1
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Ghosh S, Das D, Mandal RD, Das AR. Pragmatic Access to Hybrid Quinoxaline Scaffold Mediated by Elemental Sulfur Enabling Actualization to π-Extended and Aza-Annulated Heterocyclic Units. J Org Chem 2024. [PMID: 39333838 DOI: 10.1021/acs.joc.4c01972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2024]
Abstract
A metal-free approach for synthesizing hybrid quinoxaline derivatives from sulfoxonium ylide and a 1,5-bis-nucleophilic N-heterocycle mediated by elemental sulfur is presented to illuminate the [5+1] cascade cyclization sequence. Large-scale synthesis and postsynthetic functionalizations for the annulative π-extension and intramolecular aza-annulation reactions reveal the potential utility and actualize the fabricated approach.
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Affiliation(s)
- Swarnali Ghosh
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Dwaipayan Das
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Rahul Dev Mandal
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Asish R Das
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
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2
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Goyal P, Dubey AK, Chowdhury R, Wadawale A. Primary amine-catalyzed enantioselective 1,4-Michael addition reaction of pyrazolin-5-ones to α,β-unsaturated ketones. Beilstein J Org Chem 2024; 20:1518-1526. [PMID: 39015621 PMCID: PMC11250233 DOI: 10.3762/bjoc.20.136] [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: 04/09/2024] [Accepted: 06/24/2024] [Indexed: 07/18/2024] Open
Abstract
The enantioselective 1,4-addition reaction of pyrazolin-5-ones to α,β-unsaturated ketones catalyzed by a cinchona alkaloid-derived primary amine-Brønsted acid composite is reported. Both enantiomers of the anticipated pyrazole derivatives were obtained in good to excellent yields (up to 97%) and high enantioselectivities (up to 98.5% ee) under mild reaction conditions. In addition, this protocol was further expanded to synthesize highly enantioenriched hybrid molecules bearing biologically relevant heterocycles.
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Affiliation(s)
- Pooja Goyal
- Bio-Organic Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Akhil K Dubey
- Bio-Organic Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Raghunath Chowdhury
- Bio-Organic Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Amey Wadawale
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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3
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Salin AV, Shabanov AA, Khayarov KR, Islamov DR, Voloshina AD, Amerhanova SK, Lyubina AP. Phosphine-Catalyzed Synthesis and Cytotoxic Evaluation of Michael Adducts of the Sesquiterpene Lactone Arglabin. ChemMedChem 2024; 19:e202400045. [PMID: 38516805 DOI: 10.1002/cmdc.202400045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 02/15/2024] [Accepted: 03/21/2024] [Indexed: 03/23/2024]
Abstract
A general method for chemo- and diastereoselective modification of anticancer natural product arglabin with nitrogen- and carbon-centered pronucleophiles under the influence of nucleophilic phosphine catalysts was developed. The locked s-cis-geometry of α-methylene-γ-butyrolactone moiety of arglabin favors for the additional stabilization of the zwitterionic intermediate by electrostatic interaction between phosphonium and enolate oxygen centers, leading to the unprecedentedly high efficiency of the phosphine-catalyzed Michael additions to this sesquiterpene lactone. Using n-Bu3P as the catalyst, pyrazole, phthalimide, 2-oxazolidinone, 4-quinazolinone, uracil, thymine, cytosine, and adenine adducts of arglabin were obtained. The n-Bu3P-catalyzed reaction of arglabin with active methylene compounds resulted in the predominant formation of bisadducts bearing a new quaternary carbon center. All synthesized Michael adducts and previously obtained phosphorylated arglabin derivatives were evaluated in vitro against eleven cancer and two normal cell lines, and the results were compared to those of natural arglabin and its dimethylamino hydrochloride salt currently used as anticancer drugs. 2-Oxazolidinone, uracil, diethyl malonate, dibenzyl phosphonate, and diethyl cyanomethylphosphonate derivatives of arglabin exhibited more potent antiproliferative activity towards several cancer cell lines and lower cytotoxicity towards normal cell lines in comparison to the reference compounds, indicating the feasibility of the developed methodology for the design of novel anticancer drugs with better therapeutic potential.
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Affiliation(s)
- Alexey V Salin
- A.M. Butlerov Institute of Chemistry, Kazan Federal University, Kremlevskaya Street, 18, Kazan, 420008, Russian Federation
| | - Andrey A Shabanov
- A.M. Butlerov Institute of Chemistry, Kazan Federal University, Kremlevskaya Street, 18, Kazan, 420008, Russian Federation
| | - Khasan R Khayarov
- A.M. Butlerov Institute of Chemistry, Kazan Federal University, Kremlevskaya Street, 18, Kazan, 420008, Russian Federation
| | - Daut R Islamov
- Laboratory for structural analysis of biomacromolecules, Kazan Scientific Center of Russian Academy of Science, Kremlevskaya Street, 31, Kazan, 420008, Russian Federation
| | - Alexandra D Voloshina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of Russian Academy of Sciences, Arbuzov Street, 8, Kazan, 420088, Russian Federation
| | - Syumbelya K Amerhanova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of Russian Academy of Sciences, Arbuzov Street, 8, Kazan, 420088, Russian Federation
| | - Anna P Lyubina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of Russian Academy of Sciences, Arbuzov Street, 8, Kazan, 420088, Russian Federation
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4
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Liu Y, Huang J, Sun Z, Deng Y, Qian Y, Huang Q, Cao S. Two-step synthesis of vicinal trifluoromethyl primary amines from α-(trifluoromethyl)styrenes and phthalimide. Org Biomol Chem 2024; 22:4641-4646. [PMID: 38775720 DOI: 10.1039/d4ob00567h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
A novel two-step synthesis of β-trifluoromethyl primary amines from readily available α-(trifluoromethyl)styrenes and phthalimide is developed. The first step involves a hydroamination between α-(trifluoromethyl)styrenes and phthalimide (PhthNH) with the assistance of a base. Next, the hydrazinolysis of the resulting N-(β-trifluoromethyl-β-arylethyl)phthalimides with hydrazine hydrate affords the desired N-(β-trifluoromethyl-β-arylethyl)amines.
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Affiliation(s)
- Ying Liu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China.
| | - Jiaqi Huang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China.
| | - Zhudi Sun
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China.
| | - Yupian Deng
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China.
| | - Yuhao Qian
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China.
| | - Qingchun Huang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China.
| | - Song Cao
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China.
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
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5
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Lei X, Sun Y, Guo Q, Shi J. Base mediated aza-[2 + 1] annulation and regioselective aziridine ring-opening cascade: mild synthesis of functionalized β-amino ketones from cyclic N-sulfonyl aldimines and α-carbonyl sulfonium salts. RSC Adv 2024; 14:17178-17183. [PMID: 38808243 PMCID: PMC11131043 DOI: 10.1039/d4ra02817a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 05/20/2024] [Indexed: 05/30/2024] Open
Abstract
Cyclic N-sulfonyl aldimines are well-known aza-[2C]-synthons for various [2 + n] annulation reactions. Herein we describe a novel base mediated [2 + 1] annulation and a regioselective aziridine ring-opening reaction cascade, which provides an efficient and distinct synthetic strategy from readily available cyclic N-sulfonyl aldimines and α-carbonyl sulfonium salts leading to β-amino ketone derivatives through the corresponding fused tri-substituted aziridines. This one-pot, two-step process involves formation of C-C and C-N bonds and subsequent cleavage of a C-N bond. The features of the developed reaction include the use of mild reaction conditions, broad substrate scope, and excellent yields. The synthetic utility of this approach was demonstrated by gram-scale operation and further product derivatizations.
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Affiliation(s)
- Xiaoqiang Lei
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100050 China
| | - Yanyan Sun
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100050 China
| | - Qinglan Guo
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100050 China
| | - Jiangong Shi
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100050 China
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6
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Maksó L, Szele B, Ispán D, Gömöry Á, Mahó S, Skoda-Földes R. Catalyst- and excess reagent recycling in aza-Michael additions. Org Biomol Chem 2024; 22:2465-2473. [PMID: 38436400 DOI: 10.1039/d3ob02073h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
16α-Azolyl-pregnenolone derivatives were prepared via 2-butyl-1,1,3,3-tetramethylguanidine (n-Bu-TMG) catalysed aza-Michael addition of 16-dehydropregnenolone (16-DHP) carried out in [bmim][BF4]. The application of the guanidine base and the imidazolium ionic liquid made it possible to recycle not only the catalyst/solvent mixture but also the excess of the N-heterocyclic reagent. By the introduction of CO2 at the end of the reaction, both the guanidine base and the unreacted (excess) reagent could be converted into ionic species that remained dissolved in the ionic liquid phase, while the steroid components were extracted with an apolar solvent. After the removal of CO2, the experiment could be repeated by the addition of the steroid substrate and only an equimolar amount of the N-heterocycle. The methodology was successfully applied to a number of N-heterocycles, such as imidazole, pyrazole, 1,2,3- and 1,2,4-triazoles, and benzimidazole. Indazole and indole could also be converted into the corresponding products, but a stronger base had to be used to obtain a recyclable system.
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Affiliation(s)
- Lilla Maksó
- University of Pannonia, Department of Organic Chemistry, Egyetem u. 10, P.O. Box 158, H-8200 Veszprém, Hungary.
| | - Boglárka Szele
- University of Pannonia, Department of Organic Chemistry, Egyetem u. 10, P.O. Box 158, H-8200 Veszprém, Hungary.
| | - Dávid Ispán
- University of Pannonia, Department of Organic Chemistry, Egyetem u. 10, P.O. Box 158, H-8200 Veszprém, Hungary.
| | - Ágnes Gömöry
- Hungarian Research Network, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Sándor Mahó
- Chemical Works of Gedeon Richter Plc., 1103 Budapest, Gyömrői út 19-21, Hungary
| | - Rita Skoda-Földes
- University of Pannonia, Department of Organic Chemistry, Egyetem u. 10, P.O. Box 158, H-8200 Veszprém, Hungary.
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7
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Zhelavskyi O, Parikh S, Jhang YJ, Staples RJ, Zimmerman PM, Nagorny P. Green Light Promoted Iridium(III)/Copper(I)-Catalyzed Addition of Alkynes to Aziridinoquinoxalines Through the Intermediacy of Azomethine Ylides. Angew Chem Int Ed Engl 2024; 63:e202318876. [PMID: 38267370 PMCID: PMC10939844 DOI: 10.1002/anie.202318876] [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: 12/08/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 01/26/2024]
Abstract
This manuscript describes the development of alkyne addition to the aziridine moiety of aziridinoquinoxalines using dual Ir(III)/Cu(I) catalytic system under green light-emitting diode (LED) photolysis (λmax =525 nm). This mild method features high levels of chemo- and regioselectivity and was used to generate 30 highly functionalized substituted dihydroquinoxalines in 36-98 % yield. This transformation was also carried asymmetrically using phthalazinamine-based chiral ligand to provide 9 chiral addition products in 96 : 4 to 86 : 14 e.r. The experimental and quantum chemical explorations of this reaction suggest a mechanism that involves Ir(III)-catalyzed triplet energy transfer followed by a ring-opening reaction ultimately leading to the formation of azomethine ylide intermediates. These azomethine intermediates undergo sequential protonation/copper(I) acetylide addition to provide the products.
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Affiliation(s)
| | - Seren Parikh
- Chemistry Department, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yin-Jia Jhang
- Chemistry Department, University of Michigan, Ann Arbor, MI 48109, USA
| | - Richard J Staples
- Department of Chemistry and Chemical Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Paul M Zimmerman
- Chemistry Department, University of Michigan, Ann Arbor, MI 48109, USA
| | - Pavel Nagorny
- Chemistry Department, University of Michigan, Ann Arbor, MI 48109, USA
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8
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Barron B, Edge C, Fenner S, Shrives H, Sollis S, Whiting M, Valette D. A Concise Enantioselective Synthesis of Fluorinated Pyrazolo-Piperidine GSK3901383A Enabled by an Organocatalytic Aza-Michael Addition. Org Lett 2024; 26:1533-1538. [PMID: 38363757 DOI: 10.1021/acs.orglett.3c03694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
A highly enantioselective organocatalytic aza-Michael addition of 4-nitro-pyrazole to ethyl (E)-2,2-difluoro-5-oxopent-3-enoate has been developed. This reaction enabled a concise, four-step, stereoselective synthesis of highly functionalized 3,3-difluoro-4-pyrazolo-piperidine GSK3901383A, a key intermediate for the synthesis of a leucine-rich repeat kinase 2 inhibitor API. Computational analysis provided insight into the steric requirements of the catalytic system, enabling rational selection of a highly selective catalyst.
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Affiliation(s)
- Benedict Barron
- Drug Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Colin Edge
- Computational Chemistry, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Sabine Fenner
- Drug Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Harry Shrives
- Medicinal Chemistry, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Steven Sollis
- Medicinal Chemistry, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Matthew Whiting
- Drug Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Damien Valette
- Drug Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
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9
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Qi SS, Sun XP, Sun YB, Zhai JJ, Wang YF, Chu MM, Xu DQ. Synthesis of Chiral Diarylmethylamides via Catalytic Asymmetric Aza-Michael Addition of Amides to ortho-Quinomethanes. J Org Chem 2024. [PMID: 38181049 DOI: 10.1021/acs.joc.3c01976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2024]
Abstract
Chiral diarylmethylamides are a privileged skeleton in many bioactive molecules. However, the enantioselective synthesis of such molecules remains a long-standing challenge in organic synthesis. Herein, we report a chiral bifunctional squaramide catalyzed asymmetric aza-Michael addition of amides to in situ generated ortho-quinomethanes, affording enantioenriched diarylmethylamides in good yields with excellent enantioselectivities. This work not only provides a new strategy for the construction of the diarylmethylamides but also represents the practicability of amides as nitrogen-nucleophiles in asymmetric organocatalysis.
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Affiliation(s)
- Suo-Suo Qi
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Xiao-Ping Sun
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Yan-Biao Sun
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Jing-Jing Zhai
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Yi-Feng Wang
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Ming-Ming Chu
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, P. R. China
| | - Dan-Qian Xu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China
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10
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Rizzo C, Pace A, Pibiri I, Buscemi S, Palumbo Piccionello A. From Conventional to Sustainable Catalytic Approaches for Heterocycles Synthesis. CHEMSUSCHEM 2023:e202301604. [PMID: 38140917 DOI: 10.1002/cssc.202301604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/19/2023] [Accepted: 12/22/2023] [Indexed: 12/24/2023]
Abstract
Synthesis of heterocyclic compounds is fundamental for all the research area in chemistry, from drug synthesis to material science. In this framework, catalysed synthetic methods are of great interest to effective reach such important building blocks. In this review, we will report on some selected examples from the last five years, of the major improvement in the field, focusing on the most important conventional catalytic systems, such as transition metals, organocatalysts, to more sustainable ones such as photocatalysts, iodine-catalysed reaction, electrochemical reactions and green innovative methods.
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Affiliation(s)
- Carla Rizzo
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Italy, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo
| | - Andrea Pace
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Italy, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo
| | - Ivana Pibiri
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Italy, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo
| | - Silvestre Buscemi
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Italy, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo
| | - Antonio Palumbo Piccionello
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Italy, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo
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11
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Wang YJ, Zhao LM. Synthesis of 10-Membered Azecines through Pd-Catalyzed Formal [6+4] Cycloaddition and Their Transannular Reaction to Polycyclic Compounds. Chemistry 2023; 29:e202302111. [PMID: 37776147 DOI: 10.1002/chem.202302111] [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] [Revised: 09/17/2023] [Accepted: 09/25/2023] [Indexed: 10/01/2023]
Abstract
Azecine fragments are frequently presented in natural products and bioactive compounds. However, minor efforts have been devoted to these 10-membered N-heterocycles, and their synthesis is still challenging. Reported herein is the first catalytic formal [6+4] cycloaddition for the synthesis of 10-membered azecines. Under palladium catalysis, the reaction of δ-vinylvalerolactones and benzofuran-derived azadienes proceeds smoothly to afford benzofuran-fused azecines with high diastereoselectivity in moderate to good yields. A unique transannular reaction of these 10-membered azecines for the construction of polycyclic compounds is also demonstrated.
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Affiliation(s)
- Yu-Jiao Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, China
| | - Li-Ming Zhao
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, China
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12
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Jhang YJ, Zhelavskyi O, Nagorny P. Enantioselective Parallel Kinetic Resolution of Aziridine-Containing Quinoxalines via Chiral Phosphoric Acid-Catalyzed Transfer Hydrogenation. Org Lett 2023; 25:7721-7726. [PMID: 37853540 DOI: 10.1021/acs.orglett.3c03072] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
This article describes the asymmetric synthesis of chiral aziridinoquinoxalines using (R)-TRIP-catalyzed parallel kinetic resolution under transfer hydrogenation conditions. This resolution was successfully accomplished for 16 different substrates and led to highly enantioenriched diastereomers with the (R)-configuration of the newly formed stereocenter (32-61% yield and 64-99% ee for the (R,R,R)-diastereomers and 7-46% yield and 97-99% ee for the (S,S,R)-diastereomers). This process could be coupled to ring-opening of the (S,S,R)-diastereomer with thiophenol to produce chiral tetrahydroquinoxalines with three contiguous stereocenters.
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Affiliation(s)
- Yin-Jia Jhang
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Oleksii Zhelavskyi
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Pavel Nagorny
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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13
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Dyguda M, Przydacz A, Albrecht Ł. Dearomative, aminocatalytic formal normal-electron-demand aza-Diels-Alder cycloaddition in the synthesis of tetrahydrofuropyridines. Chem Commun (Camb) 2023; 59:12903-12906. [PMID: 37819685 DOI: 10.1039/d3cc03946c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
In the manuscript the application of dearomative formal normal-electron-demand aza-Diels-Alder cycloaddition in the synthesis of tetrahydrofuropyridines is described. The developed approach utilizes aminocatalytic activation of 2-alkyl-3-furfurals that proceeds via formation of the dearomatized dienamine intermediate. Initially obtained cycloadducts have been subjected to subsequent transformations providing access to tetrahydrofuropyridines or functionalized cinnamates. The mechanism of the process has been confirmed by DFT calculations.
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Affiliation(s)
- Mateusz Dyguda
- Faculty of Chemistry, Institute of Organic Chemistry Lodz University of Technology Żeromskiego 114, 90-543 Lodz, Poland.
| | - Artur Przydacz
- Faculty of Chemistry, Institute of Organic Chemistry Lodz University of Technology Żeromskiego 114, 90-543 Lodz, Poland.
| | - Łukasz Albrecht
- Faculty of Chemistry, Institute of Organic Chemistry Lodz University of Technology Żeromskiego 114, 90-543 Lodz, Poland.
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14
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Salin AV, Shabanov AA, Khayarov KR, Nugmanov RI, Islamov DR. Stereoelectronic Effect in the Reaction of α-Methylene Lactones with Tertiary Phosphines and Its Application in Organocatalysis. J Org Chem 2023; 88:11954-11967. [PMID: 37540578 DOI: 10.1021/acs.joc.3c01223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2023]
Abstract
The kinetic data indicate that the addition of tertiary phosphines to α-methylene lactones in acetic acid is strongly accelerated in comparison to the reactions of related open-chain esters. Six-membered α-methylene-δ-valerolactone exhibited a more pronounced rate increase than five-membered α-methylene-γ-butyrolactone. The use of α-methylene-γ-butyrolactam as a nitrogen analogue of α-methylene-γ-butyrolactone resulted in a total loss of the reaction acceleration. The observed reactivities were rationalized by DFT calculations at the RwB97XD/6-31+G(d,p) level of theory, showing that the intramolecular interaction between phosphonium and enolate oxygen centers provided by the locked s-cis-geometry of the heterocycles plays an important role in the stabilization of intermediate zwitterions. The reactivity is also controlled by the conformational flexibility of the heterocycle. The geometries of five-membered and, especially, six-membered lactone cycles are slightly changed upon the nucleophilic attack of phosphine, leading to the stabilizing stereoelectronic effect by the Ρ···Ο interaction. The addition of phosphine to α-methylene-γ-butyrolactam significantly distorts the initial geometry of the heterocycle, making the nucleophilic attack unfavorable. The application of the stereoelectronic effect to enhance the efficiency of the phosphine-catalyzed Michael and Pudovik reactions of α-methylene lactones was demonstrated.
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Affiliation(s)
- Alexey V Salin
- A.M. Butlerov Institute of Chemistry,Kazan Federal University, Kremlevskaya Street 18, Kazan 420008, Russian Federation
| | - Andrey A Shabanov
- A.M. Butlerov Institute of Chemistry,Kazan Federal University, Kremlevskaya Street 18, Kazan 420008, Russian Federation
| | - Khasan R Khayarov
- A.M. Butlerov Institute of Chemistry,Kazan Federal University, Kremlevskaya Street 18, Kazan 420008, Russian Federation
| | - Ramil I Nugmanov
- Janssen Research & Development, Janssen Pharmaceutica N.V., Turnhoutseweg 30, Beerse B-2340, Belgium
| | - Daut R Islamov
- Laboratory for Structural Analysis of Biomacromolecules, Kazan Scientific Center of Russian Academy of Science, Kremlevskaya Street 31, Kazan 420008, Russian Federation
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15
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Yang Z, Bao Y, Huang J, Han Z, Sun J, Huang H. Tandem Allylic Amination/oxa-Michael Addition of Vinyl Methylene Cyclic Carbonates via Palladium-Organo Relay Catalysis. Org Lett 2023. [PMID: 37486245 DOI: 10.1021/acs.orglett.3c02014] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
A tandem allylic amination/oxa-Michael addition of vinyl methylene cyclic carbonates (VMCCs) has been developed to construct heterocycles by single palladium catalysis or palladium-organo relay catalysis. In this process, the bisnucleophiles first underwent regioselective allylic amination, and then the second nucleophilic group further completed the hetero-Michael addition reaction to form a series of heterocycles. Among them, the chiral 3,4-dihydro-2H-benzo[b][1,4]oxazines could be produced in medium to high yield with good enantioselectivity under a palladium-organo relay catalysis.
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Affiliation(s)
- Zhenkun Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Yu Bao
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jiaxin Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Zhengyu Han
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
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16
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Kolankowski K, Rżewska J, Ruśkowski P, Gadomska-Gajadhur A. Optimization of the Poly(glycerol citraconate) Synthesis Using the Box-Behnken Design. ACS OMEGA 2023; 8:20352-20359. [PMID: 37323387 PMCID: PMC10268020 DOI: 10.1021/acsomega.3c00166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 05/12/2023] [Indexed: 06/17/2023]
Abstract
This work aimed to obtain poly(glycerol citraconate) (PGCitrn) for biomedical applications, analyze the obtained polyester by spectroscopic methods, and optimize its preparation. Polycondensation reactions of glycerol and citraconic anhydride were carried out. It was provided that the results in the reaction are oligomers of poly(glycerol citraconate). Optimization studies were carried out based on the Box-Behnken design. The input variables in this plan were the ratio of functional groups, temperature, and time and occurrence in coded form: -1, 0, or 1. Three output variables were optimized: the degree of esterification, the percentage of Z-mers, and the degree of carboxyl group conversion; they were determined by titration and spectroscopic methods. The optimization criterion was to maximize the values of output variables. A mathematical model and an equation describing it were determined for each output variable. The models predicted the experimental results well. An experiment was conducted under determined optimal conditions. The experimental results were very close to the calculated values. Poly(glycerol citraconate) oligomers with an esterification degree of 55.2%, a Z-mer content of 79.0%, and a degree of rearrangement of carboxyl groups of 88.6% were obtained. The obtained PGCitrn can serve as a component of an injectable implant. The obtained material can be used to produce nonwoven fabrics (with the addition of PLLA, for example), which can be subjected to a cytotoxicity test which can then serve as a dressing material.
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17
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Brześkiewicz J, Loska R. Synthesis of Isoindole N-Oxides by Palladium-Catalyzed C-H Functionalization of Aldonitrones. J Org Chem 2023; 88:2385-2392. [PMID: 36704962 DOI: 10.1021/acs.joc.2c02797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A palladium-catalyzed strategy for isoindole N-oxide ring construction by C-H functionalization of aldonitrones is described. Our protocol is of general character, providing isoindole N-oxides with a variety of functional groups, including very sterically congested products. Further transformations into spirocyclic isoindolines, isoindoles, or a polycyclic isoquinolinium salt have been demonstrated as well. A mechanistic study suggests that the catalytic process proceeds via a Heck-type addition to the double C═N bond.
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Affiliation(s)
- Jakub Brześkiewicz
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
| | - Rafał Loska
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
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18
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Anand A, Kumar R, Maity J, Maikhuri VK. Recent progress in the Cu-catalyzed multicomponent synthesis of 1,4-disubstituted 1,2,3-triazoles. SYNTHETIC COMMUN 2023. [DOI: 10.1080/00397911.2023.2174031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Akash Anand
- Department of Chemistry, Patna University, Patna, India;
| | - Rajneesh Kumar
- Department of Chemistry, Patna University, Patna, India;
| | - Jyotirmoy Maity
- Department of Chemistry, St. Stephen’s College, University of Delhi, Delhi, India
| | - Vipin K. Maikhuri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
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19
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Ag2CO3 catalyzed aza-michael addition of pyrazoles to α, β-unsaturated carbonyl compounds: A new access to N-alkylated pyrazole derivatives. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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20
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Lopat’eva ER, Krylov IB, Lapshin DA, Terent’ev AO. Redox-active molecules as organocatalysts for selective oxidative transformations - an unperceived organocatalysis field. Beilstein J Org Chem 2022; 18:1672-1695. [PMID: 36570566 PMCID: PMC9749543 DOI: 10.3762/bjoc.18.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 11/23/2022] [Indexed: 12/13/2022] Open
Abstract
Organocatalysis is widely recognized as a key synthetic methodology in organic chemistry. It allows chemists to avoid the use of precious and (or) toxic metals by taking advantage of the catalytic activity of small and synthetically available molecules. Today, the term organocatalysis is mainly associated with redox-neutral asymmetric catalysis of C-C bond-forming processes, such as aldol reactions, Michael reactions, cycloaddition reactions, etc. Organophotoredox catalysis has emerged recently as another important catalysis type which has gained much attention and has been quite well-reviewed. At the same time, there are a significant number of other processes, especially oxidative, catalyzed by redox-active organic molecules in the ground state (without light excitation). Unfortunately, many of such processes are not associated in the literature with the organocatalysis field and thus many achievements are not fully consolidated and systematized. The present article is aimed at overviewing the current state-of-art and perspectives of oxidative organocatalysis by redox-active molecules with the emphasis on challenging chemo-, regio- and stereoselective CH-functionalization processes. The catalytic systems based on N-oxyl radicals, amines, thiols, oxaziridines, ketone/peroxide, quinones, and iodine(I/III) compounds are the most developed catalyst types which are covered here.
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Affiliation(s)
- Elena R Lopat’eva
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Igor B Krylov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Dmitry A Lapshin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Alexander O Terent’ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
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21
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Kaur P, Sharma P, Kumar V, Sahal D, Kumar R. Chitosan-supported FeCl3 catalyzed multicomponent synthesis of tetrahydroisoquinoline-indole hybrids with promising activity against chloroquine resistant Plasmodium falciparum. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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22
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Zhang H, He J, Xu W, Yang L, Zhang X, Wang H, Lang M, Wang J, Peng S. Unexpected Copper-Catalyzed Cascade Reaction of 1,6-Enynes with Sulfoxonium Ylides. Org Lett 2022; 24:7095-7100. [PMID: 36154184 DOI: 10.1021/acs.orglett.2c02620] [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
An unprecedented copper-catalyzed cascade reaction of 1,6-enynes with sulfoxonium ylides is reported, providing a series of structurally intriguing 2,3-disubstituted indolines bearing a conjugated dienone functionality at the 3-position in moderate to excellent yields with good chemo-, regio-, and diastereoselectivities under mild reaction conditions. Importantly, sulfoxonium-ylide-derived copper-carbene herein exhibits quite different reactivity from that of diazo copper-carbene. A rational mechanism, an initial ammonium ylide rather than allene formation, is proposed.
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Affiliation(s)
- Hong Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Jieyin He
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Wendi Xu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Liangliang Yang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Xue Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Haiyang Wang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Ming Lang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
| | - Jian Wang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China.,School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, P. R. China
| | - Shiyong Peng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
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23
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Green Catalysts in the Synthesis of Biopolymers and Biomaterials. ChemistrySelect 2022. [DOI: 10.1002/slct.202201276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Li TH, Niu C, Du DM. Enantioselective synthesis of isoxazole-containing spirooxindole tetrahydroquinolines via squaramide-catalysed cascade reactions. Org Biomol Chem 2022; 20:5582-5588. [PMID: 35796306 DOI: 10.1039/d2ob00864e] [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
A class of o-sulfonylaminostyryl isoxazole synthons were designed and demonstrated to be useful building blocks in asymmetric cascade aza-Michael/Michael reaction with 3-olefinic oxindoles. This squaramide-catalysed cascade reaction afforded structurally complex isoxazole-containing spirooxindole tetrahydroquinolines bearing three contiguous stereocenters in good to excellent yields (up to 99%) with high diastereoselectivities (up to >20 : 1 dr) and enantioselectivities (up to 88% ee). Moreover, the gram-scale synthesis and synthetic transformations were also demonstrated.
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Affiliation(s)
- Tong-Hao Li
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering (Ministry of Industry and Information Technology), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No.5 Zhongguancun South Street, Beijing 100081, People's Republic of China..
| | - Cheng Niu
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering (Ministry of Industry and Information Technology), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No.5 Zhongguancun South Street, Beijing 100081, People's Republic of China..
| | - Da-Ming Du
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering (Ministry of Industry and Information Technology), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No.5 Zhongguancun South Street, Beijing 100081, People's Republic of China..
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25
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Berne D, Caillol S, Ladmiral V, Leclerc E. Synthesis of polyester thermosets via internally catalyzed Michael-addition of methylene compounds on a 2-(trifluoromethyl)acrylate-derived building block. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Il’in AV, Gubaev AF, Zarzhitskaya EV, Islamov DR, Kuchaev ES. Phosphine-Catalyzed Reactions of Imides and Hydrophosphoryl Compounds Addition to Divinyl Sulfone. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222070039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Jiang ZY, Huang ZY, Yang H, Zhou L, Li QH, Zhao ZG. Cs 2CO 3 catalyzed direct aza-Michael addition of azoles to α,β-unsaturated malonates. RSC Adv 2022; 12:19265-19269. [PMID: 35865588 PMCID: PMC9248005 DOI: 10.1039/d2ra02314h] [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: 04/10/2022] [Accepted: 06/27/2022] [Indexed: 11/21/2022] Open
Abstract
A highly efficient method for the synthesis of azole derivatives via a direct aza-Michael addition of azoles to α,β-unsaturated malonates using Cs2CO3 as a catalyst, has been successfully developed. A series of azole derivatives have been obtained in up to 94% yield and the reaction could be amplified to gram scale in excellent yield in the presence of 10 mol% of Cs2CO3. A highly efficient method for the synthesis of azole derivatives via a direct aza-Michael addition of azoles to α,β-unsaturated malonates has been successfully developed. A series of azole derivatives have been obtained in up to 94% yield.![]()
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Affiliation(s)
- Zi-Yu Jiang
- Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Minzu University Chengdu 610041 P. R. China
| | - Zhe-Yao Huang
- Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Minzu University Chengdu 610041 P. R. China
| | - Hong Yang
- Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Minzu University Chengdu 610041 P. R. China
| | - Lin Zhou
- Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Minzu University Chengdu 610041 P. R. China
| | - Qing-Han Li
- Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Minzu University Chengdu 610041 P. R. China
| | - Zhi-Gang Zhao
- Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Minzu University Chengdu 610041 P. R. China
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28
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Łowicki D, Przybylski P. Cascade synthetic strategies opening access to medicinal-relevant aliphatic 3- and 4-membered N-heterocyclic scaffolds. Eur J Med Chem 2022; 238:114438. [PMID: 35567964 DOI: 10.1016/j.ejmech.2022.114438] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 04/26/2022] [Accepted: 04/30/2022] [Indexed: 12/23/2022]
Abstract
Cascade reactions are often 'employed' by nature to construct structurally diverse nitrogen-containing heterocycles in a highly stereoselective fashion, i.e., secondary metabolites important for pharmacy. Nitrogen-containing heterocycles of three- and four-membered rings, as standalone and bicyclic compounds, inhibit different enzymes and are pharmacophores of approved drugs or drug candidates considered in many therapies, e.g. anticancer, antibacterial or antiviral. Domino transformations are in most cases in line with modern green chemistry concepts due to atom economy, one-pot procedures often without use the protective groups, time-saving and at markedly lower costs than multistep transformations. The tandem approaches can help to obtain novel N-heterocyclic scaffolds, functionalized according to structural requirements of the target in cells, taking into account the nature of functional group and stereochemistry. On the other hand cascade strategies allow to modify small N-heterocyclic rings in a systematic way, which is beneficial for structure-activity relationship (SAR) analyses. This review is focused on the biological relevance of the N-heterocyclic scaffolds with smaller 3- and 4-membered rings among approved drugs and leading structures of drug candidates. The cascade synthetic strategies offering N-heterocyclic scaffolds, at relatively good yields and high stereoselectivity, are discussed here. The review covers mainly years from 2015 to 2021.
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Affiliation(s)
- Daniel Łowicki
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznan, Poland
| | - Piotr Przybylski
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznan, Poland.
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29
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Goulart TAC, Back DF, Moura E Silva S, Zeni G. Palladium-Catalyzed Cascade 5- endo-dig Cyclization of Ynamides to Form 4-Alkynyloxazolones. J Org Chem 2022; 87:3341-3351. [PMID: 35167299 DOI: 10.1021/acs.joc.1c02978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The selective synthesis of 4-alkynyloxazolones and their further applications as substrates to electrophile-promoted nucleophilic cyclization have been developed. The reaction of ynamides with terminal alkynes proceeded smoothly to give 4-alkynyloxazolones in the presence of a catalytic amount of palladium(II) acetate. The products were obtained with the sequential formation of new C-C and C-O bonds via a cascade procedure. The first step involved a carbon-oxygen bond formation, via a 5-endo-dig closure, which was confirmed by X-ray analyses of the crystalline sample. Subsequently, the reaction of 4-alkynyloxazolones with an electrophilic selenium source gave 3-phenylselanyl benzofuran derivatives via an electrophile-promoted nucleophilic cyclization.
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Affiliation(s)
- Tales A C Goulart
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE, UFSM, Santa Maria, Rio Grande do Sul 97105-900, Brazil
| | - Davi Fernando Back
- Laboratório de Materiais Inorgânicos, Departamento de Química, UFSM, Santa Maria, Rio Grande do Sul 97105-900, Brazil
| | - Sidnei Moura E Silva
- Laboratório de Biotecnologia de Produtos Naturais e Sintéticos, Instituto de Biotecnologia, Universidade de Caxias do Sul, Caxias do Sul, Rio Grande do Sul 95070-560, Brazil
| | - Gilson Zeni
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE, UFSM, Santa Maria, Rio Grande do Sul 97105-900, Brazil
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30
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Xie X, Yuan D, Ma B, Jin J, Wang E, Zhou W, Hu Y, Hu L, Wang J. Sterically and Temperature Controlled Divergent Cycloadditions of α,β‐Unsaturated Imines with Vinylethylene Carbonates: Insights from Experimental and DFT studies. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101423] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Dandan Yuan
- Nanjing University of Chinese Medicine CHINA
| | - Ben Ma
- Nanjing University of Chinese Medicine CHINA
| | - Jiaming Jin
- Nanjing University of Chinese Medicine CHINA
| | - Enpeng Wang
- Nanjing University of Chinese Medicine CHINA
| | - Wenyi Zhou
- Nanjing University of Chinese Medicine CHINA
| | - Yaowen Hu
- Nanjing University of Chinese Medicine CHINA
| | | | - Junwei Wang
- Nanjing University of Chinese Medicine CHINA
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31
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Gruzdev DA, Vakarov SA, Korolyova MA, Bartashevich EV, Tumashov AA, Chulakov EN, Ezhikova MA, Kodess MI, Levit GL, Krasnov VP. Acylative kinetic resolution of racemic methyl-substituted cyclic alkylamines with 2,5-dioxopyrrolidin-1-yl ( R)-2-phenoxypropanoate. Org Biomol Chem 2022; 20:862-869. [PMID: 35006228 DOI: 10.1039/d1ob02099d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The diastereoselective acylation of a number of racemic methyl-substituted cyclic alkylamines with active esters of 2-phenoxypropanoic acid was studied in detail. The ester of (R)-2-phenoxypropanoic acid and N-hydroxysuccinimide was found to be the most selective agent. The highest stereoselectivity was observed in the kinetic resolution of racemic 2-methylpiperidine in toluene at -40 °C (selectivity factor s = 73) with the predominant formation of (R,R)-amide (93.7% de). To explain the observed stereoselectivity, DFT modelling of the transition states in the reactions of the title acylating agent with 2-methylpiperidine and 2-methylpyrrolidine was performed. The calculated values were in good agreement with experimental data. It has been demonstrated that the acylation proceeds via a concerted mechanism, in which the addition of an amine occurs simultaneously with the elimination of the hydroxysuccinimide fragment. The high stereoselectivity of the (R,R)-amide formation is largely ensured by the lower steric hindrances in the transition states as compared to the formation of (R,S)-amide.
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Affiliation(s)
- Dmitry A Gruzdev
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Sergey A Vakarov
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Marina A Korolyova
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Ekaterina V Bartashevich
- South Ural State University (National Research University), 76 Lenina Ave., Chelyabinsk 454080, Russia
| | - Andrey A Tumashov
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Evgeny N Chulakov
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Marina A Ezhikova
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Mikhail I Kodess
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Galina L Levit
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Victor P Krasnov
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
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32
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Yoon S, Lee S, Nam SH, Lee H, Lee Y. Synthesis of N-substituted quaternary carbon centers through KO t-Bu-catalyzed aza-Michael addition of pyrazoles to cyclic enones. Org Biomol Chem 2022; 20:8313-8322. [DOI: 10.1039/d2ob01634f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This study reports an effective and mild protocol for the construction of N-substituted quaternary carbon centers via the KOt-Bu-catalyzed aza-Michael addition of pyrazoles with β-substituted cyclic enones.
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Affiliation(s)
- Subin Yoon
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Sungbin Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Seung Hyun Nam
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Hyejeong Lee
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Yunmi Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
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33
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Uppalabat T, Tapdara A, Khaikate O, Worakul T, Surawatanawong P, Leowanawat P, Soorukram D, Reutrakul V, Meesin J, Kuhakarn C. Synthesis of indolo- and benzothieno[3,2-c]quinolines via POCl3 mediated tandem cyclization of o-alkynylisocyanobenzenes derived from o-alkynyl-N-phenylformamides. NEW J CHEM 2022. [DOI: 10.1039/d2nj02791g] [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
A synthesis of indolo[3,2-c]quinolines and benzothieno[3,2-c]quinolines has been developed employing o-alkynyl-N-phenylformamide derivatives as the substrates. The reaction proceeded via a tandem process involving POCl3‒assisted intramolecular cyclization of the firstly formed...
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34
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Zhuang H, Lu N, Ji N, Han F, Miao C. Bu
4
NHSO
4
‐Catalyzed Direct
N
‐Allylation of Pyrazole and its Derivatives with Allylic Alcohols in Water: A Metal‐Free, Recyclable and Sustainable System. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100864] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Hongfeng Zhuang
- College of Chemistry and Material Science Shandong Agricultural University Tai'an 271018 Shandong People's Republic of China
| | - Nan Lu
- College of Chemistry and Material Science Shandong Agricultural University Tai'an 271018 Shandong People's Republic of China
| | - Na Ji
- College of Chemistry and Material Science Shandong Agricultural University Tai'an 271018 Shandong People's Republic of China
| | - Feng Han
- College of Chemistry and Material Science Shandong Agricultural University Tai'an 271018 Shandong People's Republic of China
| | - Chengxia Miao
- College of Chemistry and Material Science Shandong Agricultural University Tai'an 271018 Shandong People's Republic of China
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35
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Yang H, Wong MW. Water‐Assisted and Catalyst‐Free Hetero‐Michael Additions: Mechanistic Insights from DFT Investigations. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100632] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hui Yang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Ming Wah Wong
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
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36
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Gupta A, Condakes ML. Thermodynamic Understanding of an Aza-Michael Reaction Enables Five-Step Synthesis of the Potent Integrin Inhibitor MK-0429. J Org Chem 2021; 86:17523-17527. [PMID: 34723526 DOI: 10.1021/acs.joc.1c02375] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We describe a general strategy for the aza-Michael addition of nucleophilic heterocycles into β-substituted acrylates using potassium tert-butoxide as catalyst. Demonstrating that the reaction is under thermodynamic control underpins optimization efforts and enables rapid exploration of the substrate scope, with yields ranging from 55% to 94%. We further leverage these lessons in a significantly shortened synthesis of MK-0429, a potent pan-integrin inhibitor previously taken into human clinical trials for the treatment of prostate cancer and osteoporosis.
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Affiliation(s)
- Anya Gupta
- Department of Small Molecule Drug Discovery, Bristol Myers Squibb Company, 100 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Matthew L Condakes
- Department of Small Molecule Drug Discovery, Bristol Myers Squibb Company, 100 Binney Street, Cambridge, Massachusetts 02142, United States
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37
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Jung K, Kim S, Choi S, Kim I, Han G. Development of a DABCO-Succinic Acid Based Catalytic System for the Aza-Michael Addition and Aza-Michael/Knoevenagel Tandem Reaction of Thiazolidine-2,4-dione to Electron Deficient Alkenes. J Org Chem 2021; 86:16785-16794. [PMID: 34757757 DOI: 10.1021/acs.joc.1c02003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A DABCO catalyzed aza-Michael addition of thiazolidine-2,4-dione to a variety of electron deficient alkenes has been developed. Additionally, a DABCO/succinic acid salt system has been designed that allows for the one pot tandem aza-Michael/Knoevenagel reaction of thiazolidine-2,4-dione to give difunctionalized thiazolidine-2,4-dione products. To the best of our knowledge, this is the first example of a one-pot tandem aza-Michael/Knoevenagel reaction involving thiazolidine-2,4-dione.
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Affiliation(s)
- Kilsoo Jung
- Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon 21983, Republic of Korea
| | - Sunmi Kim
- Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon 21983, Republic of Korea
| | - Seonghwi Choi
- Department of Integrated OMICS for Biomedical Sciences (WCU Program), Yonsei University, Seoul 03722, Republic of Korea
| | - Ikyon Kim
- Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon 21983, Republic of Korea
| | - Gyoonhee Han
- Yonsei Institute of Pharmaceutical Sciences, College of Pharmacy, Yonsei University, Incheon 21983, Republic of Korea.,Department of Integrated OMICS for Biomedical Sciences (WCU Program), Yonsei University, Seoul 03722, Republic of Korea.,Department of Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
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38
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Kaur BP, Sharma V, Sahoo SC, Chimni SS. Low catalyst loading enabled organocatalytic synthesis of chiral bis-heterocyclic frameworks containing pyrazole and isoxazole. Org Biomol Chem 2021; 19:9910-9924. [PMID: 34734954 DOI: 10.1039/d1ob01313k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The organocatalytic asymmetric synthesis of enantiopure bis-heterocyclic molecules containing pyrazole and isoxazole under mild reaction conditions has been reported via a low-catalyst loading Michael addition reaction of pyrazolyl nitroalkenes with 1,3-dicarbonyl derivatives. 4-Substituted pyrazole derivatives were obtained in 60-87% yields and with 82-97% ee. These pyrazolyl derivatives are further transformed into chiral bis-heterocyclic derivatives in up to 82% yields and up to 99% ee. The synthesized pyrazole and isoxazole based bis-heterocyclic derivatives are potential bio-active molecules expected to have significant applications. Additionally, the synthesis of these bis-heterocycles can efficiently be carried out in one pot without any loss of enantiopurity, which further adds to its significance.
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Affiliation(s)
- Banni Preet Kaur
- Department of Chemistry, Guru Nanak Dev University, Amritsar-143005, India.
| | - Vivek Sharma
- Department of Chemistry, Guru Nanak Dev University, Amritsar-143005, India.
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39
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Wang L, Xin S, Zhang C, Ran X, Tang H, Cao D. Development of a novel chromophore reaction-based fluorescent probe for biogenic amines detection. J Mater Chem B 2021; 9:9383-9394. [PMID: 34729573 DOI: 10.1039/d1tb01791h] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biogenic amines (BAs) are important biomarkers to monitor meat spoilage. However, the design of efficient BA fluorescent probes with distinct colorimetric and ratiometric fluorescent dual-channels is still a critical challenge because of similar chemical properties and basicity between BAs and other amines. Herein, pyrrolopyrrole cyanine (PPCy-1) is reported to display distinctly high reactivity toward BAs through an ultrasensitive irreversible chromophore reaction for the first time. The reaction mechanism is ascribed to synergistic aza-Michael addition and B-N detachment, followed by hydrolysis to produce low-conjugated diketopyrrolopyrrole and heteroaromatic acetonitrile compounds. As a result, colorimetric and ratiometric fluorescent dual-channel (Δλab = 188 nm and Δλem = 151 nm) signals and a limit of detection up to 62.1 nM level for BA solution are acquired. In addition, the colorimetric detection of volatile amine vapor using the PPCy-1-loaded filter paper, showing a color change from green to yellow, is feasible. A simple and cost-effective fluorescence "turn on" method using the filter paper or the CAD-40 resin loaded with PPCy-1 to detect TVB (total volatile bases) originating from shrimp spoilage is further demonstrated.
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Affiliation(s)
- Lingyun Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, China.
| | - Shuqi Xin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, China.
| | - Chufeng Zhang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, China.
| | - Xueguang Ran
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science in South China, State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, 510641, China.
| | - Hao Tang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, China.
| | - Derong Cao
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510641, China.
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40
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Lv Y, Meng J, Li C, Wang X, Ye Y, Sun K. Update on the Synthesis of N‐Heterocycles via Cyclization of Hydrazones (2017–2021). Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101184] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yunhe Lv
- College of Chemistry and Chemical Engineering Anyang Normal University Anyang 4550008 People's Republic of China
| | - Jianping Meng
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
| | - Chen Li
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
| | - Xin Wang
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
| | - Yong Ye
- College of Chemistry Zhengzhou University Zhengzhou 450001 People's Republic of China
| | - Kai Sun
- College of Chemistry and Chemical Engineering Yantai University Yantai 264005 People's Republic of China
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41
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Novel capto-dative (Z,E)-2-(alkylthio)alk-2-en-4-ynals: synthesis and heterocyclization. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.11.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Torres J, Escolano M, Alzuet-Piña G, Sánchez-Roselló M, Del Pozo C. Double asymmetric intramolecular aza-Michael reaction: a convenient strategy for the synthesis of quinolizidine alkaloids. Org Biomol Chem 2021; 19:8740-8745. [PMID: 34581390 DOI: 10.1039/d1ob01488a] [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
A new methodology to access the quinolizidine skeleton in an asymmetric fashion was devised. It involves two consecutive intramolecular aza-Michael reactions of sulfinyl amines bearing a bis-enone moiety, in turn generated by a monodirectional cross metathesis reaction. The sequence, which takes place with excellent yields and diastereocontrol, was applied to the total synthesis of alkaloids lasubine I and myrtine.
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Affiliation(s)
- Javier Torres
- Department of Organic Chemistry, University of Valencia, Vicente Andrés Estellés s/n, 46100-Burjassot-Valencia, Spain.
| | - Marcos Escolano
- Department of Organic Chemistry, University of Valencia, Vicente Andrés Estellés s/n, 46100-Burjassot-Valencia, Spain.
| | - Gloria Alzuet-Piña
- Department of Inorganic Chemistry, University of Valencia, Vicente Andrés Estellés s/n, 46100-Burjassot-Valencia, Spain
| | - María Sánchez-Roselló
- Department of Organic Chemistry, University of Valencia, Vicente Andrés Estellés s/n, 46100-Burjassot-Valencia, Spain.
| | - Carlos Del Pozo
- Department of Organic Chemistry, University of Valencia, Vicente Andrés Estellés s/n, 46100-Burjassot-Valencia, Spain.
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43
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Sharma P, Gupta R, Bansal RK. Recent advances in organocatalytic asymmetric aza-Michael reactions of amines and amides. Beilstein J Org Chem 2021; 17:2585-2610. [PMID: 34760026 PMCID: PMC8551878 DOI: 10.3762/bjoc.17.173] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 09/27/2021] [Indexed: 11/23/2022] Open
Abstract
Nitrogen-containing scaffolds are ubiquitous in nature and constitute an important class of building blocks in organic synthesis. The asymmetric aza-Michael reaction (aza-MR) alone or in tandem with other organic reaction(s) is an important synthetic tool to form new C-N bond(s) leading to developing new libraries of diverse types of bioactive nitrogen compounds. The synthesis and application of a variety of organocatalysts for accomplishing highly useful organic syntheses without causing environmental pollution in compliance with 'Green Chemistry" has been a landmark development in the recent past. Application of many of these organocatalysts has been extended to asymmetric aza-MR during the last two decades. The present article overviews the literature published during the last 10 years concerning the asymmetric aza-MR of amines and amides catalysed by organocatalysts. Both types of the organocatalysts, i.e., those acting through non-covalent interactions and those working through covalent bond formation have been applied for the asymmetric aza-MR. Thus, the review includes the examples wherein cinchona alkaloids, squaramides, chiral amines, phase-transfer catalysts and chiral bifunctional thioureas have been used, which activate the substrates through hydrogen bond formation. Most of these reactions are accompanied by high yields and enantiomeric excesses. On the other hand, N-heterocyclic carbenes and chiral pyrrolidine derivatives acting through covalent bond formation such as the iminium ions with the substrates have also been included. Wherever possible, a comparison has been made between the efficacies of various organocatalysts in asymmetric aza-MR.
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Affiliation(s)
- Pratibha Sharma
- Department of Chemistry, The IIS (deemed to be University), Jaipur 302 020, India
| | - Raakhi Gupta
- Department of Chemistry, The IIS (deemed to be University), Jaipur 302 020, India
| | - Raj Kumar Bansal
- Department of Chemistry, The IIS (deemed to be University), Jaipur 302 020, India
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44
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Borah B, Dwivedi KD, Chowhan LR. Recent Advances in Metal‐ and Organocatalyzed Asymmetric Functionalization of Pyrroles. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100427] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Biplob Borah
- School of Applied Material Sciences Centre for Applied Chemistry Central University of Gujarat Sector-30 Gandhinagar 382030 India
| | - Kartikey Dhar Dwivedi
- School of Applied Material Sciences Centre for Applied Chemistry Central University of Gujarat Sector-30 Gandhinagar 382030 India
| | - L. Raju Chowhan
- School of Applied Material Sciences Centre for Applied Chemistry Central University of Gujarat Sector-30 Gandhinagar 382030 India
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45
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Semghouli A, Benke Z, Remete AM, Novák TT, Fustero S, Kiss L. Selective Transformation of Norbornadiene into Functionalized Azaheterocycles and β-Amino Esters with Stereo- and Regiocontrol. Chem Asian J 2021; 16:3873-3881. [PMID: 34498420 DOI: 10.1002/asia.202100956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 09/03/2021] [Indexed: 11/06/2022]
Abstract
Novel functionalized azaheterocycles with multiple chiral centers have been accessed from readily available norbornene β-amino acids or β-lactams across a stereocontrolled synthetic route, based on ring-opening metathesis (ROM) of the staring unsaturated bicyclic amino esters, followed by selective cyclization through ring-closing metathesis (RCM). The RCM transformations have been studied under various experimental conditions to assess the scope of conversion, catalyst, yield, and substrate influence. The structure of the starting norbornene β-amino acids predetermined the structure of the new azaheterocycles, and the developed synthetic route took place with the conservation of the configuration of the chiral centers.
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Affiliation(s)
- Anas Semghouli
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720, Szeged, Eötvös u. 6, Hungary.,University of Szeged, Interdisciplinary Excellence Centre, Institute of Pharmaceutical Chemistry, H-6720, Szeged, Eötvös u. 6, Hungary
| | - Zsanett Benke
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720, Szeged, Eötvös u. 6, Hungary.,University of Szeged, Interdisciplinary Excellence Centre, Institute of Pharmaceutical Chemistry, H-6720, Szeged, Eötvös u. 6, Hungary
| | - Attila M Remete
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720, Szeged, Eötvös u. 6, Hungary.,University of Szeged, Interdisciplinary Excellence Centre, Institute of Pharmaceutical Chemistry, H-6720, Szeged, Eötvös u. 6, Hungary
| | - Tamás T Novák
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720, Szeged, Eötvös u. 6, Hungary.,University of Szeged, Interdisciplinary Excellence Centre, Institute of Pharmaceutical Chemistry, H-6720, Szeged, Eötvös u. 6, Hungary
| | - Santos Fustero
- Department of Organic Chemistry, University of Valencia, Pharmacy Faculty, 46100-Burjassot, Valencia, Spain
| | - Loránd Kiss
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720, Szeged, Eötvös u. 6, Hungary.,University of Szeged, Interdisciplinary Excellence Centre, Institute of Pharmaceutical Chemistry, H-6720, Szeged, Eötvös u. 6, Hungary
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46
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Song Y, Du D. Recent Advances in Catalytic Asymmetric Aza‐Michael Addition Triggered Cascade Reactions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100624] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yong‐Xing Song
- College of Pharmacy Hebei University of Chinese Medicine Shijiazhuang 050200 Hebei Province People's Republic of China
| | - Da‐Ming Du
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
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47
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Nishino S, Miura M, Hirano K. An umpolung-enabled copper-catalysed regioselective hydroamination approach to α-amino acids. Chem Sci 2021; 12:11525-11537. [PMID: 34567503 PMCID: PMC8409476 DOI: 10.1039/d1sc03692k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 07/27/2021] [Indexed: 01/03/2023] Open
Abstract
A copper-catalysed regio- and stereoselective hydroamination of acrylates with hydrosilanes and hydroxylamines has been developed to afford the corresponding α-amino acids in good yields. The key to regioselectivity control is the use of hydroxylamine as an umpolung, electrophilic amination reagent. Additionally, a judicious choice of conditions involving the CsOPiv base and DTBM-dppbz ligand of remote steric hindrance enables the otherwise challenging C-N bond formation at the α position to the carbonyl. The point chirality at the β-position is successfully controlled by the Xyl-BINAP or DTBM-SEGPHOS chiral ligand with similarly remote steric bulkiness. The combination with the chiral auxiliary, (-)-8-phenylmenthol, also induces stereoselectivity at the α-position to form the optically active unnatural α-amino acids with two adjacent stereocentres.
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Affiliation(s)
- Soshi Nishino
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
| | - Masahiro Miura
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University Suita Osaka 565-0871 Japan
| | - Koji Hirano
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
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48
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Sánchez-Roselló M, Escolano M, Gaviña D, Del Pozo C. Two Decades of Progress in the Asymmetric Intramolecular aza-Michael Reaction. CHEM REC 2021; 22:e202100161. [PMID: 34415097 DOI: 10.1002/tcr.202100161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/22/2021] [Accepted: 08/04/2021] [Indexed: 11/08/2022]
Abstract
The asymmetric intramolecular aza-Michael reaction (IMAMR) is a very convenient strategy for the generation of heterocycles bearing nitrogen-substituted stereocenters. Due to the ubiquitous presence of these skeletons in natural products, the IMAMR has found widespread applications in the total synthesis of alkaloids and biologically relevant compounds. The development of asymmetric versions of the IMAMR are quite recent, most of them reported in this century. The fundamental advances in this field involve the use of organocatalysts. Chiral imidazolidinones, diaryl prolinol derivatives, Cinchone-derived primary amines and quaternary ammonium salts, and BINOL-derived phosphoric acids account for the success of those methodologies. Moreover, the use of N-sulfinyl imines with a dual role, as nitrogen nucleophiles and as chiral auxiliaries, appeared as a versatile mode of performing the asymmetric IMAMR.
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Affiliation(s)
- María Sánchez-Roselló
- Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100-Burjassot, Valencia), Spain
| | - Marcos Escolano
- Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100-Burjassot, Valencia), Spain
| | - Daniel Gaviña
- Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100-Burjassot, Valencia), Spain
| | - Carlos Del Pozo
- Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100-Burjassot, Valencia), Spain
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49
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Ouchakour L, Nonn M, Remete AM, Kiss L. An Improved Stereocontrolled Access Route to Piperidine or Azepane β‐Amino Esters and Azabicyclic β‐ and γ‐Lactams; Synthesis of Novel Functionalized Azaheterocyles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Lamiaa Ouchakour
- Institute of Pharmaceutical Chemistry University of Szeged 6720 Szeged Eötvös u. 6 Hungary
- Interdisciplinary Excellence Centre, Institute of Pharmaceutical Chemistry University of Szeged 6720 Szeged Eötvös u. 6 Hungary
| | - Melinda Nonn
- Institute of Pharmaceutical Chemistry University of Szeged 6720 Szeged Eötvös u. 6 Hungary
- Interdisciplinary Excellence Centre, Institute of Pharmaceutical Chemistry University of Szeged 6720 Szeged Eötvös u. 6 Hungary
| | - Attila M. Remete
- Institute of Pharmaceutical Chemistry University of Szeged 6720 Szeged Eötvös u. 6 Hungary
- Interdisciplinary Excellence Centre, Institute of Pharmaceutical Chemistry University of Szeged 6720 Szeged Eötvös u. 6 Hungary
| | - Loránd Kiss
- Institute of Pharmaceutical Chemistry University of Szeged 6720 Szeged Eötvös u. 6 Hungary
- Interdisciplinary Excellence Centre, Institute of Pharmaceutical Chemistry University of Szeged 6720 Szeged Eötvös u. 6 Hungary
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50
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Guerrero‐Corella A, Valle‐Amores MA, Fraile A, Alemán J. Enantioselective Organocatalyzed
aza
‐Michael Addition Reaction of 2‐Hydroxybenzophenone Imines to Nitroolefins under Batch and Flow Conditions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100635] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | - Miguel A. Valle‐Amores
- Organic Chemistry Department, Módulo 1 Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Alberto Fraile
- Organic Chemistry Department, Módulo 1 Universidad Autónoma de Madrid 28049 Madrid Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - José Alemán
- Organic Chemistry Department, Módulo 1 Universidad Autónoma de Madrid 28049 Madrid Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
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