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Recent Advances in Greener Asymmetric Organocatalysis Using Bio-Based Solvents. Catalysts 2023. [DOI: 10.3390/catal13030553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023] Open
Abstract
Efficient synthetic methods that avoid the extensive use of hazardous reagents and solvents, as well as harsh reaction conditions, have become paramount in the field of organic synthesis. Organocatalysis is notably one of the best tools in building chemical bonds between carbons and carbon-heteroatoms; however, most examples still employ toxic volatile organic solvents. Although a portfolio of greener solvents is now commercially available, only ethyl alcohol, ethyl acetate, 2-methyltetrahydrofuran, supercritical carbon dioxide, ethyl lactate, and diethyl carbonate have been explored with chiral organocatalysts. In this review, the application of these bio-based solvents in asymmetric organocatalytic methods reported in the last decade is discussed, highlighting the proposed mechanism pathway for the transformations.
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Li H, Yin L. Research Progress of Copper-Catalyzed Direct Vinylogous Reactions. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202201033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Jaiswal MK, Kumar R, Singh S, Jain S, Vanka K, Singh RP. The Vinylogous Michael Addition of 3‐Alkylidene‐2‐oxindoles to β,γ‐Unsaturated α‐Keto Esters by Bifunctional Cinchona Alkaloids. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000835] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Manish K. Jaiswal
- Department of Chemistry Indian Institute of Technology‐Delhi Hauz Khas 110016 New Delhi India
| | - Rajesh Kumar
- Department of Chemistry Indian Institute of Technology‐Delhi Hauz Khas 110016 New Delhi India
| | - Sanjay Singh
- Department of Chemistry Indian Institute of Technology‐Delhi Hauz Khas 110016 New Delhi India
| | - Shailija Jain
- Physical and Materials Chemistry Division National Chemical Laboratory Dr. Homi Bhabha Road 411008 Pune India
| | - Kumar Vanka
- Physical and Materials Chemistry Division National Chemical Laboratory Dr. Homi Bhabha Road 411008 Pune India
| | - Ravi P. Singh
- Department of Chemistry Indian Institute of Technology‐Delhi Hauz Khas 110016 New Delhi India
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da Silva AF, Leonarczyk IA, Ferreira MAB, Jurberg ID. Diastereodivergent aminocatalyzed spirocyclization strategies using 4-alkylideneisoxazol-5-ones and methyl vinyl ketones. Org Chem Front 2020. [DOI: 10.1039/d0qo00779j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Diasterodivergent aminocatalyzed approaches starting from 4-alkylideneisoxazol-5-ones and methyl vinyl ketones have been developed for the synthesis of racemic 6,10-cis-spiroisoxazol-5-ones and highly enantioenriched 6,10-trans-spiroisoxazol-5-ones.
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Affiliation(s)
| | - Ives A. Leonarczyk
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos
- São Carlos
- Brazil
| | - Marco A. B. Ferreira
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem)
- Department of Chemistry
- Federal University of São Carlos
- São Carlos
- Brazil
| | - Igor D. Jurberg
- Institute of Chemistry
- State University of Campinas
- Campinas
- Brazil
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Tiritan ME, Fernandes C, Maia AS, Pinto M, Cass QB. Enantiomeric ratios: Why so many notations? J Chromatogr A 2018; 1569:1-7. [PMID: 30025608 DOI: 10.1016/j.chroma.2018.07.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/05/2018] [Accepted: 07/09/2018] [Indexed: 12/16/2022]
Abstract
The correct quantification of enantiomers is pivotal in a variety of fields, such as pharmacokinetic studies, enantioselective syntheses, chemical characterization of natural products, authentication of fragrance and food, biodegradation behavior, accurate evaluation of environmental risk, and it can also provide information for sentencing guidance in forensic field. Enantioselective chromatography is the first choice to assess the composition of an enantiomeric mixture. Different notations have been used to express the measured enantiomeric ratios, which compromise the results and represent a challenge for data comparison. This manuscript critically discusses the currently used notations and exemplifies with applications in different fields indicating the advantages and disadvantages of one of the adopted systems. In order to simplify the notations, the use of enantiomeric ratio (e.r.%) as standardization for nonchiroptical methods is proposed.
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Affiliation(s)
- Maria E Tiritan
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde (IINFACTS), Rua Central de Gandra, 1317, 4585-116, Gandra PRD, Portugal; Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal; Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208, Matosinhos, Portugal
| | - Carla Fernandes
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal; Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208, Matosinhos, Portugal
| | - Alexandra S Maia
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde (IINFACTS), Rua Central de Gandra, 1317, 4585-116, Gandra PRD, Portugal
| | - Madalena Pinto
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal; Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208, Matosinhos, Portugal
| | - Quezia B Cass
- SEPARARE, Departamento de Química, Universidade Federal de São Carlos, Rodovia Washington Luiz, km 235, São Carlos, 13565-905, SP, Brazil.
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