1
|
André RF, Palazzolo A, Poucin C, Ribot F, Carenco S. Phosphine-Catalyzed Activation of Phenylsilane for Benzaldehyde Reduction. Chempluschem 2023; 88:e202300038. [PMID: 36861404 DOI: 10.1002/cplu.202300038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/03/2023]
Abstract
Hydrosilylation reactions are commonly used for the reduction of carbonyl bonds in fine chemistry, catalyzed by transition metal complexes. The current challenge is to expand the scope of metal-free alternative catalysts, including in particular organocatalysts. This work describes the organocatalyzed hydrosilylation of benzaldehyde with a phosphine, introduced at 10 mol%, and phenylsilane at room temperature. The activation of phenylsilane was highly dependent on the physical properties of the solvent such as the polarity, and the highest conversions were obtained in acetonitrile and propylene carbonate with yields of 46 % and 97 %, respectively. The best results of the screening over 13 phosphines and phosphites were obtained with linear trialkylphoshines (PMe3 , Pn Bu3 , POct3 ), indicating the importance of their nucleophilicity, with yields of 88 %, 46 % and 56 %, respectively. With the help of heteronuclear 1 H-29 Si NMR spectroscopy, the products of the hydrosilylation (PhSiH3-n (OBn)n ) were identified, allowing a monitoring of the concentration in the different species, and thereby of their reactivity. The reaction displayed an induction period of ca. 60 min, followed by the sequential hydrosilylations presenting various reaction rates. In agreement with the formation of partial charges in the intermediate state, we propose a mechanism based on a hypervalent silicon center via the Lewis base activation of the silicon Lewis acid.
Collapse
Affiliation(s)
- Rémi F André
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), 4 place Jussieu, 75005, Paris, France
| | - Alberto Palazzolo
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), 4 place Jussieu, 75005, Paris, France
| | - Cyprien Poucin
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), 4 place Jussieu, 75005, Paris, France
| | - François Ribot
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), 4 place Jussieu, 75005, Paris, France
| | - Sophie Carenco
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), 4 place Jussieu, 75005, Paris, France
| |
Collapse
|
2
|
Affiliation(s)
| | - Brian R. James
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| |
Collapse
|
3
|
An F, Jangra H, Wei Y, Shi M, Zipse H, Ofial AR. Reactivities of allenic and olefinic Michael acceptors towards phosphines. Chem Commun (Camb) 2022; 58:3358-3361. [PMID: 35188503 DOI: 10.1039/d1cc06786a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The kinetics of the reactions of tributylphosphine with allenic and olefinic Michael acceptors in dichloromethane at 20 °C was followed by photometric and NMR spectroscopic methods. Combination with DFT-calculated methyl anion affinities revealed the relevance of retroaddition barriers in phosphine-catalysed reactions when mixtures of allenic and olefinic substrates are used.
Collapse
Affiliation(s)
- Feng An
- Department Chemie, Ludwig-Maximilians-Universtität München, Butenandtstr. 5-13, München 81377, Germany.
| | - Harish Jangra
- Department Chemie, Ludwig-Maximilians-Universtität München, Butenandtstr. 5-13, München 81377, Germany.
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, P. R. China.
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, P. R. China. .,Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 MeiLong Road, Shanghai 200237, P. R. China
| | - Hendrik Zipse
- Department Chemie, Ludwig-Maximilians-Universtität München, Butenandtstr. 5-13, München 81377, Germany.
| | - Armin R Ofial
- Department Chemie, Ludwig-Maximilians-Universtität München, Butenandtstr. 5-13, München 81377, Germany.
| |
Collapse
|
4
|
Shibuya M, Matsuda M, Yamamoto Y. 1,2-Carbopentafluorophenylation of Alkynes: The Metallomimetic Pull-Push Reactivity of Tris(pentafluorophenyl)borane. Chemistry 2021; 27:8822-8831. [PMID: 33860597 DOI: 10.1002/chem.202101090] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Indexed: 12/26/2022]
Abstract
We report the novel single-step 1,2-dicarbofunctionalization of an arylacetylene with an allylsilane and tris(pentafluorophenyl)borane [B(C6 F5 )3 ] involving C-C bond formation with C-H bond scission at the β-position to the silicon atom of an allylsilane and B→C migration of a C6 F5 group. The 1,2-carbopentafluorophenylation occurs smoothly without the requirement for a catalyst or heating. Mechanistic studies suggest that the metallomimetic "pull-push" reactivity of B(C6 F5 )3 imparts consecutive electrophilic and nucleophilic characteristics to the benzylic carbon of the arylacetylene. Subsequent photochemical 6π-electrocyclization affords tetrafluoronaphthalenes, which are important in the pharmaceutical and materials sciences. Owing to the unique reactivity of B(C6 F5 )3 , the 1,2-carbopentafluorophenylation using 2-substituted furan proceeded with ring opening, and the reaction using silyl enolates formed a C-C bond with C-O bond scission at the silyloxy-substituted carbon.
Collapse
Affiliation(s)
- Masatoshi Shibuya
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Miki Matsuda
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| |
Collapse
|
5
|
Lecroq W, Schleinitz J, Billoue M, Perfetto A, Gaumont AC, Lalevée J, Ciofini I, Grimaud L, Lakhdar S. Metal-Free Deoxygenation of Amine N-Oxides: Synthetic and Mechanistic Studies. Chemphyschem 2021; 22:1237-1242. [PMID: 33971075 DOI: 10.1002/cphc.202100108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 04/20/2021] [Indexed: 12/14/2022]
Abstract
We report herein an unprecedented combination of light and P(III)/P(V) redox cycling for the efficient deoxygenation of aromatic amine N-oxides. Moreover, we discovered that a large variety of aliphatic amine N-oxides can easily be deoxygenated by using only phenylsilane. These practically simple approaches proceed well under metal-free conditions, tolerate many functionalities and are highly chemoselective. Combined experimental and computational studies enabled a deep understanding of factors controlling the reactivity of both aromatic and aliphatic amine N-oxides.
Collapse
Affiliation(s)
- William Lecroq
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6, Boulevard Maréchal Juin, Caen, 14000, France
| | - Jules Schleinitz
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Mallaury Billoue
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6, Boulevard Maréchal Juin, Caen, 14000, France
| | - Anna Perfetto
- Institute of Chemistry for Life and Health Sciences (i-CLeHS) Chimie ParisTech, PSL University, CNRS, 11 rue P. et M. Curie, 75005, Paris, France
| | - Annie-Claude Gaumont
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6, Boulevard Maréchal Juin, Caen, 14000, France
| | - Jacques Lalevée
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, 68100, Mulhouse, France
| | - Ilaria Ciofini
- Institute of Chemistry for Life and Health Sciences (i-CLeHS) Chimie ParisTech, PSL University, CNRS, 11 rue P. et M. Curie, 75005, Paris, France
| | - Laurence Grimaud
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Sami Lakhdar
- Université Paul Sabatier, Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA, UMR 5069), 118 Route de Narbonne, 31062, Toulouse Cedex 09, France
| |
Collapse
|
6
|
Li CJ, Ung SPM, Mechrouk VA. Shining Light on the Light-Bearing Element: A Brief Review of Photomediated C–H Phosphorylation Reactions. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1705978] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AbstractOrganophosphorus compounds have numerous useful applications, from versatile ligands and nucleophiles in the case of trivalent organophosphorus species to therapeutics, agrochemicals and material additives for pentavalent species. Although phosphorus chemistry is a fairly mature field, the construction of C–P(V) bonds relies heavily on either prefunctionalized substrates such as alkyl or aryl halides, or requires previously oxidized bonds such as C=N or C=O, leading to potential sustainability issues when looking at the overall synthetic route. In light of the recent advances in photochemistry, using photons as a reagent can provide better alternatives for phosphorylations by unlocking radical mechanisms and providing interesting redox pathways. This review will showcase the different photomediated phosphorylation procedures available for converting C–H bonds into C–P(V) bonds.1 Introduction1.1 Organophosphorus Compounds1.2 Phosphorylation: Construction of C–P(V) Bonds1.3 Photochemistry as an Alternative to Classical Phosphorylations2 Ionic Mechanisms Involving Nucleophilic Additions3 Mechanisms Involving Radical Intermediates3.1 Mechanisms Involving Reactive Carbon Radicals3.2 Mechanisms Involving Phosphorus Radicals3.2.1 Photoredox: Direct Creation of Phosphorus Radicals3.2.2 Photoredox: Indirect Creation of Phosphorus Radicals3.2.3 Dual Catalysis3.3 Photolytic Cleavage4 Conclusion and Outlook
Collapse
|
7
|
Schaffarczyk McHale KS, Haines RS, Harper JB. Investigating Variation of the Pnicogen Nucleophilic Heteroatom on Ionic Liquid Solvent Effects in Bimolecular Nucleophilic Substitution Processes. Chempluschem 2020; 84:534-539. [PMID: 31943899 DOI: 10.1002/cplu.201900188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/03/2019] [Indexed: 01/22/2023]
Abstract
A series of nucleophiles containing Group 15 nucleophilic heteroatoms has been used to expand and develop the current understanding of ionic liquid solvent effects on bimolecular nucleophilic substitution processes. It was found that when using arsenic-, antimony- and bismuth-based nucleophiles, rate constant enhancement was observed for all solvent compositions containing ionic liquids. This rate constant enhancement was driven by ionic liquid/transition state interactions, which contrasts with previous studies on earlier Group 15 nucleophiles. This study provides a holistic understanding and augments the predictive framework for the effects of ionic liquids on bimolecular nucleophilic substitution processes, with the potential for these periodic trends to be broadly applied.
Collapse
Affiliation(s)
| | - Ronald S Haines
- School of Chemistry, University of New South Wales, UNSW Sydney, NSW 2052, Australia
| | - Jason B Harper
- School of Chemistry, University of New South Wales, UNSW Sydney, NSW 2052, Australia
| |
Collapse
|
8
|
Dong J, Liu B, Ding H, Shi J, Liu N, Dai B, Kim I. Bio-based healable non-isocyanate polyurethanes driven by the cooperation of disulfide and hydrogen bonds. Polym Chem 2020. [DOI: 10.1039/d0py01249a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Novel bio-based non-isocyanate polyurethanes with tunable mechanical and self-healing properties are successfully synthesized.
Collapse
Affiliation(s)
- Jincheng Dong
- Hebei Key Laboratory of Functional Polymer
- School of Chemical Engineering and Technology
- Hebei University of Technology
- Tianjin 300130
- China
| | - Binyuan Liu
- Hebei Key Laboratory of Functional Polymer
- School of Chemical Engineering and Technology
- Hebei University of Technology
- Tianjin 300130
- China
| | - Huining Ding
- Hebei Key Laboratory of Functional Polymer
- School of Chemical Engineering and Technology
- Hebei University of Technology
- Tianjin 300130
- China
| | - Junbin Shi
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Pro-cessing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
- China
| | - Ning Liu
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Pro-cessing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
- China
| | - Bin Dai
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Pro-cessing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
- China
| | - Il Kim
- Department of Polymer Science and Engineering
- Pusan National University
- Geumjeong-gu
- Republic of Korea
| |
Collapse
|
9
|
Bae S, Zhang C, Gillard RM, Lupton DW. Enantioselective N‐Heterocyclic Carbene Catalyzed Bis(enoate) Rauhut–Currier Reaction. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Song Bae
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Changhe Zhang
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Rachel M. Gillard
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - David W. Lupton
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| |
Collapse
|
10
|
Bae S, Zhang C, Gillard RM, Lupton DW. Enantioselective N‐Heterocyclic Carbene Catalyzed Bis(enoate) Rauhut–Currier Reaction. Angew Chem Int Ed Engl 2019; 58:13370-13374. [DOI: 10.1002/anie.201907111] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/15/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Song Bae
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Changhe Zhang
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Rachel M. Gillard
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - David W. Lupton
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| |
Collapse
|
11
|
Schmauck J, Breugst M. The potential of pnicogen bonding for catalysis - a computational study. Org Biomol Chem 2018; 15:8037-8045. [PMID: 28770945 DOI: 10.1039/c7ob01599b] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Pnicogen bonding is a noncovalent interaction between the electrophilic region of a phosphorus atom and a Lewis base. Although this interaction can be comparable in strength to other noncovalent interactions, no systematic application in organic synthesis or catalysis is known so far. To identify the potential of this interaction for organocatalysis, we have now analysed different pnicogen-bond donors as catalysts for the activation of three different model reactions employing density functional theory. Our calculations suggest rate accelerations of several orders of magnitude for all cases indicating that synthetic applications should be feasible. Furthermore, our results indicate that pnicogen-bond donors can be comparable to halogen-bond-based catalysts in these reactions.
Collapse
Affiliation(s)
- J Schmauck
- Universität zu Köln, Department für Chemie, Greinstraße 4, 50939 Köln, Germany.
| | | |
Collapse
|
12
|
Butkevich AN, Sednev MV, Shojaei H, Belov VN, Hell SW. PONy Dyes: Direct Addition of P(III) Nucleophiles to Organic Fluorophores. Org Lett 2018; 20:1261-1264. [DOI: 10.1021/acs.orglett.8b00270] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexey N. Butkevich
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Maksim V. Sednev
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Heydar Shojaei
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Vladimir N. Belov
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Stefan W. Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| |
Collapse
|
13
|
Follet E, Mayer P, Stephenson DS, Ofial AR, Berionni G. Reactivity-Tuning in Frustrated Lewis Pairs: Nucleophilicity and Lewis Basicity of Sterically Hindered Phosphines. Chemistry 2017; 23:7422-7427. [DOI: 10.1002/chem.201701080] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Indexed: 01/21/2023]
Affiliation(s)
- Elsa Follet
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstr. 5-13 81377 München Germany
| | - Peter Mayer
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstr. 5-13 81377 München Germany
| | - David S. Stephenson
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstr. 5-13 81377 München Germany
| | - Armin R. Ofial
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstr. 5-13 81377 München Germany
| | - Guillaume Berionni
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstr. 5-13 81377 München Germany
| |
Collapse
|
14
|
Dupré J, Gaumont AC, Lakhdar S. Mechanistic Investigations of Reactions of the Frustrated Lewis Pairs (Triarylphosphines/B(C 6F 5) 3) with Michael Acceptors. Org Lett 2017; 19:694-697. [PMID: 28103042 DOI: 10.1021/acs.orglett.6b03868] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Frustrated Lewis pair (FLP)-catalyzed reduction of Michael acceptors is a challenging reaction that proceeds with specific FLP structures. Kinetics and equilibrium of the reactions of two phosphines (Ar3P), namely tri(1-naphthyl)phosphine and tri(o-tolyl)phosphine, are reported with reference electrophiles. The reason for the failure of the FLPs (Ar3P/B(C6F5)3) to reduce activated alkenes under H2 pressure is shown to be a hydrophosphination process that inhibits the reduction reaction. Kinetic and thermodynamic factors controlling both pathways are discussed in light of Mayr's free linear energy relationships.
Collapse
Affiliation(s)
- Jonathan Dupré
- Normandie Université, Laboratoire de Chimie Moléculaire et Thio-organique, CNRS-UMR 6507, ENSICAEN, Université de Caen Normandie, 6, Boulevard du Maréchal Juin, Caen 14000, France
| | - Annie-Claude Gaumont
- Normandie Université, Laboratoire de Chimie Moléculaire et Thio-organique, CNRS-UMR 6507, ENSICAEN, Université de Caen Normandie, 6, Boulevard du Maréchal Juin, Caen 14000, France
| | - Sami Lakhdar
- Normandie Université, Laboratoire de Chimie Moléculaire et Thio-organique, CNRS-UMR 6507, ENSICAEN, Université de Caen Normandie, 6, Boulevard du Maréchal Juin, Caen 14000, France
| |
Collapse
|
15
|
Follet E, Mayer P, Mayr H. Lewis Acidities of Indol-3-ylmethylium Ions and Intrinsic Barriers of Their Reactions with Phosphines and Pyridines. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600572] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Elsa Follet
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstraße 5-13 81377 München Germany
| | - Peter Mayer
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstraße 5-13 81377 München Germany
| | - Herbert Mayr
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstraße 5-13 81377 München Germany
| |
Collapse
|
16
|
Hu P, Feng T, Yeung CC, Koo CK, Lau KC, Lam MHW. A Photo-Triggered Traceless Staudinger-Bertozzi Ligation Reaction. Chemistry 2016; 22:11537-42. [DOI: 10.1002/chem.201601807] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Indexed: 12/26/2022]
Affiliation(s)
- Peng Hu
- Department of Chemistry and Biology; City University of Hong Kong; 83 Tat Chee Avenue Hong Kong SAR China
| | - Tianshi Feng
- Department of Chemistry and Biology; City University of Hong Kong; 83 Tat Chee Avenue Hong Kong SAR China
- Advanced Laboratory for Environmental Research & Technology; USTC-CityU Suzhou China
- CAS Key Laboratory of Soft Matter Chemistry; Department of Polymer Science and Engineering; University of Science and Technology of China, Hefei; Anhui 230026 China
| | - Chi-Chung Yeung
- Department of Chemistry and Biology; City University of Hong Kong; 83 Tat Chee Avenue Hong Kong SAR China
| | - Chi-Kin Koo
- Department of Chemistry and Biology; City University of Hong Kong; 83 Tat Chee Avenue Hong Kong SAR China
| | - Kai-Chung Lau
- Department of Chemistry and Biology; City University of Hong Kong; 83 Tat Chee Avenue Hong Kong SAR China
| | - Michael H. W. Lam
- Department of Chemistry and Biology; City University of Hong Kong; 83 Tat Chee Avenue Hong Kong SAR China
| |
Collapse
|
17
|
Puente Á, He S, Corral-Bautista F, Ofial AR, Mayr H. Nucleophilic Reactivities of 2-Substituted Malonates. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600107] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
18
|
Kim KH, Lee S, Lee J, Kim JN. Synthesis of Ramirez ylides from Morita–Baylis–Hillman adducts of α-bromocinnamaldehyde: an intramolecular 1,6-conjugate addition of phosphorus ylide. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.083] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
19
|
Lee CJ, Tsai CC, Hong SH, Chang GH, Yang MC, Möhlmann L, Lin W. Preparation of Furo[3,2-c]coumarins from 3-Cinnamoyl-4-hydroxy-2H-chromen-2-ones and Acyl Chlorides: A Bu3P-Mediated C-Acylation/Cyclization Sequence. Angew Chem Int Ed Engl 2015; 54:8502-5. [PMID: 26033344 DOI: 10.1002/anie.201502789] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Indexed: 11/07/2022]
Abstract
A Bu3P-mediated cyclization reaction of 3-cinnamoyl-4-hydroxy-2H-chromen-2-ones though electrophilic addition of acyl chlorides towards the synthesis of highly functionalized furo[3,2-c]coumarins bearing a phosphorus ylide moiety is described. These unprecedented cyclization reaction proceeds under mild reaction conditions within short reaction times (1 min to 1 h), and can be further applied in the synthesis of alkenyl-substituted furo[3,2-c]coumarins by the treatment with carbonyl electrophiles under basic conditions.
Collapse
Affiliation(s)
- Chia-Jui Lee
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677 (Taiwan, R.O.C.)
| | - Cheng-Che Tsai
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677 (Taiwan, R.O.C.)
| | - Shao-Hao Hong
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677 (Taiwan, R.O.C.)
| | - Geng-Hua Chang
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677 (Taiwan, R.O.C.)
| | - Mei-Chun Yang
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677 (Taiwan, R.O.C.)
| | - Lennart Möhlmann
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677 (Taiwan, R.O.C.)
| | - Wenwei Lin
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677 (Taiwan, R.O.C.).
| |
Collapse
|
20
|
Lee CJ, Tsai CC, Hong SH, Chang GH, Yang MC, Möhlmann L, Lin W. Preparation of Furo[3,2-c]coumarins from 3-Cinnamoyl-4-hydroxy-2H-chromen-2-ones and Acyl Chlorides: A Bu3P-Mediated C-Acylation/Cyclization Sequence. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502789] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
21
|
Mayr H, Ammer J, Baidya M, Maji B, Nigst TA, Ofial AR, Singer T. Scales of Lewis basicities toward C-centered Lewis acids (carbocations). J Am Chem Soc 2015; 137:2580-99. [PMID: 25555037 DOI: 10.1021/ja511639b] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Equilibria for the reactions of benzhydryl cations (Ar2CH(+)) with phosphines, tert-amines, pyridines, and related Lewis bases were determined photometrically in CH2Cl2 and CH3CN solution at 20 °C. The measured equilibrium constants can be expressed by the sum of two parameters, defined as the Lewis Acidity (LA) of the benzhydrylium ions and the Lewis basicity (LB) of the phosphines, pyridines, etc. Least-squares minimization of log K = LA + LB with the definition LA = 0 for (4-MeOC6H4)2CH(+) gave a Lewis acidity scale for 18 benzhydrylium ions covering 18 orders of magnitude in CH2Cl2 as well as Lewis basicities (with respect to C-centered Lewis acids) for 56 bases. The Lewis acidities correlated linearly with the quantum chemically calculated (B3LYP/6-311++G(3df,2pd)//B3LYP/6-31G(d,p) level) methyl anion affinities of the corresponding benzhydrylium ions, which can be used as reference compounds for characterizing a wide variety of Lewis bases. The equilibrium measurements were complemented by isothermal titration calorimetry studies. Rates of SN1 solvolyses of benzhydryl chlorides, bromides, and tosylates derived from E(13-33)(+), i.e., from highly reactive carbocations, correlate excellently with the corresponding Lewis acidities and the quantum chemically calculated methyl anion affinities. This correlation does not hold for solvolyses of derivatives of the better stabilized amino-substituted benzhydrylium ions E(1-12)(+). In contrast, the correlation between electrophilic reactivities and Lewis acidities (or methyl anion affinities) is linear for all donor-substituted benzhydrylium ions E(1-21)(+), while the acceptor-substituted benzhydrylium ions E(26-33)(+) react more slowly than expected from their thermodynamic stabilities. The boundaries of linear rate-equilibrium relationships were thus defined.
Collapse
Affiliation(s)
- Herbert Mayr
- Department Chemie, Ludwig-Maximilians-Universität München , Butenandtstraße 5-13, Haus F, 81377 München, Germany
| | | | | | | | | | | | | |
Collapse
|
22
|
GABSI W, BOUBAKER T, GOUMONT R. Nucleophilicities of Para-Substituted Phenoxide Ions in Water and Correlation Analysis. INT J CHEM KINET 2014. [DOI: 10.1002/kin.20846] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- W. GABSI
- Laboratoire C.H.P.N.R, Faculté des Sciences de Monastir; Université de Monastir; Avenue de l'Environnement 5019 Monastir Tunisie
| | - T. BOUBAKER
- Laboratoire C.H.P.N.R, Faculté des Sciences de Monastir; Université de Monastir; Avenue de l'Environnement 5019 Monastir Tunisie
| | - R. GOUMONT
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles; 45, Avenue des Etats-Unis 78035 Versailles Cedex France
| |
Collapse
|
23
|
Mbofana CT, Miller SJ. Phosphine-Catalyzed Annulation Reactions of 2-Butynoate and α-Keto Esters: Synthesis of Cyclopentene Derivatives. ACS Catal 2014. [DOI: 10.1021/cs501117h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Curren T. Mbofana
- Department
of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Scott J. Miller
- Department
of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| |
Collapse
|
24
|
An F, Paul S, Ammer J, Ofial AR, Mayer P, Lakhdar S, Mayr H. Structures and Reactivities of Iminium Ions Derived from Substituted Cinnamaldehydes and Various Chiral Imidazolidin-4-ones. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201402009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
25
|
Affiliation(s)
- Jin‐Ming Yang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Mei Long Road, Shanghai 200237, People's Republic of China
| | - Xiang‐Ying Tang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, People's Republic of China, Fax: (+86)‐21‐6416‐6128
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, People's Republic of China, Fax: (+86)‐21‐6416‐6128
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Mei Long Road, Shanghai 200237, People's Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, People's Republic of China, Fax: (+86)‐21‐6416‐6128
| |
Collapse
|
26
|
Mechanistic insights into N- or P-centered nucleophile promoted thiol–vinylsulfone Michael addition. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.123] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
27
|
Ammer J, Mayr H. Photogeneration of carbocations: applications in physical organic chemistry and the design of suitable precursors. J PHYS ORG CHEM 2013. [DOI: 10.1002/poc.3132] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Johannes Ammer
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstrasse 5-13 (Haus F) 81377 München Germany
| | - Herbert Mayr
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstrasse 5-13 (Haus F) 81377 München Germany
| |
Collapse
|
28
|
Maji B, Baidya M, Ammer J, Kobayashi S, Mayer P, Ofial AR, Mayr H. Nucleophilic Reactivities and Lewis Basicities of 2-Imidazolines and Related N-Heterocyclic Compounds. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300213] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
29
|
Greb L, Tussing S, Schirmer B, Oña-Burgos P, Kaupmees K, Lõkov M, Leito I, Grimme S, Paradies J. Electronic effects of triarylphosphines in metal-free hydrogen activation: a kinetic and computational study. Chem Sci 2013. [DOI: 10.1039/c3sc50347j] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
|
30
|
Nigst TA, Antipova A, Mayr H. Nucleophilic Reactivities of Hydrazines and Amines: The Futile Search for the α-Effect in Hydrazine Reactivities. J Org Chem 2012; 77:8142-55. [DOI: 10.1021/jo301497g] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Tobias A. Nigst
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13 (Haus F), 81377
München, Germany
| | - Anna Antipova
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13 (Haus F), 81377
München, Germany
| | - Herbert Mayr
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13 (Haus F), 81377
München, Germany
| |
Collapse
|
31
|
Lindner C, Tandon R, Maryasin B, Larionov E, Zipse H. Cation affinity numbers of Lewis bases. Beilstein J Org Chem 2012; 8:1406-42. [PMID: 23019478 PMCID: PMC3458768 DOI: 10.3762/bjoc.8.163] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 07/27/2012] [Indexed: 11/23/2022] Open
Abstract
Using selected theoretical methods the affinity of a large range of Lewis bases towards model cations has been quantified. The range of model cations includes the methyl cation as the smallest carbon-centered electrophile, the benzhydryl and trityl cations as models for electrophilic substrates encountered in Lewis base-catalyzed synthetic procedures, and the acetyl cation as a substrate model for acyl-transfer reactions. Affinities towards these cationic electrophiles are complemented by data for Lewis-base addition to Michael acceptors as prototypical neutral electrophiles.
Collapse
Affiliation(s)
- Christoph Lindner
- Department of Chemistry, Ludwigs-Maximilians-Universität München, Butenandstr. 5–13, D-81377 München, Germany
| | - Raman Tandon
- Department of Chemistry, Ludwigs-Maximilians-Universität München, Butenandstr. 5–13, D-81377 München, Germany
| | - Boris Maryasin
- Department of Chemistry, Ludwigs-Maximilians-Universität München, Butenandstr. 5–13, D-81377 München, Germany
| | - Evgeny Larionov
- Department of Chemistry, Ludwigs-Maximilians-Universität München, Butenandstr. 5–13, D-81377 München, Germany
| | - Hendrik Zipse
- Department of Chemistry, Ludwigs-Maximilians-Universität München, Butenandstr. 5–13, D-81377 München, Germany
| |
Collapse
|
32
|
Ammer J, Sailer CF, Riedle E, Mayr H. Photolytic Generation of Benzhydryl Cations and Radicals from Quaternary Phosphonium Salts: How Highly Reactive Carbocations Survive Their First Nanoseconds. J Am Chem Soc 2012; 134:11481-94. [DOI: 10.1021/ja3017522] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Johannes Ammer
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13 (Haus F), 81377
München, Germany
| | - Christian F. Sailer
- Lehrstuhl für BioMolekulare
Optik, Ludwig-Maximilians-Universität München, Oettingenstrasse 67, 80538 München, Germany
| | - Eberhard Riedle
- Lehrstuhl für BioMolekulare
Optik, Ludwig-Maximilians-Universität München, Oettingenstrasse 67, 80538 München, Germany
| | - Herbert Mayr
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13 (Haus F), 81377
München, Germany
| |
Collapse
|
33
|
|
34
|
Troshin K, Mayer P, Mayr H. How Does Palladium Coordination Affect the Electrophilicities of Allyl Cations? Development of a Robust Kinetic Method for Following Reactions of [(η3-Diarylallyl)Pd(PPh3)2]+ with Nucleophiles. Organometallics 2012. [DOI: 10.1021/om3000357] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Konstantin Troshin
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13 (Haus F),
81377 München, Germany
| | - Peter Mayer
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13 (Haus F),
81377 München, Germany
| | - Herbert Mayr
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13 (Haus F),
81377 München, Germany
| |
Collapse
|
35
|
Kurbatov S, Lakhdar S, Goumont R, Terrier F. Super-electrophilic 10π Heteroaromatics. New Mechanistic and Synthetic Applications. ORG PREP PROCED INT 2012. [DOI: 10.1080/00304948.2012.697701] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
36
|
Ponomarov O, Laws AP, Hanusek J. 1,2,4-Dithiazole-5-ones and 5-thiones as efficient sulfurizing agents of phosphorus(iii) compounds – a kinetic comparative study. Org Biomol Chem 2012; 10:8868-76. [DOI: 10.1039/c2ob26460a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
37
|
Lakhdar S, Ammer J, Mayr H. Laserblitzphotolytische Erzeugung α,β-ungesättigter Iminium-Ionen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103683] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
38
|
Lakhdar S, Ammer J, Mayr H. Generation of α,β-Unsaturated Iminium Ions by Laser Flash Photolysis. Angew Chem Int Ed Engl 2011; 50:9953-6. [DOI: 10.1002/anie.201103683] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Indexed: 11/07/2022]
|
39
|
Maji B, Breugst M, Mayr H. N-Heterocyclic Carbenes: Organocatalysts with Moderate Nucleophilicity but Extraordinarily High Lewis Basicity. Angew Chem Int Ed Engl 2011; 50:6915-9. [DOI: 10.1002/anie.201102435] [Citation(s) in RCA: 158] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Indexed: 11/07/2022]
|
40
|
Maji B, Breugst M, Mayr H. N-Heterocyclische Carbene: Organokatalysatoren mit mäßiger Nucleophilie, aber außerordentlich hoher Lewis-Basizität. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102435] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
41
|
Pratihar S, Roy S. Reactivity and Selectivity of Organotin Reagents in Allylation and Arylation: Nucleophilicity Parameter as a Guide. Organometallics 2011. [DOI: 10.1021/om101030c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
42
|
Maji B, Joannesse C, Nigst TA, Smith AD, Mayr H. Nucleophilicities and Lewis Basicities of Isothiourea Derivatives. J Org Chem 2011; 76:5104-12. [DOI: 10.1021/jo200803x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Biplab Maji
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5−13 (Haus F), 81377 München, Germany
| | - Caroline Joannesse
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, United Kingdom
| | - Tobias A. Nigst
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5−13 (Haus F), 81377 München, Germany
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, United Kingdom
| | - Herbert Mayr
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5−13 (Haus F), 81377 München, Germany
| |
Collapse
|
43
|
Bentley TW. Nucleophilicity parameters for strong nucleophiles in dimethyl sulfoxide. A direct alternative to the s(E + N) equation. J PHYS ORG CHEM 2011. [DOI: 10.1002/poc.1747] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
44
|
Mayr H. Reply to T. W. Bentley: Limitations of the s(E+N) and Related Equations. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007923] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
45
|
Mayr H. Reply to T. W. Bentley: Limitations of the s(E+N) and Related Equations. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/anie.201007923] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
46
|
Maryasin B, Zipse H. Theoretical studies of 31P NMR spectral properties of phosphanes and related compounds in solution. Phys Chem Chem Phys 2011; 13:5150-8. [DOI: 10.1039/c0cp02653k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
47
|
Abstract
AbstractReview with 101 refs. of progress in synthetic applications and properties of P-acylphosphonium salts including acylation via P-acylphosphonium salts, enantioselective acylation using chiral phosphine ligands, nucleophilic (β)-oniovinylation, and reaction involving vinyloges of P-acylphosphonium salts formed by treatment conjugated alkenoates or alkynoates with phosphines.
Collapse
|
48
|
Pratihar S, Roy S. Nucleophilicity and site selectivity of commonly used arenes and heteroarenes. J Org Chem 2010; 75:4957-63. [PMID: 20670024 DOI: 10.1021/jo100425a] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
By using the inverse concept of electrophilicity and nucleophilicity and with four different available equations from literature for electrophilicity and electrodonating power, the nucleophilicity values of 69 commonly used arenes and heteroarenes have been calculated at the B3LYP/6-311+G(d,p) level of theory. The linearity between the nucleophilicity and Hammett sigma and sigma(p) values has been chosen as a test to judge the goodness of the methods used. Finally four different arene and heteroarene series (substituted indoles, phenols, pyrroles, and anisoles) have been subjected to local nucleophilicity analysis in order to predict the site selectivity in electrophilic aromatic substitution reactions (EAS). In each case we have obtained excellent correlation with the experimental result.
Collapse
Affiliation(s)
- Sanjay Pratihar
- Organometallics & Catalysis Laboratory, Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India
| | | |
Collapse
|
49
|
Ammer J, Baidya M, Kobayashi S, Mayr H. Nucleophilic reactivities of tertiary alkylamines. J PHYS ORG CHEM 2010. [DOI: 10.1002/poc.1707] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
50
|
Lindner C, Maryasin B, Richter F, Zipse H. Methyl cation affinity (MCA) values for phosphanes. J PHYS ORG CHEM 2010. [DOI: 10.1002/poc.1726] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|