (-)-quinine.
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Affiliation(s)
- Hyun-Joon Ha
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Republic of Korea
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3
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Srivastava N, Ha HJ. Regioselective ring opening of aziridine for synthesizing azaheterocycle. Front Chem 2023; 11:1280633. [PMID: 37927563 PMCID: PMC10620703 DOI: 10.3389/fchem.2023.1280633] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 10/02/2023] [Indexed: 11/07/2023] Open
Abstract
Aziridine had different regioselective ring openings depending on the functional group of its alkyl substituent. In the case of the alkyl group bearing γ-ketone at the C2 substituent of aziridine, the ring opening by the hydroxy nucleophile from H2O occurred by attacking the aziridine carbon at the C2 position. This reaction proceeded efficiently in the presence of CF3CO2H. Interestingly, the same starting aziridine ring bearing the alkyl substituent at the C2 position with the γ-silylated hydroxy group instead of γ-ketone led to the ring-opening reaction by the same oxygen nucleophile at the unsubstituted C3 position, with the breakage of the bond between aziridine N1 nitrogen and carbon at C3. These reaction products were cyclized to afford substituted pyrrolidine and piperidine rings with representative examples of congeners of pseudoconhydrine and monomorine.
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Affiliation(s)
| | - Hyun-Joon Ha
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Republic of Korea
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4
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Srivastava N, Ha H. Highly Efficient and Stereoselective Mukaiyama Aldol Reaction with Chiral Aziridine‐2‐carboxaldehyde and Its Synthetic Applications. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nikhil Srivastava
- Department of Chemistry Hankuk University of Foreign Studies 17035 Yongin (Republic of Korea
| | - Hyun‐Joon Ha
- Department of Chemistry Hankuk University of Foreign Studies 17035 Yongin (Republic of Korea
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5
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Rhee H, Ranjith J, Byeon H, Ha H, Yang JW. Preparation and Utilization of Contiguous Bisaziridines as Chiral Building Blocks. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hyong‐Jin Rhee
- Department of Chemistry Hankuk University of Foreign Studies Yongin 17035 Republic of Korea
| | - Jala Ranjith
- Department of Chemistry Hankuk University of Foreign Studies Yongin 17035 Republic of Korea
| | - Huimyoung Byeon
- Department of Energy Science Sungkyunkwan University Suwon 16419 Republic of Korea
| | - Hyun‐Joon Ha
- Department of Chemistry Hankuk University of Foreign Studies Yongin 17035 Republic of Korea
| | - Jung Woon Yang
- Department of Energy Science Sungkyunkwan University Suwon 16419 Republic of Korea
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6
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Srivastava N, Macha L, Ha HJ. Stereoselective synthesis of 2,6-disubstituted piperidine alkaloids. Org Biomol Chem 2020; 18:5493-5512. [PMID: 32478370 DOI: 10.1039/d0ob00918k] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Among the large number of structurally diverse alkaloids, 2,6-disubstituted piperidine and its analogs have often been targeted when exploiting new synthetic techniques perhaps because of their strong pharmacological properties. This review outlines synthetic strategies to build the 2,6-disubstituted piperidine structural motif with a focus on stereochemical control of two substituents at C2 and C6. The key reactions in this process are then classified on the basis of how the piperidine rings were built with specific examples of natural products that control the stereochemical outcomes and their transition states.
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Affiliation(s)
- Nikhil Srivastava
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin 17035, Korea.
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7
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Prandi C, Occhiato EG. From synthetic control to natural products: a focus on N-heterocycles. PEST MANAGEMENT SCIENCE 2019; 75:2385-2402. [PMID: 30624033 DOI: 10.1002/ps.5322] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 01/04/2019] [Accepted: 01/04/2019] [Indexed: 06/09/2023]
Abstract
Natural products containing a N-heterocycle motif are widespread in nature and medicinal plants, in particular, have proved to be a source of almost unlimited N-derived structures with high molecular diversity. Because of their intrinsic potential for use in both biomedical and agricultural applications, there is a general need for new compounds and for the synthesis of 'natural-inspired' analogues. Importantly, transition of a natural product from discovery to a 'market lead' is associated with an increasingly challenging demand for more of the compound, which cannot be met by isolation from natural plant sources, often due to low extraction yields and uneven availability of the plant source itself. Synthesis remains the most reliable approach to provide valuable products for the market. In this review, a comprehensive overview of our contribution to synthetic access to N-derived natural products is given. Major strengths of the proposed methodologies are discussed critically. © 2019 Society of Chemical Industry.
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Affiliation(s)
| | - Ernesto G Occhiato
- Department of Chemistry 'U. Schiff', Università degli Studi di Firenze, Sesto Fiorentino, Italy
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8
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Głowacka IE, Trocha A, Wróblewski AE, Piotrowska DG. N-(1-Phenylethyl)aziridine-2-carboxylate esters in the synthesis of biologically relevant compounds. Beilstein J Org Chem 2019; 15:1722-1757. [PMID: 31435446 PMCID: PMC6664392 DOI: 10.3762/bjoc.15.168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 07/05/2019] [Indexed: 12/13/2022] Open
Abstract
Since Garner’s aldehyde has several drawbacks, first of all is prone to racemization, alternative three-carbon chirons would be of great value in enantioselective syntheses of natural compounds and/or drugs. This review article summarizes applications of N-(1-phenylethyl)aziridine-2-carboxylates, -carbaldehydes and -methanols in syntheses of approved drugs and potential medications as well as of natural products mostly alkaloids but also sphingoids and ceramides and their 1- and 3-deoxy analogues and several hydroxy amino acids and their precursors. Designed strategies provided new procedures to several drugs and alternative approaches to natural products and proved efficiency of a 2-substituted N-(1-phenylethyl)aziridine framework as chiron bearing a chiral auxiliary.
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Affiliation(s)
- Iwona E Głowacka
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland
| | - Aleksandra Trocha
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland
| | - Andrzej E Wróblewski
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland
| | - Dorota G Piotrowska
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszynskiego 1, 90-151 Lodz, Poland
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9
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Yadav NN, Lee YG, Srivastava N, Ha HJ. Alkylative Ring-Opening of Bicyclic Aziridinium Ion and Its Application for Alkaloid Synthesis. Front Chem 2019; 7:460. [PMID: 31316970 PMCID: PMC6610304 DOI: 10.3389/fchem.2019.00460] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 06/11/2019] [Indexed: 11/13/2022] Open
Abstract
Alkylative ring-opening of bicyclic aziridinium ion generated from 4-hydroxybutylaziridine with organocopper reagent was achieved successfully to afford 2-alkylsubstituted piperidine in high or moderate yield. This method allowed carbon-carbon bond formation of "non-activated" aziridine via aziridinium ion ring-opening in regio- and stereo-selective manner for the first time. This newly developed reaction was applied for an efficient synthesis of alkaloid with the representative example of conine and epiquinamide.
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Affiliation(s)
- Nagendra Nath Yadav
- Department of Chemistry, North Eastern Regional Institute of Science and Technology, Nirjuli, India
| | - Young-Gun Lee
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, South Korea
| | - Nikhil Srivastava
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, South Korea
| | - Hyun-Joon Ha
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, South Korea
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10
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Kameda R, Sohma T, Kobayashi K, Uchiyama R, Nosaka K, Konno H, Akaji K, Hattori Y. Convergent Synthesis of trans-2,6-Disubstituted Piperidine Alkaloid, (-)-iso-6-Spectaline by Palladium-Catalyzed Cyclization. Chem Pharm Bull (Tokyo) 2019; 67:253-257. [PMID: 30828001 DOI: 10.1248/cpb.c18-00817] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The plant alkaloids, iso-6-spectaline and spectaline, isolated from the Cassia or Senna genera contain a characteristic 2,6-disubstituted piperidin-3-ol scaffold. Although both natural products are reported to exhibit a variety of interesting biological activities, few stereo-selective schemes for the construction of the 2,6-disubstituted scaffold have been reported. Following our previous studies regarding the synthesis of (+)-spectaline, herein we report the first convergent synthesis of (-)-iso-6-spectaline using a cross-metathesis under thermal conditions where the cis-2,6-disubstituted piperidin-3-ol scaffold is condensed with a long alkyl chain containing a terminal olefin. The cis-2,6-disubstituted piperidin-3-ol used in the synthesis was prepared simply via Pd(II)-catalyzed diastereoselective cyclization. It was confirmed that (+)-spectaline, an epimer of (-)-iso-6-spectaline, was selectively synthesized by the cross-metathesis reaction under less intense thermal conditions starting from the same cis-2,6-disubstituted piperidin-3-ol derivative.
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Affiliation(s)
- Risako Kameda
- Department of Medicinal Chemistry, Kyoto Pharmaceutical University
| | - Takuto Sohma
- Department of Medicinal Chemistry, Kyoto Pharmaceutical University
| | - Kazuya Kobayashi
- Department of Medicinal Chemistry, Kyoto Pharmaceutical University
| | - Ryosuke Uchiyama
- 2nd Department of Biochemistry, Faculty of Pharmaceutical Sciences, Mukogawa Women's University
| | - Kazuto Nosaka
- 2nd Department of Biochemistry, Faculty of Pharmaceutical Sciences, Mukogawa Women's University
| | - Hiroyuki Konno
- Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University
| | - Kenichi Akaji
- Department of Medicinal Chemistry, Kyoto Pharmaceutical University
| | - Yasunao Hattori
- Center for Instrumental Analysis, Kyoto Pharmaceutical University
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11
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Macha L, Ha HJ. Total Synthesis and Absolute Stereochemical Assignment of Microgrewiapine A and Its Stereoisomers. J Org Chem 2019; 84:94-103. [PMID: 30406652 DOI: 10.1021/acs.joc.8b02342] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Total synthesis of both enantiomers of (-)-(2 S,3 R,6 S)- and (+)-(2 R,3 S,6 R)-microgrewiapine A along with (+)-microcosamine A and (-)-6- epi-microgrewiapine A from chiral 1-(α-methylbenzyl)-aziridine-2-carboxylate was accomplished for the first time. Key steps involved in this synthesis include one-pot reductive ring-opening of aziridine, debenzylation, intramolecular N-alkylation to obtain the key piperidine ring, and Julia-Kociensky olefination. The absolute configuration of natural microgrewiapine A is assigned as (+)-(2 R,3 S,6 R), which is opposite to the originally proposed structure by comparing optical rotation data of both synthetic enantiomers.
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Affiliation(s)
- Lingamurthy Macha
- Department of Chemistry , Hankuk University of Foreign Studies , Yongin 17035 , Korea
| | - Hyun-Joon Ha
- Department of Chemistry , Hankuk University of Foreign Studies , Yongin 17035 , Korea
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12
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Yoshida M, Hirokane T, Kawakami A, Matsumoto K. Diastereoselective Synthesis of 5-Iodoalkenyl-2-oxazolines by Electrophilic Cyclization of Allenyl Amides. HETEROCYCLES 2019. [DOI: 10.3987/com-18-s(f)19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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13
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Yadav NN, Ha HJ. Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles. J Vis Exp 2018. [PMID: 30199042 DOI: 10.3791/57572] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Bicyclic aziridinium ions were generated by the removal of an appropriate leaving group through internal nucleophilic attack by nitrogen atom in the aziridine ring. The utility of bicyclic aziridinium ions, specifically 1-azoniabicyclo[3.1.0]hexane and 1-azoniabicyclo[4.1.0]heptane tosylate highlighted in the aziridine ring openings by the nucleophile with the release of the ring strain to yield the corresponding ring-expanded azaheterocycles such as pyrrolidine, piperidine and azepane with diverse substituents on the ring in regio- and stereospecific manner. Herein, we report a simple and convenient method for the preparation of the stable 1-azabicyclo[4.1.0]heptane tosylate followed by selective ring opening via a nucleophilic attack either at the bridge or at the bridgehead carbon to yield piperidine and azepane rings, respectively. This synthetic strategy allowed us to prepare biologically active natural products containing piperidine and azepane motif including sedamine, allosedamine, fagomine and balanol in highly efficient manner.
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Affiliation(s)
- Nagendra Nath Yadav
- Department of Chemistry, North Eastern Regional Institute of Science and Technology
| | - Hyun-Joon Ha
- Department of Chemistry, Hankuk University of Foreign Studies;
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14
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Akhtar R, Naqvi SAR, Zahoor AF, Saleem S. Nucleophilic ring opening reactions of aziridines. Mol Divers 2018; 22:447-501. [PMID: 29728870 DOI: 10.1007/s11030-018-9829-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 04/23/2018] [Indexed: 12/29/2022]
Abstract
Aziridine ring opening reactions have gained tremendous importance in the synthesis of nitrogen containing biologically active molecules. During recent years, a great effort has been put forward by scientists toward unique bond construction methodologies via ring opening of aziridines. In this regard, a wide range of chiral metal- and organo-catalyzed desymmetrization reactions of aziridines have been reported with carbon, sulfur, oxygen, nitrogen, halogen, and other nucleophiles. In this review, an outline of methodologies adopted by a number of scientists during 2013-2017 for aziridine ring opening reactions as well as their synthetic applications is described.
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Affiliation(s)
- Rabia Akhtar
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
| | - Syed Ali Raza Naqvi
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
| | - Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan.
| | - Sameera Saleem
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
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15
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Choi J, Yadav NN, Ha HJ. Preparation of a Stable Bicyclic Aziridinium Ion and Its Ring Expansion toward Piperidines and Azepanes. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700080] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jieun Choi
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin 17035 Korea
| | - Nagendra Nath Yadav
- Department of Chemistry; North Eastern Regional Institute of Science and Technology, Nirjuli; Arunachal Pradesh 791109 India
| | - Hyun-Joon Ha
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin 17035 Korea
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16
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Kandepedu N, Abrunhosa-Thomas I, Troin Y. Stereoselective strategies for the construction of polysubstituted piperidinic compounds and their applications in natural products’ synthesis. Org Chem Front 2017. [DOI: 10.1039/c7qo00262a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An abridged and far-reaching review communication on the construction of the polysubstituted piperidinic core using diverse methodologies for the benefit of organic chemists interested in the total synthesis of biologically active compounds.
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Affiliation(s)
- Nishanth Kandepedu
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - Isabelle Abrunhosa-Thomas
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - Yves Troin
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
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