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Shikari A, Mandal K, Chopra D, Pan SC. Organocatalytic Asymmetric Synthesis of Cyclic Acetals with Spirooxindole Skeleton. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101057] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Amit Shikari
- Department of Chemistry Indian Institute of Technology Guwahati Assam 781039 India
| | - Koushik Mandal
- Department of Chemistry Indian Institute of Science Education and Research Bhopal 462066 India
| | - Deepak Chopra
- Department of Chemistry Indian Institute of Science Education and Research Bhopal 462066 India
| | - Subhas Chandra Pan
- Department of Chemistry Indian Institute of Technology Guwahati Assam 781039 India
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2
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Parida C, Mondal B, Ghosh A, Pan SC. Organocatalytic Asymmetric Synthesis of Spirooxindole Embedded Oxazolidines. J Org Chem 2021; 86:13082-13091. [PMID: 34448585 DOI: 10.1021/acs.joc.1c00644] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The first organocatalytic asymmetric synthesis of spirooxindole embedded oxazolidines has been developed via a domino reaction involving hemiaminal formation, followed by an unprecedented aza-Michael reaction between isatin derived N-Boc ketimines and γ-hydroxy enones. A quinine derived bifunctional squaramide catalyst was found to be efficient for this reaction, and the products were obtained in good diastereoselectivity and with high enantioselectivity.
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Affiliation(s)
- Chandrakanta Parida
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Buddhadeb Mondal
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Animesh Ghosh
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Subhas Chandra Pan
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
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3
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Sang JW, Xie MS, Wang MM, Qu GR, Guo HM. Chemo- and regioselective ring-opening of donor-acceptor oxiranes with N-heteroaromatics. Chem Commun (Camb) 2021; 57:4552-4555. [PMID: 33956013 DOI: 10.1039/d1cc00600b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The first ring-opening of D-A oxiranes with N-heteroaromatics in a chemoselective C-C bond cleavage manner was achieved. In the presence of 5 mol% of Y(OTf)3 as the catalyst, diverse N-heteroaromatics, including benzotriazoles, purines, substituted benzimidazole, imidazole and pyrazole, reacted well with various D-A oxiranes, providing acyclic nucleoside analogues containing a N-glycosidic bond in up to 97% yield and up to >95 : 5 regioselectivity. Through simple transformation, the Ganciclovir analogue could also be obtained.
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Affiliation(s)
- Ji-Wei Sang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Ming-Sheng Xie
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Man-Man Wang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Gui-Rong Qu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Hai-Ming Guo
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
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4
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Bernhard Y, Gilbert J, Bousquet T, Favrelle-Huret A, Zinck P, Pellegrini S, Pelinski L. One-Pot Synthesis of 2,5-Disubstituted Furans through In Situ Formation of Allenes and Enolization Cascade. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yann Bernhard
- ENSCL, Centrale Lille, Univ. Artois, UMR 8181 UCCSUnité de Catalyse et Chimie du Solide; Univ. Lille; 59000 Lille France
| | - Joachim Gilbert
- ENSCL, Centrale Lille, Univ. Artois, UMR 8181 UCCSUnité de Catalyse et Chimie du Solide; Univ. Lille; 59000 Lille France
| | - Till Bousquet
- ENSCL, Centrale Lille, Univ. Artois, UMR 8181 UCCSUnité de Catalyse et Chimie du Solide; Univ. Lille; 59000 Lille France
| | - Audrey Favrelle-Huret
- ENSCL, Centrale Lille, Univ. Artois, UMR 8181 UCCSUnité de Catalyse et Chimie du Solide; Univ. Lille; 59000 Lille France
| | - Philippe Zinck
- ENSCL, Centrale Lille, Univ. Artois, UMR 8181 UCCSUnité de Catalyse et Chimie du Solide; Univ. Lille; 59000 Lille France
| | - Sylvain Pellegrini
- ENSCL, Centrale Lille, Univ. Artois, UMR 8181 UCCSUnité de Catalyse et Chimie du Solide; Univ. Lille; 59000 Lille France
| | - Lydie Pelinski
- ENSCL, Centrale Lille, Univ. Artois, UMR 8181 UCCSUnité de Catalyse et Chimie du Solide; Univ. Lille; 59000 Lille France
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Abstract
Furans are five-membered aromatic heterocycles containing one oxygen atom that are important
building blocks in organic chemistry, but also as natural products found in various natural
sources, mostly in plants, algae and microorganisms. In this review, we discussed recent advances in the
synthesis of furan compounds. Some classical methods have been modified and improved, while other
new methods have been developed. A vast variety of catalysts was used for these transformations. In
many studies, furan synthesis reaction mechanisms were also investigated and proposed.
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Affiliation(s)
- Dau Xuan Duc
- Department of Chemistry, Vinh University, Vinh City, Vietnam
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6
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Fan J, Wang S, Chen J, Wu M, Zhang J, Xie M. Synthesis of 2-acetyl trisubstituted furans via copper-mediated deacylation cleavage of unstrained C(sp3)–C(sp2) bonds. Org Chem Front 2019. [DOI: 10.1039/c8qo01139g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A copper-mediated tandem addition/cyclization/carbon–carbon cleavage reaction for the convenient synthesis of 2-acyl trisubstituted furans has been developed.
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Affiliation(s)
- Jian Fan
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
| | - Shengke Wang
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
| | - Jiahui Chen
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
| | - Manyi Wu
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
| | - Jitan Zhang
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
| | - Meihua Xie
- Key Laboratory of Functional Molecular Solids (Ministry of Education)
- Anhui Key Laboratory of Molecular Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241002
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7
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Mondal B, Pan SC. Organocatalytic Asymmetric Cascade Reaction betweeno-Hydroxycinnamaldehydes andγ/δ-Hydroxyenones: A Route to Tetrahydrofuran/Tetrahydropyran-Fused 3,4-Dihydrocoumarins. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800900] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Buddhadeb Mondal
- Department of Chemistry; Indian Institute of Technology Guwahati, Assam; India 781039
| | - Subhas Chandra Pan
- Department of Chemistry; Indian Institute of Technology Guwahati, Assam; India 781039
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8
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Schlegel M, Coburger P, Schneider C. A Novel Sc(OTf) 3 -Catalyzed (2+2+1)-Cycloannulation/Aza-Friedel-Crafts Alkylation Sequence toward Multicyclic 2-Pyrrolines. Chemistry 2018; 24:14207-14212. [PMID: 29939442 DOI: 10.1002/chem.201802478] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Indexed: 12/13/2022]
Abstract
The rapid assembly of molecular complexity continues to be at the forefront of novel reaction development. In the pursuit of that goal, we herein report a novel Sc(OTf)3 -catalyzed, one-pot multicomponent reaction that furnishes complex multicyclic 2-pyrrolines with excellent overall yields and perfect diastereocontrol. This process is based on our previously established (2+2+1)-cycloannulation of in situ generated 1-azaallyl cations, 1,3-dicarbonyls and primary amines. The newly formed and highly reactive aminal moiety is readily substituted with indoles and pyrroles both as external and internal π-nucleophiles to provide densely functionalized N-heterocycles with four new σ-bonds and two vicinal quaternary stereogenic centers. In addition, DFT calculations have been conducted to further characterize the intermediate 1-azaallyl cations.
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Affiliation(s)
- Marcel Schlegel
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103, Leipzig, Germany
| | - Peter Coburger
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, 04103, Leipzig, Germany
| | - Christoph Schneider
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103, Leipzig, Germany
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9
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Mondal B, Maity R, Pan SC. Highly Diastereo- and Enantioselective Synthesis of Spiro-tetrahydrofuran-pyrazolones via Organocatalytic Cascade Reaction between γ-Hydroxyenones and Unsaturated Pyrazolones. J Org Chem 2018; 83:8645-8654. [DOI: 10.1021/acs.joc.8b00781] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Buddhadeb Mondal
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Rajendra Maity
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Subhas Chandra Pan
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
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