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Cousin K, Menuel S, Monflier E, Hapiot F. Hydroformylation of Alkenes in a Planetary Ball Mill: From Additive-Controlled Reactivity to Supramolecular Control of Regioselectivity. Angew Chem Int Ed Engl 2017; 56:10564-10568. [PMID: 28672058 DOI: 10.1002/anie.201705467] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Indexed: 01/23/2023]
Abstract
The Rh-catalyzed hydroformylation of aromatic-substituted alkenes is performed in a planetary ball mill under CO/H2 pressure. The dispersion of the substrate molecules and the Rh-catalyst into the grinding jar is ensured by saccharides: methyl-α-d-glucopyranoside, acyclic dextrins, or cyclodextrins (CDs, cyclic oligosaccharides). The reaction affords the exclusive formation of aldehydes whatever the saccharide. Acyclic saccharides disperse the components within the solid mixture leading to high conversions of alkenes. However, they showed typical selectivity for α-aldehyde products. If CDs are the dispersing additive, the steric hindrance exerted by the CDs on the primary coordination sphere of the metal modifies the selectivity so that the β-aldehydes were also formed in non-negligible proportions. Such through-space control via hydrophobic effects over reactivity and regioselectivity reveals the potential of such solventless process for catalysis in solid state.
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Affiliation(s)
- Kévin Cousin
- Univ. Artois, CNRS, Centrale Lille, ENSCL, Univ. Lille, UMR 8181, Unité de Catalyse et de Chimie du Solide (UCCS), 62300, Lens, France
| | - Stéphane Menuel
- Univ. Artois, CNRS, Centrale Lille, ENSCL, Univ. Lille, UMR 8181, Unité de Catalyse et de Chimie du Solide (UCCS), 62300, Lens, France
| | - Eric Monflier
- Univ. Artois, CNRS, Centrale Lille, ENSCL, Univ. Lille, UMR 8181, Unité de Catalyse et de Chimie du Solide (UCCS), 62300, Lens, France
| | - Frédéric Hapiot
- Univ. Artois, CNRS, Centrale Lille, ENSCL, Univ. Lille, UMR 8181, Unité de Catalyse et de Chimie du Solide (UCCS), 62300, Lens, France
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2
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Cousin K, Menuel S, Monflier E, Hapiot F. Hydroformylation of Alkenes in a Planetary Ball Mill: From Additive-Controlled Reactivity to Supramolecular Control of Regioselectivity. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705467] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Kévin Cousin
- Univ. Artois, CNRS, Centrale Lille, ENSCL; Univ. Lille, UMR 8181; Unité de Catalyse et de Chimie du Solide (UCCS); 62300 Lens France
| | - Stéphane Menuel
- Univ. Artois, CNRS, Centrale Lille, ENSCL; Univ. Lille, UMR 8181; Unité de Catalyse et de Chimie du Solide (UCCS); 62300 Lens France
| | - Eric Monflier
- Univ. Artois, CNRS, Centrale Lille, ENSCL; Univ. Lille, UMR 8181; Unité de Catalyse et de Chimie du Solide (UCCS); 62300 Lens France
| | - Frédéric Hapiot
- Univ. Artois, CNRS, Centrale Lille, ENSCL; Univ. Lille, UMR 8181; Unité de Catalyse et de Chimie du Solide (UCCS); 62300 Lens France
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3
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Filloux C, Rovis T. Rh(I)-bisphosphine-catalyzed asymmetric, intermolecular hydroheteroarylation of α-substituted acrylate derivatives. J Am Chem Soc 2015; 137:508-17. [PMID: 25545834 PMCID: PMC4304441 DOI: 10.1021/ja511445x] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Indexed: 01/17/2023]
Abstract
Asymmetric hydroheteroarylation of alkenes represents a convenient entry to elaborated heterocyclic motifs. While chiral acids are known to mediate asymmetric addition of electron-rich heteroarenes to Michael acceptors, very few methods exploit transition metals to catalyze alkylation of heterocycles with olefins via a C-H activation, migratory insertion sequence. Herein, we describe the development of an asymmetric, intermolecular hydroheteroarylation reaction of α-substituted acrylates with benzoxazoles. The reaction provides 2-substitued benzoxazoles in moderate to excellent yields and good to excellent enantioselectivities. Notably, a series of mechanistic studies appears to contradict a pathway involving enantioselective protonation of a Rh(I)-enolate, despite the fact that such a mechanism is invoked almost unanimously in the related addition of aryl boronic acids to methacrylate derivatives. Evidence suggests instead that migratory insertion or beta-hydride elimination is enantiodetermining and that isomerization of a Rh(I)-enolate to a Rh(I)-heterobenzyl species insulates the resultant α-stereocenter from epimerization. A bulky ligand, CTH-(R)-Xylyl-P-Phos, is crucial for reactivity and enantioselectivity, as it likely discourages undesired ligation of benzoxazole substrates or intermediates to on- or off-cycle rhodium complexes and attenuates coordination-promoted product epimerization.
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Affiliation(s)
- Claire
M. Filloux
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Tomislav Rovis
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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Joe CL, Blaisdell TP, Geoghan AF, Tan KL. Distal-selective hydroformylation using scaffolding catalysis. J Am Chem Soc 2014; 136:8556-9. [PMID: 24902624 PMCID: PMC4227840 DOI: 10.1021/ja504247g] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In hydroformylation, phosphorus-based directing groups have been consistently successful at placing the aldehyde on the carbon proximal to the directing group. The design and synthesis of a novel catalytic directing group are reported that promotes aldehyde formation on the carbon distal relative to the directing functionality. This scaffolding ligand, which operates through a reversible covalent bond to the substrate, has been applied to the diastereoselective hydroformylation of homoallylic alcohols to afford δ-lactones selectively. Altering the distance between the alcohol and the olefin revealed that homoallylic alcohols gives the distal lactone with the highest levels of regioselectivity.
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Affiliation(s)
- Candice L Joe
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
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5
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Bates RW, Kasinathan S. Hydroformylation in Natural Product Synthesis. Top Curr Chem (Cham) 2013; 342:187-223. [DOI: 10.1007/128_2013_428] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Ueki Y, Ito H, Usui I, Breit B. Formation of quaternary carbon centers by highly regioselective hydroformylation with catalytic amounts of a reversibly bound directing group. Chemistry 2011; 17:8555-8. [PMID: 21728199 DOI: 10.1002/chem.201101186] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Yusuke Ueki
- Department of Chemistry, Faculty of Science, Nagoya University, B2-3(611) Chikusa, Nagoya 464-8603, Japan
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8
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Sun X, Frimpong K, Tan KL. Synthesis of quaternary carbon centers via hydroformylation. J Am Chem Soc 2010; 132:11841-3. [PMID: 20687551 DOI: 10.1021/ja1036226] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The application of hydroformylation to the synthesis of quaternary carbon centers is reported. The synthesis of the highly substituted carbon is achieved by applying a catalytic amount of 1. Ligand 1 serves as a catalytic directing group by covalently and reversibly binding to both the substrate and catalyst. The intramolecular nature of the directing group strategy accelerates the hydroformylation reaction such that the reaction is performed at mild temperatures (35-55 degrees C) and with excellent regioselectivity (b:l > 94:6).
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Affiliation(s)
- X Sun
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
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Zhang X, Cao B, Yu S, Zhang X. Rhodium-catalyzed asymmetric hydroformylation of N-allylamides: highly enantioselective approach to beta2-amino aldehydes. Angew Chem Int Ed Engl 2010; 49:4047-50. [PMID: 20506436 DOI: 10.1002/anie.201000955] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiaowei Zhang
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
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Zhang X, Cao B, Yu S, Zhang X. Rhodium-Catalyzed Asymmetric Hydroformylation of N-Allylamides: Highly Enantioselective Approach to β2-Amino Aldehydes. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000955] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Grünanger C, Breit B. Ferngesteuerte Regio- und Diastereoselektivität bei der Hydroformylierung von Bishomoallylalkoholen durch katalytische Mengen einer Katalysator-dirigierenden Gruppe. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200905949] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Reichard HA, McLaughlin M, Chen MZ, Micalizio GC. Regioselective Reductive Cross-Coupling Reactions of Unsymmetrical Alkynes. European J Org Chem 2010; 2010:391-409. [PMID: 24634606 PMCID: PMC3951371 DOI: 10.1002/ejoc.200901094] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Indexed: 12/17/2022]
Abstract
The present microreview summarizes our progress over the last few years in defining regioselective reductive cross-coupling reactions of unsymmetrical alkynes with terminal- and internal alkynes, aldehydes, and imines. We begin with a brief historical perspective of metal-mediated reductive dimerization reactions of aromatic alkynes and discuss the challenges associated with "crossed" versions of this mode of reactivity. Next, a collection of available methods that allow for regioselective reductive cross-coupling of internal alkynes with terminal and internal alkynes, aldehydes, and imines is summarized. After an examination of the requirements for regioselectivity in these cases, the logic behind our design of alkoxide-directed titanium-mediated reductive cross-coupling reactions is presented. A nomenclature is introduced to delineate the presumed mechanistic origin of regioselection associated with each reaction design, and a presentation of alkoxide-directed regioselective reductive cross-coupling reactions of alkynes follows. Throughout, principal issues related to reactivity and selectivity are discussed to assess scope and limitations of available methods and to describe the broad challenges that exist for defining complex fragment union reactions based on reductive cross-coupling chemistry.
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Affiliation(s)
| | | | | | - Glenn C. Micalizio
- Department of Chemistry, The Scripps Research Institute Scripps-Florida 130 Scripps Way #3A2 Jupiter, FL 33458 Fax: (561) 228-3092
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Grünanger C, Breit B. Remote Control of Regio- and Diastereoselectivity in the Hydroformylation of Bishomoallylic Alcohols with Catalytic Amounts of a Reversibly Bound Directing Group. Angew Chem Int Ed Engl 2009; 49:967-70. [DOI: 10.1002/anie.200905949] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Worthy AD, Gagnon MM, Dombrowski MT, Tan KL. Regioselective Hydroformylation of Sulfonamides using a Scaffolding Ligand. Org Lett 2009; 11:2764-7. [DOI: 10.1021/ol900921e] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amanda D. Worthy
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - Moriah M. Gagnon
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - Michael T. Dombrowski
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - Kian L. Tan
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
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Breit B, Grünanger CU, Abillard O. Directed Branched-Regioselective Hydroformylation of 2-Substituted Allylico-DPPB Esters. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700120] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Breit B, Breuninger D. Desymmetrizing Hydroformylation of Diallylcarbinols with the Aid of a Planar-Chiral, Catalyst-Directing Group. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500294] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Breit B, Breuninger D. Desymmetrizing Hydroformylation of Dialkenylcarbinols with the Aid of a Planar-Chiral, Catalyst-Directing Group. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500293] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Breit B, Winde R, Mackewitz T, Paciello R, Harms K. Phosphabenzenes as monodentate pi-acceptor ligands for rhodium-catalyzed hydroformylation. Chemistry 2001; 7:3106-21. [PMID: 11495438 DOI: 10.1002/1521-3765(20010716)7:14<3106::aid-chem3106>3.0.co;2-y] [Citation(s) in RCA: 162] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A new class of phosphinine/rhodium catalysts for the hydroformylation of terminal and internal alkenes is presented in this study. A series of phosphabenzenes 1-14 has been prepared by condensation of phosphane or tris(trimethylsilyl)phosphane with the corresponding pyrylium salt. Trans-[(phosphabenzene)2RhCl(CO)] complexes 21-25 have been prepared and studied spectroscopically and by X-ray crystal-structure analysis. The hydroformylation of oct-1-ene has been used to identify optimal catalyst preformation and reaction conditions. Hydroformylation studies with 15 monophosphabenzenes have been performed. The catalytic performance is dominated by steric influences, with the phosphabenzene 8/rhodium system being the most active catalyst. Turnover frequencies of up to 45370 h(-1) for the hydroformylation of oct-1-ene have been determined. In further studies, hydroformylation activity toward more highly substituted alkenes was investigated and compared with the standard industrial triphenylphosphane/rhodium catalyst. The reactivity differences between the phosphabenzene and the triphenylphosphane catalyst increase on going to the more highly substituted alkenes. Even tetrasubstituted alkenes reacted with the phosphabenzene catalyst, whereas the triphenylphosphane system failed to give any product. In situ pressure NMR experiments have been performed to identify the resting state of the catalyst. A monophosphabenzene complex [(phosphinine 8)Ir(CO)3H] could be detected as the predominant catalyst resting state.
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Affiliation(s)
- B Breit
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Germany.
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19
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Chen AC, Ren L, Decken A, Crudden CM. Rhodium Carbene Complexes: Highly Selective Catalysts for the Hydroformylation of Styrene Derivatives. Organometallics 2000. [DOI: 10.1021/om0003739] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Austin C. Chen
- Department of Chemistry, University of New Brunswick, P.O. Box 45222, Fredericton, New Brunswick, Canada E3B 6E2
| | - Li Ren
- Department of Chemistry, University of New Brunswick, P.O. Box 45222, Fredericton, New Brunswick, Canada E3B 6E2
| | - Andreas Decken
- Department of Chemistry, University of New Brunswick, P.O. Box 45222, Fredericton, New Brunswick, Canada E3B 6E2
| | - Cathleen M. Crudden
- Department of Chemistry, University of New Brunswick, P.O. Box 45222, Fredericton, New Brunswick, Canada E3B 6E2
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Breit B. Controlling Stereoselectivity with the Aid of a Reagent-Directing Group: Hydroformylation, Cuprate Addition, and Domino Reaction Sequences. Chemistry 2000. [DOI: 10.1002/(sici)1521-3765(20000502)6:9<1519::aid-chem1519>3.0.co;2-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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21
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Breit B, Zahn SK. Stereoselective hydroformylation, cuprate addition and domino reactions with the aid of a catalyst directing group. Polyhedron 2000. [DOI: 10.1016/s0277-5387(99)00397-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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22
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23
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Affiliation(s)
- M. E. Krafft
- Department of Chemistry, The Florida State University, Tallahassee, Florida 32306-4390
| | - X. Y. Yu
- Department of Chemistry, The Florida State University, Tallahassee, Florida 32306-4390
| | - L. J. Wilson
- Department of Chemistry, The Florida State University, Tallahassee, Florida 32306-4390
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Diastereoselective hydroformylation of acyclic olefins: Efficient construction of an all-anti stereotriade building block for polyketide synthesis. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00158-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Didiuk MT, Morken JP, Hoveyda AH. Phosphine-directed stereo- & regioselective Ni-catalyzed reactions of Grignard reagents with allylic ethers. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(97)10212-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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26
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Hingst M, Tepper M, Stelzer O. Nucleophilic Phosphanylation of Fluoroaromatic Compounds with Carboxyl, Carboxymethyl, and Aminomethyl Functionalities − an Efficient Synthetic Route to Amphiphilic Arylphosphanes. Eur J Inorg Chem 1998. [DOI: 10.1002/(sici)1099-0682(199801)1998:1<73::aid-ejic73>3.0.co;2-m] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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27
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28
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Breit B. Substrate-Directed Diastereoselective Hydroformylations, 1. Substrate-Directed Diastereoselective Hydroformylation of Methallylic Alcohols – Development of an Efficient Catalyst-Directing Group for Rhodium-Catalyzed Hydroformylation. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/jlac.199719970907] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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Breit B. Substratdirigierte, diastereoselektive Hydroformylierung von Methallylalkoholen. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961082335] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Doi T, Komatsu H, Yamamoto K. Diastereoselective hydroformylation of certain protected allylic alcohols. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)01502-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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32
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Syntheses of nitrogen heterocycles by means of amine-directed carbonylation and hydrocarbonylation. J Organomet Chem 1993. [DOI: 10.1016/0022-328x(93)83252-q] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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33
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Ager DJ, East MB. Methodology to establish 1,2- and 1,3-difunctionality for the synthesis of carbohydrate derivates. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)90970-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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35
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Starý I, Zajíček J, Kočovský P. Stereochemistry of the palladium-catalyzed allylic substitution: the syn-anti dichotomy in the formation of (π-allyl)palladium complexes and their equilibration. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)88263-6] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Ojima I, Zhang Z. Amide-directed hydrocarbonylation of N-alkenylamides and α-alkenyllactams. J Organomet Chem 1991. [DOI: 10.1016/0022-328x(91)80177-l] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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37
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Gladiali S, Pinna L. Asymmetric hydroformylation of N-acyl 1-aminoacrylic acid derivatives by rhodium/chiral diphosphine catalysts. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0957-4166(00)86114-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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38
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39
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Jackson W, Perlmutter P, Tasdelen E. Regio- and stereo-control in the rhodium catalysed hydroformylation of some alkenylphosphines. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)97389-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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40
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Phyllanthoside-Phyllanthostatin synthetic studies. 6. An augmented spiroketalization tactic for the total synthesis of phyllanthocin. Tetrahedron Lett 1989. [DOI: 10.1016/s0040-4039(00)70688-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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41
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Markó L. Transition metals in organic synthesis: Hydroformylation, reduction and oxidation Annual survey covering the year 1987. J Organomet Chem 1988. [DOI: 10.1016/0022-328x(88)80470-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Krafft ME, Wilson LJ, Onan KD. Regioselective hydrocarboxylations of olefinic amines: Characterization of a key intermediate. Tetrahedron Lett 1988. [DOI: 10.1016/s0040-4039(00)82362-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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44
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Brown JM, Cook SJ, Khan R. Hydroformylation catalysed by rhodium complexes of trehalose-derived ligands and -tredip; a highly recioselective route to α-methylarylpropionaldehydes. Tetrahedron 1986. [DOI: 10.1016/s0040-4020(01)88063-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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