1
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Piątek A, Chapuis C. Regioselective Short Synthesis of Epiisoborneol Neopentyl Ether as Chiral Auxiliary: An Absolute Configuration Reset. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Anna Piątek
- Department of Organic Chemistry University of Warsaw ul. Pasteura 1 PL-02-093 Warsaw Poland
| | - Christian Chapuis
- Department of Organic Chemistry University of Geneva 30 Quai E. Ansermet CH-1211 Geneva 4 Switzerland
- Firmenich SA Corporate R&D Division, Synthesis Chemin de la Bergère 7 CH-1242 Satigny Switzerland
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2
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Eisold M, Kiefl GM, Didier D. Single-Pot Asymmetric Approach toward Enantioenriched Quaternary Stereocenter-Containing Alkylidenecyclobutanes. Org Lett 2016; 18:3022-5. [PMID: 27281109 DOI: 10.1021/acs.orglett.6b01432] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Enantioenriched alkylidenecyclobutanes possessing a quaternary stereogenic center, usually difficult to access, have been synthesized by combining a double boron-homologation and an allylboration through a highly efficient and diastereoselective one-pot process. Starting from commercially available substrates, this protocol represents a simple way of accessing chiral unsaturated four-membered ring systems with excellent stereoisomeric ratios.
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Affiliation(s)
- Michael Eisold
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University , Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Gabriel M Kiefl
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University , Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Dorian Didier
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-University , Butenandtstrasse 5-13, 81377 Munich, Germany
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3
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Hemelaere R, Carreaux F, Carboni B. Cross-Metathesis/Isomerization/Allylboration Sequence for a Diastereoselective Synthesis ofAnti-Homoallylic Alcohols from Allylbenzene Derivatives and Aldehydes. Chemistry 2014; 20:14518-23. [DOI: 10.1002/chem.201403954] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Indexed: 11/10/2022]
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4
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5
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Kobayashi S, Endo T, Yoshino T, Schneider U, Ueno M. Allylation reactions of aldehydes with allylboronates in aqueous media: unique reactivity and selectivity that are only observed in the presence of water. Chem Asian J 2013; 8:2033-45. [PMID: 23775867 DOI: 10.1002/asia.201300440] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Indexed: 11/07/2022]
Abstract
Zn(OH)2-catalyzed allylation reactions of aldehydes with allylboronates in aqueous media have been developed. In contrast to conventional allylboration reactions of aldehydes in organic solvents, the α-addition products were obtained exclusively. A catalytic cycle in which the allylzinc species was generated through a B-to-Zn exchange process is proposed and kinetic studies were performed. The key intermediate, an allylzinc species, was detected by HRMS (ESI) analysis and by online continuous MS (ESI) analysis. This analysis revealed that, in aqueous media, the allylzinc species competitively reacted with the aldehydes and water. An investigation of the reactivity and selectivity of the allylzinc species by using several typical allylboronates (6a-6d) clarified several important roles of water in this allylation reaction. The allylation reactions of aldehydes with allylboronic acid 2,2-dimethyl-1,3-propanediol esters proceeded smoothly in the presence of catalytic amounts of Zn(OH)2 and achiral ligand 4d in aqueous media to afford the corresponding syn-adducts in high yields with high diastereoselectivities. In all cases, the α-addition products were obtained and a wide substrate scope was tolerated. Furthermore, this reaction was applied to asymmetric catalysis by using chiral ligand 9. Based on the X-ray structure of the Zn-9 complex, several nonsymmetrical chiral ligands were also found to be effective. This reaction was further applied to catalytic asymmetric alkylallylation, chloroallylation, and alkoxyallylation processes and the synthetic utility of these reactions has been demonstrated.
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Affiliation(s)
- Shū Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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6
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Malkov AV, Stončius S, Bell M, Castelluzzo F, Ramírez-López P, Biedermannová L, Langer V, Rulíšek L, Kočovský P. Mechanistic Dichotomy in the Asymmetric Allylation of Aldehydes with Allyltrichlorosilanes Catalyzed by Chiral Pyridine N
-Oxides. Chemistry 2013; 19:9167-85. [DOI: 10.1002/chem.201203817] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Indexed: 11/11/2022]
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7
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Yus M, González-Gómez JC, Foubelo F. Diastereoselective Allylation of Carbonyl Compounds and Imines: Application to the Synthesis of Natural Products. Chem Rev 2013; 113:5595-698. [DOI: 10.1021/cr400008h] [Citation(s) in RCA: 398] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Miguel Yus
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
| | - José C. González-Gómez
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
| | - Francisco Foubelo
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
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8
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Berg CA, Eichenauer NC, Pietruszka J. (2R,3R)-1,4-Dimethoxy-1,1,4,4-tetraphenylbutane-2,3-diol: Valuable reagent in the asymmetric synthesis of organoboronates. PURE APPL CHEM 2012. [DOI: 10.1351/pac-con-12-03-04] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tartrate-derived (2R,3R)-1,4-dimethoxy-1,1,4,4-tetraphenylbutane-2,3-diol has found diverse applications in asymmetric organic synthesis. Among these, its utilization as a protecting group for boronic acids has been investigated extensively. Besides being extraordinarily stable and thus allowing a plethora of transformations, it enables access to various diastereo- and enantiomerically pure organoboron reagents and versatile intermediates in asymmetric synthesis.
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Affiliation(s)
- C. Annette Berg
- 1Institut für Bioorganische Chemie der Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, Stetternicher Forst, Geb.15.8, 52426 Jülich, Germany
| | - Nils C. Eichenauer
- 1Institut für Bioorganische Chemie der Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, Stetternicher Forst, Geb.15.8, 52426 Jülich, Germany
| | - Jörg Pietruszka
- 1Institut für Bioorganische Chemie der Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, Stetternicher Forst, Geb.15.8, 52426 Jülich, Germany
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9
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Ramachandran PV, Tafelska-Kaczmarek A, Sakavuyi K. Asymmetric Fluoroallylboration of Aldehydes. Org Lett 2011; 13:4044-7. [PMID: 21749050 DOI: 10.1021/ol201551y] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- P. Veeraraghavan Ramachandran
- Herbert C. Brown Center for Borane Research, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, United States
| | - Agnieszka Tafelska-Kaczmarek
- Herbert C. Brown Center for Borane Research, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, United States
| | - Kaumba Sakavuyi
- Herbert C. Brown Center for Borane Research, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, United States
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10
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Lichtenberg C, Robert D, Spaniol TP, Okuda J. Bis(allyl)aluminum Cation, Tris(allyl)aluminum, and Tetrakis(allyl)aluminate: Synthesis, Characterization, and Reactivity. Organometallics 2010. [DOI: 10.1021/om100809h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Crispin Lichtenberg
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
| | - Dominique Robert
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
| | - Thomas P. Spaniol
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
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11
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Ben Hassine B, Gorsane M, Pecher J, Martin RH. Synthèses Asymétriques Potentielles Impliquant la Réaction “Ene”. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19870961013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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12
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Fernández E, Pietruszka J, Frey W. Palladium-Catalyzed Synthesis of Enantiomerically Pure α-Substituted Allylboronic Esters and Their Addition to Aldehydes. J Org Chem 2010; 75:5580-9. [DOI: 10.1021/jo1008959] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Enrique Fernández
- Institut für Bioorganische Chemie der Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, Stetternicher Forst, Geb. 15.8, 52426 Jülich, Germany
| | - Jörg Pietruszka
- Institut für Bioorganische Chemie der Heinrich-Heine-Universität Düsseldorf im Forschungszentrum Jülich, Stetternicher Forst, Geb. 15.8, 52426 Jülich, Germany
| | - Wolfgang Frey
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
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13
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Enantioselective addition of β-functionalized allylboronates to aldehydes and aldimines. Stereocontrolled synthesis of α-methylene-γ-lactones and lactams. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.12.046] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Roman JG, Soderquist JA. Asymmetric synthesis of 2 degrees- and 3 degrees-Carbinols via B-methallyl-10-(TMS and Ph)-9-borabicyclo[3.3.2]decanes. J Org Chem 2007; 72:9772-5. [PMID: 17999524 DOI: 10.1021/jo701633k] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Simple Grignard procedures provide methallylboranes 1a and 1b in enantiomerically pure form from air-stable precursors in 98% and 95% yields, respectively. These reagents add smoothly to aldehydes and methyl ketones, respectively, providing branched 2 degrees- (6, 69-89%, 94-99% ee) and 3 degrees- (10, 71-87%, 74-96% ee) homoallylic alcohols.
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Affiliation(s)
- José G Roman
- Department of Chemistry, University of Puerto Rico, Rio Piedras, Puerto Rico 00931-3346
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15
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Lira R, Roush WR. Enantio- and Diastereoselective Synthesis of syn-β-Hydroxyallylsilanes via a Chiral (Z)-γ-Silylallylboronate. Org Lett 2007; 9:4315-8. [PMID: 17867698 DOI: 10.1021/ol7018746] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
syn-beta-Hydroxyallylsilanes of general structure 11 and 28 are prepared in 50-86% yield and 91-95% ee (for aliphatic aldehydes; 50% ee for benzaldehyde) via the BF(3).Et(2)O-promoted gamma-silylallylboration reactions, using reagents 14 and 15.
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Affiliation(s)
- Ricardo Lira
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, USA
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16
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Sugiura M. [Development of efficient methods for synthesis of nitrogen-containing compounds using carbamates, acylhydrazines, and ammonia]. YAKUGAKU ZASSHI 2007; 126:1319-40. [PMID: 17139157 DOI: 10.1248/yakushi.126.1319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
For the efficient synthesis of divergent nitrogen-containing compounds of pharmaceutical and agricultural importance, the development of efficient, complementary, and new synthetic methodologies is essential. One of the key subjects is how to introduce nitrogen atoms in to organic molecules. This review summaries our recent efforts on this issue, focusing on the use of carbamates, acylhydrazines, and ammonia as nitrogen sources.
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Affiliation(s)
- Masaharu Sugiura
- Faculty of Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Japan.
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17
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Regulation of Stereoselectivity and Reactivity in the Inter- and Intramolecular Allylic Transfer Reactions. B KOREAN CHEM SOC 2006. [DOI: 10.5012/bkcs.2006.27.4.463] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Burgos CH, Canales E, Matos K, Soderquist JA. Asymmetric Allyl- and Crotylboration with the Robust, Versatile, and Recyclable 10-TMS-9-borabicyclo[3.3.2]decanes. J Am Chem Soc 2005; 127:8044-9. [PMID: 15926828 DOI: 10.1021/ja043612i] [Citation(s) in RCA: 126] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The remarkable versatility and selectivity of the 10-(trimethylsilyl)-9-borabicyclo[3.3.2]decanes (10-TMS-9-BBDs) in the allyl- and crotylboration of representative aldehydes are reported. The new reagents are prepared through air-stable crystalline pseudoephedrine borinic ester complexes of the 10-TMS-9-BBDs (4), which are available in 63% overall yield from B-MeO-9-BBN through a simple two-step procedure. These complexes 4 are directly converted to the corresponding B-allyl-10-TMS-9-BBDs (1) with allylmagnesium bromide, which either can be isolated (98%) or used in situ for the allylations. The remarkable enantioselectivity (96 to > or =99% ee) of these reagents in the rapid (<3 h), asymmetric allylboration process at -78 degrees C is only slightly diminished when it is conducted at 25 degrees C, a phenomenon attributable to its rigid bicyclic structure. In addition to providing the homoallylic alcohols 6 efficiently (68-80%), the procedure also permits the efficient recovery of 4 (68-84%) for the direct regeneration of 1. Alternatively, an oxidative workup procedure can be used for the preparation of 6. The reagent gives predictable stereochemistry and exhibits an extremely high level of reagent control in the allylboration of d-glyceraldehyde acetonide. A simple and efficient procedure has been developed for the preparation of all four geometric and enantiomeric isomers of the B-crotyl-10-TMS-9-BBDs (10) from optically pure enantiomers of B-MeO-10-TMS-9-BBD (3). These reagents 10 also add rapidly (<3 h) and efficiently to representative aldehydes at -78 degrees C, providing ready access to all four of the possible stereoisomers of the beta-methyl homoallylic alcohols 12-15 (69-92%) in high dr (> or =98:2) and ee (94-99%).
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Affiliation(s)
- Carlos H Burgos
- Department of Chemistry, University of Puerto Rico, Rio Piedras, Puerto Rico 00931-3346
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Lachance H, St-Onge M, Hall DG. Practical and Efficient Multigram Preparation of a Camphor-Derived Diol for the Enantioselective Lewis Acid Catalyzed Allylboration of Aldehydes. J Org Chem 2005; 70:4180-3. [PMID: 15876115 DOI: 10.1021/jo050207g] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] Chiral diols are important molecules with widespread use as chiral auxiliaries and ligands in enantioselective synthesis. Therefore, efficient and practical syntheses of highly dissymmetrical nonracemic diols are still a meaningful pursuit. Two new routes to access camphor-derived chiral diol 1 have been developed. One route employs camphorquinone (3) as the starting material, affording in only two steps the desired diol in 55% overall yield. The second route, from camphor (2), leads to the desired diol in an efficient four-step synthesis, with an overall yield of 55%.
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Affiliation(s)
- Hugo Lachance
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
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20
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Malinowska A, Czeluśniak I, Górski M, Szymańska-Buzar T. W(II)-catalyzed hydroarylation of bicyclo[2.2.1]hept-2-ene by simple arenes. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.01.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Seebach D, Beck AK, Imwinkelzied R, Roggo S, Wonnacott A. Chirale Alkoxytitan(IV)-Komplexe für enantioselektive nucleophile Additionen an Aldehyde und alsLewis-Säuren inDiels-Alder-Reaktionen. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19870700406] [Citation(s) in RCA: 251] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Kennedy JWJ, Hall DG. Lewis Acid Catalyzed Allylboration: Discovery, Optimization, and Application to the Formation of Stereogenic Quaternary Carbon Centers. J Org Chem 2004; 69:4412-28. [PMID: 15202896 DOI: 10.1021/jo049773m] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A full account of the development of the first catalytic manifold for the additions of allylboronates to aldehydes is described. The thermal additions (both diastereospecific and enantioselective) of 2-carboxyester 3,3-disubstituted allylboronates 1 to both aromatic and aliphatic aldehydes give biologically and synthetically important exo-methylene butyrolactones 2 containing a beta-quaternary carbon center. Although the thermal reaction requires 14 d at room temperature to reach completion, the presence of certain metal salts allows for a 12-16 h reaction while preserving the diastereospecificity observed in the uncatalyzed process. Preliminary mechanistic studies on the origin of the catalytic effect are described as well as stereoselective transformations of lactones 2 into cyclic and acyclic stereotriads with potential usefulness as synthetic intermediates.
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Affiliation(s)
- Jason W J Kennedy
- Department of Chemistry, Gunning-Lemieux Chemistry Centre, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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23
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Sugiura M, Hirano K, Kobayashi S. α-Aminoallylation of Aldehydes with Ammonia: Stereoselective Synthesis of Homoallylic Primary Amines. J Am Chem Soc 2004; 126:7182-3. [PMID: 15186148 DOI: 10.1021/ja049689o] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Three-component reactions of aldehydes, ammonia, and allylboronates were found to provide homoallylic primary amines in high yields with high chemo- and stereoselectivities. A two-step, one-pot, stereoselective synthesis of an uncommon alpha-amino acid, alloisoleucine, was achieved utilizing this reaction.
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Affiliation(s)
- Masaharu Sugiura
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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24
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Rauniyar V, Hall DG. Lewis Acids Catalyze the Addition of Allylboronates to Aldehydes by Electrophilic Activation of the Dioxaborolane in a Closed Transition Structure. J Am Chem Soc 2004; 126:4518-9. [PMID: 15070360 DOI: 10.1021/ja049446w] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study addressed the mechanism of the recently reported Lewis acid-catalyzed manifold for additions of allylboronates to aldehydes. A series of control experiments using various reagents and conditions, and kinetic studies by low-temperature NMR spectroscopy, were performed to investigate the origin of the activation provided by the best catalyst, Sc(OTf)3. The results obtained are strongly supportive of a mechanism involving electrophilic boron activation by coordination of the metal ion to one of the boronate oxygens in a closed bimolecular transition state.
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Affiliation(s)
- Vivek Rauniyar
- Department of Chemistry, University of Alberta, Edmonton, AB, T6G 2G2, Canada
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Kennedy JWJ, Hall DG. Novel isomerically pure tetrasubstituted allylboronates: stereocontrolled synthesis of alpha-exomethylene gamma-lactones as aldol-like adducts with a stereogenic quaternary carbon center. J Am Chem Soc 2002; 124:898-9. [PMID: 11829585 DOI: 10.1021/ja016391e] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In spite of their inherent isomerization tendency and low reactivity, 1-alkoxycarbonyl vinylcopper(I) intermediates from the conjugate addition of organocuprates onto acetylenic esters were trapped with very high cis-addition selectivity with iodomethylboronic esters in the presence of HMPA. The resulting isomerically pure 3,3-disubstituted allylboronates react with aldehydes in a highly diastereo- and enantioselective manner, providing alpha-exomethylene gamma-lactones with a stereogenic quaternary beta-carbon center.
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Affiliation(s)
- Jason W J Kennedy
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
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28
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Arnauld T, Barrett AG, Seifried R. ROMPgel supported allylboronate: a purification-free method for the preparation of homoallylic alcohols. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01667-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Walton JC, McCarroll AJ, Chen Q, Carboni B, Nziengui R. The Influence of Boryl Substituents on the Formation and Reactivity of Adjacent and Vicinal Free Radical Centers. J Am Chem Soc 2000. [DOI: 10.1021/ja9944812] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John C. Walton
- Contribution from the School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, UK, and Synthèse et électrosynthèse organiques, UMR CNRS 6510, Université de Rennes 1, Avenue du Général Leclerc, 35042 Rennes CEDEX, France
| | - Andrew J. McCarroll
- Contribution from the School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, UK, and Synthèse et électrosynthèse organiques, UMR CNRS 6510, Université de Rennes 1, Avenue du Général Leclerc, 35042 Rennes CEDEX, France
| | - Qiao Chen
- Contribution from the School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, UK, and Synthèse et électrosynthèse organiques, UMR CNRS 6510, Université de Rennes 1, Avenue du Général Leclerc, 35042 Rennes CEDEX, France
| | - Bertrand Carboni
- Contribution from the School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, UK, and Synthèse et électrosynthèse organiques, UMR CNRS 6510, Université de Rennes 1, Avenue du Général Leclerc, 35042 Rennes CEDEX, France
| | - Roger Nziengui
- Contribution from the School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, UK, and Synthèse et électrosynthèse organiques, UMR CNRS 6510, Université de Rennes 1, Avenue du Général Leclerc, 35042 Rennes CEDEX, France
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Asymmetric synthesis using a new chiral β-functionalized allylboronate derived from endo-2-phenyl-exo-2,3-bornanediol: Preparation and reactions with aldehydes. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)00708-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Affiliation(s)
- Michael Reggelin
- Contribution from the Institut für Organische Chemie der Johann-Wolfgang-Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt/Main, Germany
| | - Heinz Weinberger
- Contribution from the Institut für Organische Chemie der Johann-Wolfgang-Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt/Main, Germany
| | - Matthias Gerlach
- Contribution from the Institut für Organische Chemie der Johann-Wolfgang-Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt/Main, Germany
| | - Reinhard Welcker
- Contribution from the Institut für Organische Chemie der Johann-Wolfgang-Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt/Main, Germany
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Hoffmann RW, Landmann B. Stereoselective synthesis of alcohols, XXIII. Transfer of chirality on addition of (α-chloroallyl)boronates to aldehydes. ACTA ACUST UNITED AC 1986. [DOI: 10.1002/cber.19861190622] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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