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Rao VUB, Wang C, Demarque DP, Grassin C, Otte F, Merten C, Strohmann C, Loh CCJ. A synergistic Rh(I)/organoboron-catalysed site-selective carbohydrate functionalization that involves multiple stereocontrol. Nat Chem 2023; 15:424-435. [PMID: 36585443 PMCID: PMC9986112 DOI: 10.1038/s41557-022-01110-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Accepted: 11/16/2022] [Indexed: 12/31/2022]
Abstract
Site-selective functionalization is a core synthetic strategy that has broad implications in organic synthesis. Particularly, exploiting chiral catalysis to control site selectivity in complex carbohydrate functionalizations has emerged as a leading method to unravel unprecedented routes into biologically relevant glycosides. However, robust catalytic systems available to overcome multiple facets of stereoselectivity challenges to this end still remain scarce. Here we report a synergistic chiral Rh(I)- and organoboron-catalysed protocol, which enables access into synthetically challenging but biologically relevant arylnaphthalene glycosides. Our method depicts the employment of chiral Rh(I) catalysis in site-selective carbohydrate functionalization and showcases the utility of boronic acid as a compatible co-catalyst. Crucial to the success of our method is the judicious choice of a suitable organoboron catalyst. We also determine that exquisite multiple aspects of stereocontrol, including enantio-, diastereo-, regio- and anomeric control and dynamic kinetic resolution, are concomitantly operative.
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Affiliation(s)
- V U Bhaskara Rao
- Abteilung Chemische Biologie, Max Planck Institut für Molekulare Physiologie, Dortmund, Germany.,Fakültät für Chemie und Chemische Biologie, Technische Universität Dortmund, Dortmund, Germany
| | - Caiming Wang
- Abteilung Chemische Biologie, Max Planck Institut für Molekulare Physiologie, Dortmund, Germany.,Fakültät für Chemie und Chemische Biologie, Technische Universität Dortmund, Dortmund, Germany
| | | | | | - Felix Otte
- Department of Inorganic Chemistry, Technische Universität Dortmund, Dortmund, Germany
| | | | - Carsten Strohmann
- Department of Inorganic Chemistry, Technische Universität Dortmund, Dortmund, Germany
| | - Charles C J Loh
- Abteilung Chemische Biologie, Max Planck Institut für Molekulare Physiologie, Dortmund, Germany. .,Fakültät für Chemie und Chemische Biologie, Technische Universität Dortmund, Dortmund, Germany.
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2
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Pounder A, Tam W, Chen LD. The Mechanism and Origin of Enantioselectivity in the Rhodium-Catalyzed Asymmetric Ring-Opening Reactions of Oxabicyclic Alkenes with Organoboronic Acids: A DFT Investigation. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Austin Pounder
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - William Tam
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Leanne D. Chen
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
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3
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Shilpa T, Dhanya R, Saranya S, Anilkumar G. An Overview of Rhodium‐Catalysed Multi‐Component Reactions. ChemistrySelect 2020. [DOI: 10.1002/slct.201904441] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Thomas Shilpa
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam Kerala INDIA 686560
| | - Raju Dhanya
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam Kerala INDIA 686560
| | - Salim Saranya
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam Kerala INDIA 686560
| | - Gopinathan Anilkumar
- School of Chemical Sciences Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam Kerala INDIA 686560
- Advanced Molecular Materials Research Centre (AMMRC), Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam Kerala INDIA 686560
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Kumbhar NM, Gopal JS. Structural significance of hypermodified nucleoside 5-carboxymethylaminomethyluridine (cmnm 5U) from 'wobble' (34th) position of mitochondrial tRNAs: Molecular modeling and Markov state model studies. J Mol Graph Model 2018; 86:66-83. [PMID: 30336453 DOI: 10.1016/j.jmgm.2018.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 10/02/2018] [Accepted: 10/04/2018] [Indexed: 11/28/2022]
Abstract
A quantum chemical semi-empirical RM1 approach was used to deduce the structural role of hypermodified nucleoside 5-carboxymethylaminomethyluridine 5'-monophosphate (pcmnm5U) from 'wobble' (34th) position of mitochondrial tRNAs. The energetically preferred pcmnm5U(34) adopted a 'skew' conformation for C5-substituted side chain (-CH2-NH2+-CH2-COO-) moiety that orient towards the 5'-ribose-phosphate backbone, which support 'anti' orientation of glycosyl (χ34) torsion angle. Preferred conformation of pcmnm5U(34) was stabilized by O(4) … HC(10), O1P⋯HN(11), O(15) … HN(11), O(15) … HC(10), O4' … HC(6) and O(2) … HC2' hydrogen bonding interactions. The high flexibility of side chain moiety displayed different structural properties for pcmnm5U(34). Three different conformations of pcmnm5U(34) were observed in molecular dynamics simulations and Markov state model studies. The unmodified uracil revealed 'syn' and 'anti' orientations for glycosyl (χ34) torsion angle that substantiate the role of "-CH2-NH2+-CH2-COO-" moiety in maintaining the 'anti' orientation of pcmnm5U(34). The preferred conformation of pcmnm5U(34) helps to recognize Guanosine more proficiently than Adenosine from the third position of codons. The role of pcmnm5U(34) in tRNA biogenesis paves the way to understand its structural significance in usual mitochondrial metabolism and respiration.
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Affiliation(s)
- Navanath M Kumbhar
- Garware Research Centre, Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Pune, 411007, India.
| | - Janhavi S Gopal
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University (Formerly University of Pune), Pune, 411007, India
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Wu H, Zhao T, Hu X. Friedel-Crafts Reaction of N,N-Dimethylaniline with Alkenes Catalyzed by Cyclic Diaminocarbene-Gold(I) Complex. Sci Rep 2018; 8:11449. [PMID: 30061755 PMCID: PMC6065310 DOI: 10.1038/s41598-018-29854-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/18/2018] [Indexed: 12/22/2022] Open
Abstract
In general, Friedel-Crafts reaction is incompatible with amines due to the Lewis acidity of the catalysts. Recently, we reported that cyclic diaminocarbene-Gold(I) can be used as catalyst for the Friedel-Crafts alkylation between aromatic amines and alkenes. Herein, a systematically theoretical research was performed on this rare Friedel-Crafts reaction. The adopted calculation method is accurate enough to reproduce the crystal structure of the catalyst. It was found that the reactions followed the electrophilic aromatic substitution mechanism. The gold cation can activate the C=C double bond and generate the electrophilic group which can be attacked by the aromatic ring. The para-product is more energy favorable which agrees well with the experimental results. The reaction of α-methylstyrene follows the Markovnikov rule, and the activation energy to generate the branched product of methylstyrene is lower than that producing the linear product. However, the reaction of butanone follows the anti-Markovnikov rule, and the activation energy to generate the branched product of butanone is higher than that producing the linear product. These calculation results reveal the mechanism of this new Friedel-Crafts reaction. It can well explain the high para-selectivity and the substrate-dependent of the product structures in the experiment.
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Affiliation(s)
- Hangzhi Wu
- High School Affiliated to Nanjing Normal University, Nanjing, P. R. China
| | - Tianxiang Zhao
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Xingbang Hu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China.
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6
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Mechanism and Diastereoselectivity of [3+3] Cycloaddition between Enol Diazoacetate and Azomethine Imine Catalyzed by Dirhodium Tetracarboxylate: A Theoretical Study. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800261] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Lin S, Xu C, Peng D, Peng L, Yang D, Long Y, Chang Y, Gu FL. Study on the mechanism of platinum(ii)-catalyzed asymmetric ring-opening addition of oxabicyclic alkenes with arylboronic acids. Phys Chem Chem Phys 2018; 20:14105-14116. [PMID: 29748667 DOI: 10.1039/c8cp01682h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism of an asymmetric ring-opening (ARO) addition of oxabicyclic alkenes catalyzed by a platinum(ii) catalyst was investigated by M06-2X/6-311G(d,p) using density functional theory (DFT). All the structures were optimized in the solvent model density (SMD) solvation model (solvation = the mixture of H2O/CH2Cl2 1 : 10, v/v) for consistence with experimental conditions. The overall mechanism is considered as a four-step reaction including transmetalation, carboplatinum, β-oxygen elimination, and hydrolysis. The transmetalation and carboplatinum steps are multi-step processes, and both the regioselectivity and the enantioselectivity lie in the carboplatinum process. Based on the natural population analysis (NPA) and the orbital composition analysis of oxabicyclic alkenes, the preferable coordination site with a platinum(ii) center is considered as the bridging oxygen atom by exo-coordination because of the less steric hindrance and the stronger electronic effect. This coordination is thought of as origin of the regioselectivity and the enantioselectivity, which is different from that proposed previously. The Gibbs free energy profiles show that the rate-determining step involves the migration of an aryl group from the platinum(ii) center to one of the closer enantiotopic carbon atoms in an alkene of the oxabicyclic alkenes. The theoretically predicted enantiomeric excess (ee) value of 82% for this reaction is very close to the experimental ee value of 80%. It was found that the hydrogen bonds between the oxabicyclic alkenes and water molecules promotes the platinum(ii) catalyst leaving the reaction system effortlessly and entering the next catalysis recycle. In the overall catalytic cycle, the highest free energy barrier is 30.1 kcal mol-1 and the process releases an energy of 26.3 kcal mol-1. The results confirm that the Pt(ii)-catalyzed ARO reactions take place at mild experimental conditions, which is consistent with the experiment observations. Thus, this study is important for understanding the catalytic behavior of the transition metal platinum(ii) in an asymmetric ring-opening reaction.
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Affiliation(s)
- Sipeng Lin
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry & Environment, South China Normal University, Guangzhou 510006, China.
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Ni SF, Zhang P, Chu CQ, Qin P, Dang L. Computational Studies on the Mechanism of Rh-Catalyzed Decarbonylative [5+2-1] Reaction between Isatins and Alkynes: High Selectivity by Directing Group. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701475] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Shao-Fei Ni
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province; Shantou University; 515063 Guangdong P. R. China
| | - Pan Zhang
- Department of Chemistry in; Southern University of Science and Technology; 518055 Shenzhen P. R. China
| | - Chang-qing Chu
- Department of Chemistry in; Southern University of Science and Technology; 518055 Shenzhen P. R. China
| | - Peng Qin
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province; Shantou University; 515063 Guangdong P. R. China
| | - Li Dang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province; Shantou University; 515063 Guangdong P. R. China
- Department of Chemistry in; Southern University of Science and Technology; 518055 Shenzhen P. R. China
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9
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Yen A, Choo KL, Yazdi SK, Franke PT, Webster R, Franzoni I, Loh CCJ, Poblador-Bahamonde AI, Lautens M. Rhodium-Catalyzed Enantioselective Isomerization of meso
-Oxabenzonorbornadienes to 1,2-Naphthalene Oxides. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700632] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Andy Yen
- Department of Chemistry; Davenport Chemical Laboratories; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Ken-Loon Choo
- Department of Chemistry; Davenport Chemical Laboratories; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Shabnam K. Yazdi
- Department of Chemistry; Davenport Chemical Laboratories; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | | | - Robert Webster
- Bayer Pharma Aktiengesellschaft; Aprather Web 18a 42113 Wuppertal Germany
| | - Ivan Franzoni
- Department of Chemistry; Davenport Chemical Laboratories; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Charles C. J. Loh
- Technische Universität Dortmund; Otto-Hahn-Straße 4a 44227 Dortmund Germany
| | | | - Mark Lautens
- Department of Chemistry; Davenport Chemical Laboratories; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
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10
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Yen A, Choo KL, Yazdi SK, Franke PT, Webster R, Franzoni I, Loh CCJ, Poblador-Bahamonde AI, Lautens M. Rhodium-Catalyzed Enantioselective Isomerization of meso
-Oxabenzonorbornadienes to 1,2-Naphthalene Oxides. Angew Chem Int Ed Engl 2017; 56:6307-6311. [DOI: 10.1002/anie.201700632] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Andy Yen
- Department of Chemistry; Davenport Chemical Laboratories; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Ken-Loon Choo
- Department of Chemistry; Davenport Chemical Laboratories; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Shabnam K. Yazdi
- Department of Chemistry; Davenport Chemical Laboratories; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | | | - Robert Webster
- Bayer Pharma Aktiengesellschaft; Aprather Web 18a 42113 Wuppertal Germany
| | - Ivan Franzoni
- Department of Chemistry; Davenport Chemical Laboratories; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Charles C. J. Loh
- Technische Universität Dortmund; Otto-Hahn-Straße 4a 44227 Dortmund Germany
| | | | - Mark Lautens
- Department of Chemistry; Davenport Chemical Laboratories; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
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