51
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Yu C, Jiao L, Tan X, Wang J, Xu Y, Wu Y, Yang G, Wang Z, Hao E. Straightforward Acid-Catalyzed Synthesis of Pyrrolyldipyrromethenes. Angew Chem Int Ed Engl 2012; 51:7688-91. [DOI: 10.1002/anie.201202850] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Indexed: 11/07/2022]
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52
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Yu C, Jiao L, Tan X, Wang J, Xu Y, Wu Y, Yang G, Wang Z, Hao E. Straightforward Acid-Catalyzed Synthesis of Pyrrolyldipyrromethenes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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53
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Magrez M, Wencel-Delord J, Crévisy C, Mauduit M. Enantioselective 1,4-conjugate addition of diethylzinc to (E)-alkenyl aryl ketones catalysed by Cu/DiPPAM complex. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.05.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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54
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Larson RT, Clift MD, Thomson RJ. Total Synthesis of the Galbulimima Alkaloid (−)-GB17. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108227] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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55
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Larson RT, Clift MD, Thomson RJ. Total synthesis of the Galbulimima alkaloid (-)-GB17. Angew Chem Int Ed Engl 2012; 51:2481-4. [PMID: 22287499 DOI: 10.1002/anie.201108227] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Indexed: 11/09/2022]
Affiliation(s)
- Reed T Larson
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd, Evanston, IL 60208, USA
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56
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Gulder T, Baran PS. Strained cyclophane natural products: Macrocyclization at its limits. Nat Prod Rep 2012; 29:899-934. [DOI: 10.1039/c2np20034a] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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57
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Loke I, Park N, Kempf K, Jagusch C, Schobert R, Laschat S. Influence of steric parameters on the synthesis of tetramates from α-amino-β-alkoxy-esters and Ph3PCCO. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.099] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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58
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Casey BM, Flowers RA. On the nature of the oxidative heterocoupling of lithium enolates. J Am Chem Soc 2011; 133:11492-5. [PMID: 21721524 DOI: 10.1021/ja205017e] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The coupling of enolates through single-electron oxidation is one of the most direct routes for generating 1,4-dicarbonyls. Recent work on the intermolecular heterocoupling of equimolar amounts of two different enolates through single-electron oxidation has shown that synthetically useful yields beyond those predicted by statistics can be obtained. To determine the underlying basis for the selective formation of heterocoupled products, kinetic, (7)Li NMR, and synthetic studies were performed. The collection of data obtained from these experiments shows that the selective formation of heterocoupled products is a consequence of heteroaggregation of lithium enolates.
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Affiliation(s)
- Brian M Casey
- Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, USA
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59
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Thompson BB, Montgomery J. Enone–Alkyne Reductive Coupling: A Versatile Entry to Substituted Pyrroles. Org Lett 2011; 13:3289-91. [DOI: 10.1021/ol201133n] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin B. Thompson
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - John Montgomery
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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60
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Rudolph A, Bos PH, Meetsma A, Minnaard AJ, Feringa BL. Catalytic Asymmetric Conjugate Addition/Oxidative Dearomatization Towards Multifunctional Spirocyclic Compounds. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102069] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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61
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Rudolph A, Bos PH, Meetsma A, Minnaard AJ, Feringa BL. Catalytic Asymmetric Conjugate Addition/Oxidative Dearomatization Towards Multifunctional Spirocyclic Compounds. Angew Chem Int Ed Engl 2011; 50:5834-8. [DOI: 10.1002/anie.201102069] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Indexed: 11/07/2022]
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62
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Casiraghi G, Battistini L, Curti C, Rassu G, Zanardi F. The Vinylogous Aldol and Related Addition Reactions: Ten Years of Progress. Chem Rev 2011; 111:3076-154. [DOI: 10.1021/cr100304n] [Citation(s) in RCA: 454] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giovanni Casiraghi
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27A, I-43124 Parma, Italy
| | - Lucia Battistini
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27A, I-43124 Parma, Italy
| | - Claudio Curti
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27A, I-43124 Parma, Italy
| | - Gloria Rassu
- Istituto di Chimica Biomolecolare del CNR, Traversa La Crucca 3, I-07100 Li Punti, Sassari, Italy
| | - Franca Zanardi
- Dipartimento Farmaceutico, Università degli Studi di Parma, Viale G. P. Usberti 27A, I-43124 Parma, Italy
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63
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64
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Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2009. Coord Chem Rev 2011. [DOI: 10.1016/j.ccr.2010.07.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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65
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Five-Membered Ring Systems. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/s0959-6380(11)22006-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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66
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Zhu XY, An XL, Li CF, Zhang FG, Hua QL, Chen JR, Xiao WJ. A Practical and Enantioselective Approach to Tetrahydrocarbazoles by Asymmetric Organocatalysis. ChemCatChem 2010. [DOI: 10.1002/cctc.201000379] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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67
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Hu DX, Clift MD, Lazarski KE, Thomson RJ. Enantioselective total synthesis and confirmation of the absolute and relative stereochemistry of streptorubin B. J Am Chem Soc 2010; 133:1799-804. [PMID: 21166419 DOI: 10.1021/ja109165f] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The enantioselective total synthesis of the pyrrolophane natural product streptorubin B is described. Key steps in the concise route include the application of a one-pot enantioselective aldol cyclization/Wittig reaction and an anionic oxy-Cope rearrangement to forge the crucial 10-membered ring. Comparisons between CD spectra of synthetic and natural samples of streptorubin B coupled with X-ray crystallography allowed for the determination of the absolute stereochemistry of this natural product for the first time. These studies also provided unambiguous proof of the relative configuration between the butyl side chain and the bispyrrole subunit. Additional studies revealed a novel atropstereoselective Paal-Knorr pyrrole condensation and provided fundamental experimental insight into the barrier for atropisomerization of the natural product.
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68
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Konkol LC, Jones BT, Thomson RJ. Oxidative carbon-carbon bond formation via allyldimethylsilyl enol ethers. Org Lett 2010; 11:5550-3. [PMID: 19888716 DOI: 10.1021/ol902400q] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A method for the oxidative alkylation of ketones through intramolecular allyl-group transfer within preformed allyldimethylsilyl enol ethers is reported. A number of examples are detailed, including a study into the effects of resident sterocenters within cyclic enol ethers.
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Affiliation(s)
- Leah C Konkol
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
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69
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Anion Binding and Transport by Prodigiosin and Its Analogs. TOPICS IN HETEROCYCLIC CHEMISTRY 2010. [DOI: 10.1007/7081_2010_29] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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