51
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Yunusova SN, Bolotin DS, Vovk MA, Tolstoy PM, Kukushkin VY. Tetrabromomethane as an Organic Catalyst: a Kinetic Study of CBr
4
‐Catalyzed Schiff Condensation. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001180] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Sevilya N. Yunusova
- Institute of Chemistry Saint Petersburg State University Universitetskaya Nab. 7/9 Saint Petersburg Russian Federation
| | - Dmitrii S. Bolotin
- Institute of Chemistry Saint Petersburg State University Universitetskaya Nab. 7/9 Saint Petersburg Russian Federation
| | - Mikhail A. Vovk
- Center for Magnetic Resonance Saint Petersburg State University Saint Petersburg Russian Federation
| | - Peter M. Tolstoy
- Institute of Chemistry Saint Petersburg State University Universitetskaya Nab. 7/9 Saint Petersburg Russian Federation
| | - Vadim Yu. Kukushkin
- Institute of Chemistry Saint Petersburg State University Universitetskaya Nab. 7/9 Saint Petersburg Russian Federation
- Laboratory of Crystal Engineering of Functional Materials South Ural State University 76, Lenin Av. 454080 Chelyabinsk Russian Federation
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52
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Ferreira VF, de B. da Silva T, Pauli FP, Ferreira PG, da S. M. Forezi L, de S. Lima CG, de C. da Silva F. Dimroth´s Rearrangement as a Synthetic Strategy Towards New Heterocyclic Compounds. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200805114837] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Molecular rearrangements are important tools to increase the molecular diversity
of new bioactive compounds, especially in the class of heterocycles. This review deals
specifically with a very famous and widely applicable rearrangement known as the Dimroth
Rearrangement. Although it has originally been observed for 1,2,3-triazoles, its amplitude
was greatly expanded to other heterocycles, as well as from laboratory to large
scale production of drugs and intermediates. The reactions that were discussed in this review
were selected with the aim of demonstrating the windows that may be open by the
Dimroth's rearrangement, especially in what regards the development of new synthetic approaches
toward biologically active compounds.
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Affiliation(s)
- Vitor F. Ferreira
- Universidade Federal Fluminense, Departamento de Tecnologia Farmaceutica, Faculdade de Farmacia, CEP 24241-002, Niteroi- RJ, Brazil
| | - Thais de B. da Silva
- Universidade Federal Fluminense, Departamento de Tecnologia Farmaceutica, Faculdade de Farmacia, CEP 24241-002, Niteroi- RJ, Brazil
| | - Fernanda P. Pauli
- Universidade Federal Fluminense, Instituto de Quimica, Departamento de Quimica Organica, CEP 24020-150, Niteroi- RJ, Brazil
| | - Patricia G. Ferreira
- Universidade Federal Fluminense, Departamento de Tecnologia Farmaceutica, Faculdade de Farmacia, CEP 24241-002, Niteroi- RJ, Brazil
| | - Luana da S. M. Forezi
- Universidade Federal Fluminense, Instituto de Quimica, Departamento de Quimica Organica, CEP 24020-150, Niteroi- RJ, Brazil
| | - Carolina G. de S. Lima
- Universidade Federal Fluminense, Instituto de Quimica, Departamento de Quimica Organica, CEP 24020-150, Niteroi- RJ, Brazil
| | - Fernando de C. da Silva
- Universidade Federal Fluminense, Instituto de Quimica, Departamento de Quimica Organica, CEP 24020-150, Niteroi- RJ, Brazil
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53
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Yang L, Zhao JQ, You Y, Wang ZH, Yuan WC. Organocatalytic enantioselective tandem sulfa-Michael/aldol reaction to access dihydrothiopyran-fused benzosulfolane skeletons bearing three contiguous stereocenters. Chem Commun (Camb) 2020; 56:12363-12366. [PMID: 32930199 DOI: 10.1039/d0cc04840b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The first organocatalytic diastereo- and enantioselective tandem sulfa-Michael/aldol reaction of 2-mercaptoindole-3-carbaldehydes and 2-mercaptobenzaldehydes with benzo[b]thiophene sulfones was developed. With multiple hydrogen-bonding thiourea as a catalyst, a wide range of polycyclic dihydrothiopyran-fused benzosulfolanes were smoothly obtained with excellent results (up to 99% yield, >20 : 1 dr and 99% ee) under mild reaction conditions.
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Affiliation(s)
- Lei Yang
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, 610041, China
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54
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Abstract
Arylidene-Δ2-pyrrolin-4-ones undergo organocatalyzed double spirocyclization with 3-isothiocianato oxindoles in a domino 1,4/1,2-addition sequence. The products contain three contiguous stereocenters (ee up to 98%, dr up to 99:1, 12 examples). The absolute configuration of the major diastereomer was determined by single crystal X-ray analysis. Along with heterocyclic Michael acceptors based on oxazolone, isoxazolone, thiazolidinone, pyrazolone, and pyrimidinedione, the reported results display the applicability of unsaturated Δ2-pyrrolin-4-ones (pyrrolones) for the organocatalyzed construction of 3D-rich pyrrolone-containing heterocycles.
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55
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Benda MC, France S. Chiral disulfonimides: a versatile template for asymmetric catalysis. Org Biomol Chem 2020; 18:7485-7513. [PMID: 32940322 DOI: 10.1039/d0ob01742f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Since the emergence of pseudo-C2-symmetric chiral phosphoric acids (CPA), much work has been done to utilize these systems in stereoselective, organocatalytic processes. Despite the success in this field, reasonably basic substrates such as imines are often required to achieve appreciable activation. In order to access a wider variety of potential reaction partners, many related organocatalysts with enhanced Brønsted acidity have since been developed. Chiral disulfonimides (DSIs) have materialized as one such powerful class of organocatalysts and have been shown to expand the list of potential substrates to include aldehydes and ketones via Brønsted, Lewis, or bifunctional acid activation. This versatility renders DSIs amenable to an impressive scope of reaction types, typically with remarkable stereoselectivity induced by asymmetric counteranion-directed catalysis (ACDC). This review serves to provide a complete analysis of the successful applications, mechanistic insights, and unmet challenges exhibited to date in DSI-catalyzed and -assisted processes.
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Affiliation(s)
- Meghan C Benda
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
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56
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Song X, Yan RJ, Du W, Chen YC. Asymmetric Dearomative Cascade Multiple Functionalizations of Activated N-Alkylpyridinium and N-Alkylquinolinium Salts. Org Lett 2020; 22:7617-7621. [PMID: 32940478 DOI: 10.1021/acs.orglett.0c02828] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An enantioselective cascade reaction of N-alkylpyridinium and -quinolinium salts with o-hydroxybenzylideneacetones to access fused polyheterocycles through cross dienamine-mediated addition followed by trapping of the dearomatized enamine-type intermediates and aminal formation has been developed. A cascade assembly of N-benzyl-4-methylpyridinium salt and cyclic 2,4-dienones is further disclosed to give bridged frameworks via repetitive dearomatization and aromatization activation.
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Affiliation(s)
- Xue Song
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ru-Jie Yan
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China.,College of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
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57
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Krishna AV, Reddy GS, Gorachand B, Ramachary DB. Organocatalytic Asymmetric Formal [3+3]‐Cycloaddition to Access 2,3‐Diazaspiro[4.5]deca‐3,6‐dien‐1‐ones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001175] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- A. Vamshi Krishna
- Catalysis Laboratory School of Chemistry University of Hyderabad 500 046 Hyderabad India
| | - G. Surendra Reddy
- Catalysis Laboratory School of Chemistry University of Hyderabad 500 046 Hyderabad India
| | - B. Gorachand
- Catalysis Laboratory School of Chemistry University of Hyderabad 500 046 Hyderabad India
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58
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Maiti S, Leonardi M, Cores Á, Tenti G, Ramos MT, Villacampa M, Menéndez JC. Synthesis of 1,4-Diazepanes and Benzo[ b][1,4]diazepines by a Domino Process Involving the In Situ Generation of an Aza-Nazarov Reagent. J Org Chem 2020; 85:11924-11933. [DOI: 10.1021/acs.joc.0c01774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Swarupananda Maiti
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - Marco Leonardi
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - Ángel Cores
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - Giammarco Tenti
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - M. Teresa Ramos
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - Mercedes Villacampa
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - J. Carlos Menéndez
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
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59
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Giomi D, Ceccarelli J, Salvini A, Brandi A. Organocatalytic Reduction of Nitroarenes with Phenyl(2‐quinolyl)methanol. ChemistrySelect 2020. [DOI: 10.1002/slct.202003234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Donatella Giomi
- Dipartimento di Chimica ‘Ugo Schiff' Università degli Studi di Firenze Via della Lastruccia 3–13 I-50019 Sesto Fiorentino (Fi) Italy
| | - Jacopo Ceccarelli
- Dipartimento di Chimica ‘Ugo Schiff' Università degli Studi di Firenze Via della Lastruccia 3–13 I-50019 Sesto Fiorentino (Fi) Italy
| | - Antonella Salvini
- Dipartimento di Chimica ‘Ugo Schiff' Università degli Studi di Firenze Via della Lastruccia 3–13 I-50019 Sesto Fiorentino (Fi) Italy
| | - Alberto Brandi
- Dipartimento di Chimica ‘Ugo Schiff' Università degli Studi di Firenze Via della Lastruccia 3–13 I-50019 Sesto Fiorentino (Fi) Italy
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60
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Chang MY, Chen KT, Chen HY. One-pot construction of dispirocyclohexanes via K 2CO 3-mediated desulfonylative Michael-Michael-aldol (2 + 2 + 2) annulation of sulfonyl 2-pyridyl flavanones and methylketones. Org Biomol Chem 2020; 18:6297-6311. [PMID: 32744268 DOI: 10.1039/d0ob01404d] [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
K2CO3-mediated one-pot tandem conversion from sulfonyl 2-pyridyl flavanones to dipyridyl dispirocyclohexanes with contiguous multiple stereogenic centers was accomplished in good yields via an intramolecular desulfonylative ring-contraction of sulfonyl 2-pyridyl flavanones followed by an intermolecular Michael-Michael-aldol (2 + 2 + 2) annulation of the resulting pyridyl aurone intermediate with methyl ketones under facile, open-vessel, inexpensive and environmentally friendly reaction conditions. A plausible mechanism is proposed and discussed herein. This protocol provides a highly effective ring-closure via three carbon-carbon (C-C) bond formation.
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Affiliation(s)
- Meng-Yang Chang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan. and Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
| | - Kuan-Ting Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
| | - Han-Yu Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
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61
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Wang M, Tseng P, Chi W, Suresh S, Edukondalu A, Chen Y, Lin W. Diversity‐Oriented Synthesis of Spirocyclohexene Indane‐1,3‐diones and Coumarin‐Fused Cyclopentanes via an Organobase‐Controlled Cascade Reaction. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000597] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Min Wang
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Ping‐Yao Tseng
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Woei‐Jye Chi
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Sundaram Suresh
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Athukuri Edukondalu
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Yi‐Ru Chen
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Wenwei Lin
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
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62
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Hu S, Wang J, Huang G, Zhu K, Chen F. Organocatalytic Asymmetric Domino Oxa-Michael-Mannich-[1,3]-Amino Rearrangement Reaction of N-Tosylsalicylimines to α,β-Unsaturated Aldehydes by Diarylprolinol Silyl Ethers. J Org Chem 2020; 85:4011-4018. [PMID: 31829579 DOI: 10.1021/acs.joc.9b02939] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An organocatalytic asymmetric enantioselective domino oxa-Michael-Mannich-[1,3]-amino rearrangement reaction of N-tosylsalicylimines with a wide range of α,β-unsaturated aldehydes utilizing diarylprolinol silyl ether catalysis is described. The catalytic reactions proceed with excellent enantioselectivity (up to 99% ee) to produce the corresponding chair N-tosylimines-chromenes with a yield of up to 99%, tolerating a range of functional groups. This methodology offers a new method with great potential to further extend the synthetic power and versatility of chiral aminocatalysis.
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Affiliation(s)
- Sha Hu
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Jiaqi Wang
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Guanxin Huang
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Kejie Zhu
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Fener Chen
- Department of Chemistry, Fudan University, Shanghai 200433, China.,Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, 18 Chao Wang Road, Hangzhou 310014, China
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63
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Bertuzzi G, Silvestrini F, Moimare P, Pecorari D, Mazzanti A, Bernardi L, Fochi M. Chemodivergent Preparation of Various Heterocycles
via
Phase‐Transfer Catalysis: Enantioselective Synthesis of Functionalized Piperidines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901500] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Giulio Bertuzzi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Filippo Silvestrini
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Pierluigi Moimare
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Daniel Pecorari
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Andrea Mazzanti
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Luca Bernardi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Mariafrancesca Fochi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
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64
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Steppeler F, Iwan D, Wojaczyńska E, Wojaczyński J. Chiral Thioureas-Preparation and Significance in Asymmetric Synthesis and Medicinal Chemistry. Molecules 2020; 25:E401. [PMID: 31963671 PMCID: PMC7024223 DOI: 10.3390/molecules25020401] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 01/14/2020] [Accepted: 01/16/2020] [Indexed: 01/23/2023] Open
Abstract
For almost 20 years, thioureas have been experiencing a renaissance of interest with the emerged development of asymmetric organocatalysts. Due to their relatively high acidity and strong hydrogen bond donor capability, they differ significantly from ureas and offer, appropriately modified, great potential as organocatalysts, chelators, drug candidates, etc. The review focuses on the family of chiral thioureas, presenting an overview of the current state of knowledge on their synthesis and selected applications in stereoselective synthesis and drug development.
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Affiliation(s)
- Franz Steppeler
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland; (F.S.); (D.I.)
| | - Dominika Iwan
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland; (F.S.); (D.I.)
| | - Elżbieta Wojaczyńska
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland; (F.S.); (D.I.)
| | - Jacek Wojaczyński
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie St., 50 383 Wrocław, Poland;
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65
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Ray Choudhury A, Mukherjee S. Deconjugated butenolide: a versatile building block for asymmetric catalysis. Chem Soc Rev 2020; 49:6755-6788. [PMID: 32785345 DOI: 10.1039/c9cs00346k] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Deconjugated butenolides have emerged as a popular synthon for the enantioselective synthesis of γ-lactones. This review provides a comprehensive overview on the catalytic asymmetric reactions of deconjugated butenolides reported till date.
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Affiliation(s)
| | - Santanu Mukherjee
- Department of Organic Chemistry
- Indian Institute of Science
- Bangalore 560 012
- India
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66
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Martins RDS, Pereira MP, de Castro PP, Bombonato FI. Design and preparation of a novel prolinamide-based organocatalyst for the solvent-free asymmetric aldol reaction. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130855] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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67
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Xu K, Chen W, Chen X, Wang B, Huang J, Tian X. Organocatalytic asymmetric Friedel–Crafts alkylation/hemiketalization/lactonization cascade reactions: highly enantioselective synthesis of furo[2,3-b]benzofuranones. Org Chem Front 2020. [DOI: 10.1039/d0qo00475h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A highly diastereo- and enantioselective organocatalytic Friedel–Crafts alkylation/hemiketalization/lactonization cascade reaction generating furo[2,3-b]benzofuranones in good to excellent yields with high stereoselectivities.
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Affiliation(s)
- Kunhua Xu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & The Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- China
| | - Wenming Chen
- Department of Pharmaceutical Production Center
- The First Affiliated Hospital of Hunan University of Chinese Medicine
- Changsha
- China
| | - Xu Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & The Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- China
| | - Biao Wang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & The Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- China
| | - Jun Huang
- Sino-French Hoffmann Institute
- Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology
- The Second Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
| | - Xu Tian
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & The Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- China
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68
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Velardo A, Capaccio V, Caruso T, Di Mola A, Massa A, Tedesco C, Caporaso L, Falivene L, Palombi L. Desymmetrization of 2-Cyano- N
-tosylbenzylidenimine with Thiols and Organocatalytic Heterocyclization by Dynamic Resolution: Mechanism Investigation. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901499] [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)
- Amalia Velardo
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Vito Capaccio
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Tonino Caruso
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Antonia Di Mola
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Antonio Massa
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Consiglia Tedesco
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Lucia Caporaso
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Laura Falivene
- Chemical and Life Sciences and Engineering; Kaust Catalysis Center; King Abdullah University of Science and Technology; 23955-6900 Thuwal Saudi Arabia
| | - Laura Palombi
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
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69
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Majee D, Jakkampudi S, Arman HD, Zhao JCG. Enantioselective Synthesis of Cyclohexenol Derivatives from γ-Aryl-Substituted Enals via an Organocatalyzed Three-Component Reaction. Org Lett 2019; 21:9166-9170. [DOI: 10.1021/acs.orglett.9b03532] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Debashis Majee
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Satish Jakkampudi
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Hadi D. Arman
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - John C.-G. Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
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70
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Ling F, Chen J, Xie Z, Hou H, Pan Z, Feng C, Shen H, Zhong W. Synthesis of substituted quinolines via B(C
6
F
5
)
3
‐catalyzed aniline‐aldehyde‐pyruvate oxidative annulation. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3730] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Fei Ling
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou People's Republic of China
| | - Jiachen Chen
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou People's Republic of China
| | - Zhen Xie
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou People's Republic of China
| | - Huacui Hou
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou People's Republic of China
| | - Zhentao Pan
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou People's Republic of China
| | - Cong Feng
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou People's Republic of China
| | - Haiwei Shen
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou People's Republic of China
| | - Weihui Zhong
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical SciencesZhejiang University of Technology Hangzhou People's Republic of China
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71
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Mujahed S, Valentini F, Cohen S, Vaccaro L, Gelman D. Polymer-Anchored Bifunctional Pincer Catalysts for Chemoselective Transfer Hydrogenation and Related Reactions. CHEMSUSCHEM 2019; 12:4693-4699. [PMID: 31368199 DOI: 10.1002/cssc.201901728] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 07/31/2019] [Indexed: 06/10/2023]
Abstract
A series of polymer-supported cooperative PC(sp3 )P pincer catalysts was synthesized and characterized. Their catalytic activity in the acceptorless dehydrogenative coupling of alcohols and the transfer hydrogenation of aldehydes with formic acid as a hydrogen source was investigated. This comparative study, examining homogeneous and polymer-tethered species, proved that carefully designing a link between the support and the catalytic moiety, which takes into consideration the mechanism underlying the target transformation, might lead to superior heterogeneous catalysis.
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Affiliation(s)
- Shrouq Mujahed
- Institute of Chemistry, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Federica Valentini
- Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto, 8, 06124, Perugia, Italy
| | - Shirel Cohen
- Institute of Chemistry, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Luigi Vaccaro
- Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto, 8, 06124, Perugia, Italy
| | - Dmitri Gelman
- Institute of Chemistry, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
- Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklay St., 6, 117198, Moscow, Russia
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72
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Ghazvini HJ, Armaghan M, Janiak C, Balalaie S, Müller TJJ. Coupling‐Isomerization‐Cycloisomerization Reaction (CICIR) – An Unexpected and Efficient Domino Approach to Luminescent 2‐(Hydroxymethylene)indenones. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Helya Janatian Ghazvini
- Institut für Organische Chemie und Makromolekular Chemie Heinrich‐Heine‐Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
- Peptide Chemistry Research Center K. N. Toosi University of Technology P. O. Box 15875‐4416 Tehran Iran
| | - Mahsa Armaghan
- Institut für Anorganische Chemie und Strukturchemie Heinrich‐Heine‐Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie Heinrich‐Heine‐Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
| | - Saeed Balalaie
- Peptide Chemistry Research Center K. N. Toosi University of Technology P. O. Box 15875‐4416 Tehran Iran
| | - Thomas J. J. Müller
- Institut für Organische Chemie und Makromolekular Chemie Heinrich‐Heine‐Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
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73
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Abstract
In this study, a set of enantiomerically pure aziridines bearing a phosphine oxide moiety were prepared in high yields and tested as chiral catalysts in the direct asymmetric Mannich reaction of hydroxyacetone, an amine (p-anisidine), and various aromatic aldehydes. The appropriate Mannich adducts were formed in chemical yields from moderate to good with a high level of enantio- and diastereoselectivity. The best results were obtained using the catalysts bearing a free NH-aziridine subunit.
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74
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Grošelj U, Ciber L, Gnidovec J, Testen Ž, Požgan F, Štefane B, Tavčar G, Svete J, Ričko S. Synthesis of Spiro‐Δ
2
‐Pyrrolin‐4‐One Pseudo Enantiomers
via
an Organocatalyzed Sulfa‐Michael/Aldol Domino Sequence. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900747] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Uroš Grošelj
- Faculty of Chemistry and ChemicalTechnology, University of Ljubljana Večna pot 113 SI-1000 Ljubljana, Slovenia
| | - Luka Ciber
- Faculty of Chemistry and ChemicalTechnology, University of Ljubljana Večna pot 113 SI-1000 Ljubljana, Slovenia
| | - Jan Gnidovec
- Faculty of Chemistry and ChemicalTechnology, University of Ljubljana Večna pot 113 SI-1000 Ljubljana, Slovenia
| | - Žan Testen
- Faculty of Chemistry and ChemicalTechnology, University of Ljubljana Večna pot 113 SI-1000 Ljubljana, Slovenia
| | - Franc Požgan
- Faculty of Chemistry and ChemicalTechnology, University of Ljubljana Večna pot 113 SI-1000 Ljubljana, Slovenia
| | - Bogdan Štefane
- Faculty of Chemistry and ChemicalTechnology, University of Ljubljana Večna pot 113 SI-1000 Ljubljana, Slovenia
| | - Gašper Tavčar
- Inorganic Chemistry and Technology – K1J. Stefan Institute Jamova 39 1000 Ljubljana Slovenia
| | - Jurij Svete
- Faculty of Chemistry and ChemicalTechnology, University of Ljubljana Večna pot 113 SI-1000 Ljubljana, Slovenia
| | - Sebastijan Ričko
- Faculty of Chemistry and ChemicalTechnology, University of Ljubljana Večna pot 113 SI-1000 Ljubljana, Slovenia
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75
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Retini M, Bartolucci S, Bartoccini F, Mari M, Piersanti G. Concise and Convergent Enantioselective Total Syntheses of (+)- and (-)-Fumimycin. J Org Chem 2019; 84:12221-12227. [PMID: 31476858 DOI: 10.1021/acs.joc.9b02020] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The concise and convergent total syntheses of (+)- and (-)-Fumimycin have been achieved by taking advantage of strategies for the asymmetric aza-Friedel-Crafts reaction of a highly substituted hydroquinone and N-fumaryl ketimine generated from the corresponding dehydroalanine. The enantiomerically pure natural product and its enantiomer were prepared in seven steps and 22% overall yield by employing both enantiomers of a BINOL-derived chiral phosphoric acid (CPA) catalyst.
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Affiliation(s)
- Michele Retini
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Silvia Bartolucci
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Francesca Bartoccini
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Michele Mari
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Giovanni Piersanti
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
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76
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Lang J, Li Y, Kang T, Feng X, Liu X. Organocatalytic Asymmetric Michael/Dieckmann Cyclization Reaction of Alkynones To Construct Spirocyclopentene Oxindoles. Org Lett 2019; 21:6897-6902. [DOI: 10.1021/acs.orglett.9b02519] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jiawen Lang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yi Li
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Tengfei Kang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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77
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Pandit RP, Kim ST, Ryu DH. Asymmetric Synthesis of Enantioenriched 2‐Aryl‐2,3‐Dihydrobenzofurans by a Lewis Acid Catalyzed Cyclopropanation/Intramolecular Rearrangement Sequence. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906954] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Seung Tae Kim
- Department of ChemistrySungkyunkwan University 300, Cheoncheon, Jangan Suwon 16419 Korea
| | - Do Hyun Ryu
- Department of ChemistrySungkyunkwan University 300, Cheoncheon, Jangan Suwon 16419 Korea
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78
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Pandit RP, Kim ST, Ryu DH. Asymmetric Synthesis of Enantioenriched 2-Aryl-2,3-Dihydrobenzofurans by a Lewis Acid Catalyzed Cyclopropanation/Intramolecular Rearrangement Sequence. Angew Chem Int Ed Engl 2019; 58:13427-13432. [PMID: 31309680 DOI: 10.1002/anie.201906954] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Indexed: 12/14/2022]
Abstract
A cyclopropanation/intramolecular rearrangement initiated by the Michael addition of in situ generated ortho-quinone methides (o-QMs) has been developed for the enantioselective synthesis of 2-aryl-2,3-dihydrobenzofurans containing two consecutive stereogenic centers, including a quaternary carbon atom. In the presence of a chiral oxazaborolidinium ion catalyst, the reaction proceeded in excellent yields (up to 95 %) with excellent stereoselectivity (up to >99 ee, up to >20:1 d.r.).
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Affiliation(s)
- Rameshwar Prasad Pandit
- Department of Chemistry, Sungkyunkwan University, 300, Cheoncheon, Jangan, Suwon, 16419, Korea
| | - Seung Tae Kim
- Department of Chemistry, Sungkyunkwan University, 300, Cheoncheon, Jangan, Suwon, 16419, Korea
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University, 300, Cheoncheon, Jangan, Suwon, 16419, Korea
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79
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Mahto P, Rana NK, Shukla K, Das BG, Joshi H, Singh VK. Asymmetric Multifunctional Modular Organocatalysis: One-Pot Direct Strategy to Enantiopure α,β-Disubstituted γ-Butyrolactones. Org Lett 2019; 21:5962-5966. [PMID: 31322898 DOI: 10.1021/acs.orglett.9b02094] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A simple and efficient approach to enantioenriched α,β-disubstituted γ-butyrolactones has been developed through multifunctional modular organocatalysis in a highly enantioselective (>99% ee) and diastereoselective (>30:1) manner following a one-pot sequential Michael-hemiacetalization-oxidation reaction. The catalytic process has great substrate compatibility, and the products have been transformed to synthetically useful molecules. The methodology has also been applied to the formal synthesis of (+)-Pilocarpine.
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Affiliation(s)
- Pratibha Mahto
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur - 208 016 , UP , India
| | - Nirmal K Rana
- Department of Chemistry , Indian Institute of Technology Jodhpur , Jodhpur - 342 037 , Rajasthan , India
| | - Khyati Shukla
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur - 208 016 , UP , India
| | - Braja G Das
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur - 208 016 , UP , India
| | - Harshit Joshi
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur - 208 016 , UP , India
| | - Vinod K Singh
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur - 208 016 , UP , India
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80
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Enantioselective, Organocatalytic, Dissymmetric 1,4- and 1,2-Addition of Malononitrile to a Keto-bisenone Followed by an Oxa-Michael Addition Cascade. Org Lett 2019; 21:5793-5797. [PMID: 31298544 DOI: 10.1021/acs.orglett.9b01705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An unprecedented enantioselective dissymmetric 1,4- and 1,2-addition of malononitrile to a keto-bisenone followed by an oxa-Michael addition cascade to trap the in situ generated unstable tertiary alcohol have been developed. The quinine-derived amino-squaramide bifunctional organocatalyst worked efficiently and provides the oxa-spiro-[4,4]-nonanes in good yields and excellent diastereo- and enantioselectivities (up to 99:1 dr and 99% ee). Notably, a complete chemoselective addition of a methylene unit to an aliphatic-tethered enone over the aromatic-tethered enone was observed.
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81
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Grau BW, Bönisch S, Neuhauser A, Hampel F, Görling A, Tsogoeva SB. Facile Access to Challenging
ortho
‐Terphenyls via Merging Two Multi‐Step Domino Reactions in One‐Pot: A Joint Experimental/Theoretical Study. ChemCatChem 2019. [DOI: 10.1002/cctc.201900746] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Benedikt W. Grau
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Simon Bönisch
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstraße 3 91058 Erlangen Germany
| | - Alexander Neuhauser
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Frank Hampel
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Andreas Görling
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstraße 3 91058 Erlangen Germany
| | - Svetlana B. Tsogoeva
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
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82
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Kao HK, Lin XJ, Hong BC, Yang VW, Lee GH. Enantioselective Synthesis of Yohimbine Analogues by an Organocatalytic and Pot-Economic Strategy. J Org Chem 2019; 84:12138-12147. [PMID: 31291725 DOI: 10.1021/acs.joc.9b01193] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An efficient and one-pot method has been developed for the enantioselective synthesis of pentacyclic indole derivatives with the yohimbane skeleton via a sequence of asymmetric Michael-Michael-Mannich-reduction-amidation-Bischler-Napieralski-reduction reactions with a high diastereoselectivity and high enantioselectivities (up to >99% ee). The seven-step reaction sequence, which generates five bonds and five stereocenters, can be conducted with a pot-economic synthetic strategy and one-pot operation in good yields. The structure and absolute stereochemistry of two products were confirmed by X-ray crystallography analysis.
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Affiliation(s)
- Hsin-Kai Kao
- Department of Chemistry and Biochemistry , National Chung Cheng University , Chia-Yi 621 , Taiwan, R.O.C
| | - Xin-Jie Lin
- Department of Chemistry and Biochemistry , National Chung Cheng University , Chia-Yi 621 , Taiwan, R.O.C
| | - Bor-Cherng Hong
- Department of Chemistry and Biochemistry , National Chung Cheng University , Chia-Yi 621 , Taiwan, R.O.C
| | - Van-Wei Yang
- Department of Chemistry and Biochemistry , National Chung Cheng University , Chia-Yi 621 , Taiwan, R.O.C
| | - Gene-Hsiang Lee
- Instrumentation Center , National Taiwan University , Taipei 106 , Taiwan, R.O.C
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83
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Metal-Free Air Oxidation in a Convenient Cascade Approach for the Access to Isoquinoline-1,3,4( 2H)-triones. Molecules 2019; 24:molecules24112177. [PMID: 31185639 PMCID: PMC6600517 DOI: 10.3390/molecules24112177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/06/2019] [Accepted: 06/07/2019] [Indexed: 11/24/2022] Open
Abstract
Herein we describe a very useful application of the readily available trifunctional aromatic ketone methyl-2-(2-bromoacetyl)benzoate in reactions with primary amines. An unexpected in situ air oxidation that follows a cascade process allowed the access to a series of isoquinoline-1,3,4(2H)-triones, a class of heterocyclic compounds of great interest containing an oxygen-rich heterocyclic scaffold. A modification of the original protocol, utilizing a Staudinger reaction in the presence of trimethylphosphine, was necessary for the synthesis of Caspase inhibitor trione with free NH group.
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84
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Jakkampudi S, Parella R, Arman HD, Zhao JCG. Diastereodivergent Synthesis of Hexahydro-6H-benzo[c]chromen-6-one Derivatives Catalyzed by Modularly Designed Organocatalysts. Chemistry 2019; 25:7515-7520. [PMID: 30895663 PMCID: PMC6548622 DOI: 10.1002/chem.201806447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Indexed: 11/09/2022]
Abstract
The diastereodivergent synthesis of hexahydro-6H-benzo[c]chromen-6-one derivatives with good to high diastereoselectivities (up to 98:2 d.r.) and enantioselectivities (up to >99 % ee) has been achieved by using a domino Michael/Michael/hemiacetalization reaction between trans-2-hydroxy-β-nitrostyrenes and trans-7-oxo-5-heptenals followed by oxidation. With use of appropriate modularly designed organocatalysts (MDOs) that are self-assembled in situ from amino acid derivatives and cinchona alkaloid derivatives, two different diastereomers of the desired hexahydro-6H-benzo[c]chromen-6-ones are obtained from the same substrates.
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Affiliation(s)
- Satish Jakkampudi
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas, 78249-0698, USA
| | - Ramarao Parella
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas, 78249-0698, USA
| | - Hadi D Arman
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas, 78249-0698, USA
| | - John C-G Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas, 78249-0698, USA
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85
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Hajra S, Abu Saleh SK, Hazra A, Singh MS. Organocatalytic Domino Reaction of Spiroaziridine Oxindoles and Malononitrile for the Enantiopure Synthesis of Spiro[dihydropyrrole-3,3′-oxindoles]. J Org Chem 2019; 84:8194-8201. [DOI: 10.1021/acs.joc.9b01226] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Saumen Hajra
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India
| | - SK Abu Saleh
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Atanu Hazra
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Maya Shankar Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
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86
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Di Mola A, Macchia A, Tedesco C, Pierri G, Palombi L, Filosa R, Massa A. Synthetic Strategies and Cascade Reactions of 2‐Cyanobenzophenones for the Access to Diverse 3,3‐Disubstituted Isoindolinones and 3‐Aryl‐3‐Hydroxyisoindolinones. ChemistrySelect 2019. [DOI: 10.1002/slct.201901045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Antonia Di Mola
- Dipartimento di Chimica e Biologia “A. Zambelli”Università degli studi di Salerno Via Giovanni Paolo II 84084- Fisciano (SA) Italy
| | - Antonio Macchia
- Dipartimento di Chimica e Biologia “A. Zambelli”Università degli studi di Salerno Via Giovanni Paolo II 84084- Fisciano (SA) Italy
| | - Consiglia Tedesco
- Dipartimento di Chimica e Biologia “A. Zambelli”Università degli studi di Salerno Via Giovanni Paolo II 84084- Fisciano (SA) Italy
| | - Giovanni Pierri
- Dipartimento di Chimica e Biologia “A. Zambelli”Università degli studi di Salerno Via Giovanni Paolo II 84084- Fisciano (SA) Italy
| | - Laura Palombi
- Dipartimento di Chimica e Biologia “A. Zambelli”Università degli studi di Salerno Via Giovanni Paolo II 84084- Fisciano (SA) Italy
| | - Rosanna Filosa
- Consorzio Interuniversitario Sannio Tech. P.zza San G. Moscati 8, SS Appia km 256 Apollosa (BN) Italy
| | - Antonio Massa
- Dipartimento di Chimica e Biologia “A. Zambelli”Università degli studi di Salerno Via Giovanni Paolo II 84084- Fisciano (SA) Italy
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87
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Tao BK, Yang H, Hua YZ, Wang MC. Dinuclear zinc synergistic catalytic asymmetric phospha-Michael/Michael cascade reaction: synthesis of 1,2,3-trisubstituted indanes bearing phosphoryl groups. Org Biomol Chem 2019; 17:4301-4310. [PMID: 30969299 DOI: 10.1039/c9ob00544g] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A new dinuclear zinc synergistic catalytic asymmetric phospha-Michael/Michael cascade reaction of o-dienones and dialkyl phosphates is reported. This method has been proven to be general and efficient for the formation of a range of chiral 1,2,3-trisubstituted indane compounds containing phosphorus groups in good yields (up to 92%) with excellent stereoselectivities (up to >99% ee and up to >99 : 1 dr). The relative configuration of the product was identified as having a trans,trans substitution pattern via two-dimensional (2D) nuclear Overhauser effect spectroscopy 1H-1H NMR experiments. A possible mechanism was proposed.
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Affiliation(s)
- Bing-Kai Tao
- College of Chemistry and Molecular Engineering, School of Pharmaceutical Sciences, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan province 450000, P. R. China.
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88
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Mukhopadhyay S, Pan SC. Organocatalytic Asymmetric Mannich Reaction of Dihydro-3-carboalkoxy-2-quinolones with PreformedN-Boc Imines. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900156] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Subhas Chandra Pan
- Department of Chemistry; Indian Institute of Technology Guwahati; Assam 781039 India
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89
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Pellissier H. Syntheses of Natural and Biologically Relevant Products through Asymmetric Metal-Catalyzed Domino Reactions. A Review. ORG PREP PROCED INT 2019. [DOI: 10.1080/00304948.2019.1590681] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Hélène Pellissier
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
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90
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Synthesis and Organocatalytic Asymmetric Nitro-aldol Initiated Cascade Reactions of 2-Acylbenzonitriles Leading to 3,3-Disubstituted Isoindolinones. Catalysts 2019. [DOI: 10.3390/catal9040327] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
In this work, we investigated two strategies for the synthesis of the challenging ketones 2-acylbenzonitriles and we report their use as electrophiles in asymmetric organocatalytic cascade reactions with nitromethane. Promising results were obtained in the presence of chiral bifunctional ammonium salts under phase transfer conditions, which led to novel 3,3-disubstituted isoindolinones in quantitative yields and moderate enantioselectivity.
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91
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Chen P, Chen Z, Li Y, Ouyang Q, Du W, Chen Y. Auto‐Tandem Cooperative Catalysis Using Phosphine/Palladium: Reaction of Morita–Baylis–Hillman Carbonates and Allylic Alcohols. Angew Chem Int Ed Engl 2019; 58:4036-4040. [DOI: 10.1002/anie.201814403] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Peng Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Zhi‐Chao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Yue Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Qin Ouyang
- College of PharmacyThird Military Medical University Chongqing 400038 China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Ying‐Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
- College of PharmacyThird Military Medical University Chongqing 400038 China
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92
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Heravi MM, Zadsirjan V, Heydari M, Masoumi B. Organocatalyzed Asymmetric Friedel‐Crafts Reactions: An Update. CHEM REC 2019. [DOI: 10.1002/tcr.201800190] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Majid M. Heravi
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak Tehran Iran Tel.: +98 21 88044051 fax: +98 21 88041344
| | - Vahideh Zadsirjan
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak Tehran Iran Tel.: +98 21 88044051 fax: +98 21 88041344
| | - Masumeh Heydari
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak Tehran Iran Tel.: +98 21 88044051 fax: +98 21 88041344
| | - Baharak Masoumi
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak Tehran Iran Tel.: +98 21 88044051 fax: +98 21 88041344
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93
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Liu MM, Yang XC, Hua YZ, Chang JB, Wang MC. Synthesis of Chiral Bispirotetrahydrofuran Oxindoles by Cooperative Bimetallic-Catalyzed Asymmetric Cascade Reaction. Org Lett 2019; 21:2111-2115. [DOI: 10.1021/acs.orglett.9b00386] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Meng-Meng Liu
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Xiao-Chao Yang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Yuan-Zhao Hua
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Jun-Biao Chang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Min-Can Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
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94
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Chen P, Chen Z, Li Y, Ouyang Q, Du W, Chen Y. Auto‐Tandem Cooperative Catalysis Using Phosphine/Palladium: Reaction of Morita–Baylis–Hillman Carbonates and Allylic Alcohols. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814403] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Peng Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Zhi‐Chao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Yue Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Qin Ouyang
- College of PharmacyThird Military Medical University Chongqing 400038 China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Ying‐Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
- College of PharmacyThird Military Medical University Chongqing 400038 China
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95
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Chaudhari P, Hong BC, Wen CL, Lee GH. Asymmetric Synthesis of Spirocyclopentane Oxindoles Containing Four Consecutive Stereocenters and Quaternary α-Nitro Esters via Organocatalytic Enantioselective Michael-Michael Cascade Reactions. ACS OMEGA 2019; 4:655-667. [PMID: 31459355 PMCID: PMC6648780 DOI: 10.1021/acsomega.8b03049] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 12/24/2018] [Indexed: 06/10/2023]
Abstract
An enantioselective domino Michael-Michael reaction of nitroolefins and 2-nitro-3-arylacrylates has been established, which provided a series of spirocyclopentane oxindoles with four consecutive stereocenters including quaternary α-nitro esters with good yields (up to 73%) and excellent enantioselectivities (up to 97% ee). The reaction was realized and optimized with the aid of a chiral squaramide-amine catalyst. The structures of 11 products were confirmed by single-crystal X-ray diffraction analysis.
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Affiliation(s)
- Prakash
D. Chaudhari
- Department
of Chemistry and Biochemistry, National
Chung Cheng University, Chia-Yi 621, Taiwan, ROC
| | - Bor-Cherng Hong
- Department
of Chemistry and Biochemistry, National
Chung Cheng University, Chia-Yi 621, Taiwan, ROC
| | - Chao-Lin Wen
- Department
of Chemistry and Biochemistry, National
Chung Cheng University, Chia-Yi 621, Taiwan, ROC
| | - Gene-Hsiang Lee
- Instrumentation
Center, National Taiwan University, Taipei 106, Taiwan, ROC
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96
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Yadav A, Srivastava A, Mobin SM, Samanta S. L-Proline-Catalyzed One-Pot Diastereoselective Synthesis of Cyclohexanols from β-Aryl-γ-nitroketones and α,β-Unsaturated Aldehydes: A New Route to 2,3,4,6-Tetrasubstituted Phenols. ChemistrySelect 2019. [DOI: 10.1002/slct.201803521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Anubha Yadav
- Discipline of Chemistry; Indian Institute of Technology Indore Simrol, Indore; 453552 Madhya Pradesh India
| | - Anvita Srivastava
- Nanhi Pari Seemant Engineering Institute Pithoragarh; Uttarakhand 262501 India
| | - Shaikh M. Mobin
- Discipline of Chemistry; Indian Institute of Technology Indore Simrol, Indore; 453552 Madhya Pradesh India
| | - Sampak Samanta
- Discipline of Chemistry; Indian Institute of Technology Indore Simrol, Indore; 453552 Madhya Pradesh India
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97
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Zhao JQ, Yang L, Zhou XJ, You Y, Wang ZH, Zhou MQ, Zhang XM, Xu XY, Yuan WC. Organocatalyzed Dearomative Cycloaddition of 2-Nitrobenzofurans and Isatin-Derived Morita–Baylis–Hillman Carbonates: Highly Stereoselective Construction of Cyclopenta[b]benzofuran Scaffolds. Org Lett 2019; 21:660-664. [DOI: 10.1021/acs.orglett.8b03786] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jian-Qiang Zhao
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Lei Yang
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Jian Zhou
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong You
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Zhen-Hua Wang
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Ming-Qiang Zhou
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Xiao-Mei Zhang
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Xiao-Ying Xu
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Wei-Cheng Yuan
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
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98
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Parella R, Jakkampudi S, Arman H, Zhao JCG. Stereoselective Synthesis of 3-Oxabicyclo[3.3.1]nonan-2-ones via a Domino Reaction Catalyzed by Modularly Designed Organocatalysts. Adv Synth Catal 2019; 361:208-213. [PMID: 31467501 PMCID: PMC6715131 DOI: 10.1002/adsc.201800987] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Indexed: 01/29/2023]
Abstract
A highly stereoselective method for the synthesis of functionalized 3-oxabicyclo[3.3.1]nonan-2-one derivatives with four contiguous stereogenic centers, including one tetrasubstituted stereogenic center, was realized through an organocatalytic domino Michael-hemiacetalization-Michael reaction of (E)-3-aryl-2-nitroprop-2-enols and (E)-7-aryl-7-oxohept-5-enals followed by a PCC oxidation. Using the modularly designed organocatalysts (MDOs) self-assembled from cinchona alkaloid derivatives and amino acids in the reaction media, the title products were obtained in good yields (up to 84%), excellent diastereoselectivities (> 99:1 dr), and high enantioselectivities (up to 96% ee).
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Affiliation(s)
- Ramarao Parella
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA, Fax: (+1)-210-458-7428; phone: (+1)-210-458-5432
| | - Satish Jakkampudi
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA, Fax: (+1)-210-458-7428; phone: (+1)-210-458-5432
| | - Hadi Arman
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA, Fax: (+1)-210-458-7428; phone: (+1)-210-458-5432
| | - John C.-G. Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA, Fax: (+1)-210-458-7428; phone: (+1)-210-458-5432
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99
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Shukla K, Shah S, Rana NK, Singh VK. An efficient and highly diastereoselective synthesis of carbocyclic spiropyrazolones via one-pot sequential dual organo-silver catalyzed Michael-hydroalkylation reactions. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2018.11.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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100
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Balha M, Mondal B, Pan SC. Organocatalytic asymmetric synthesis of dihydrofuran-spirooxindoles from benzylidene malononitriles and dioxindoles. Org Biomol Chem 2019; 17:6557-6561. [DOI: 10.1039/c9ob01199d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first organocatalytic asymmetric synthesis of dihydrofuran-spirooxindoles having a linkage at the 2-position of the dihydrofuran motif has been developed from dioxindoles and benzylidene malononitriles.
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Affiliation(s)
- Megha Balha
- Department of Chemistry
- Indian Institute of Technology
- Guwahati
- India
| | - Buddhadeb Mondal
- Department of Chemistry
- Indian Institute of Technology
- Guwahati
- India
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