51
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Campbell CD, Joannesse C, Morrill LC, Philp D, Smith AD. Regiodivergent Lewis base-promoted O- to C-carboxyl transfer of furanyl carbonates. Org Biomol Chem 2015; 13:2895-900. [DOI: 10.1039/c4ob02629b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Triazolinylidenes promote γ-selective C-carboxylation (up to 99 : 1 regioselectivity) in the O- to C-carboxyl transfer of furanyl carbonates in contrast to DMAP that promotes preferential α-C-carboxylation with moderate regiocontrol (typically 60 : 40 regioselectivity).
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Affiliation(s)
| | | | | | - Douglas Philp
- EaStCHEM
- School of Chemistry
- University of St Andrews
- St Andrews
- UK
| | - Andrew D. Smith
- EaStCHEM
- School of Chemistry
- University of St Andrews
- St Andrews
- UK
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52
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Huang X, Pham K, Zhang X, Yi WB, Hyatt JH, Tran AP, Jasinski JP, Zhang W. Recyclable organocatalyst-promoted one-pot Michael/aza-Henry/lactamization reactions for fluorinated 2-piperidinones bearing four stereogenic centres. RSC Adv 2015. [DOI: 10.1039/c5ra15306a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A highly efficient method for asymmetric synthesis of fluorinated 2-piperidinones bearing four stereogenic centres is introduced.
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Affiliation(s)
- Xin Huang
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | - Kenny Pham
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | - Xiaofeng Zhang
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | - Wen-Bin Yi
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Jeremy H. Hyatt
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | - Anthony P. Tran
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | | | - Wei Zhang
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
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53
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Yeh PP, Daniels DSB, Fallan C, Gould E, Simal C, Taylor JE, Slawin AMZ, Smith AD. Exploring the scope of the isothiourea-mediated synthesis of dihydropyridinones. Org Biomol Chem 2015; 13:2177-91. [DOI: 10.1039/c4ob02408g] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The exploration and expansion of the scope of the isothiourea-mediated synthesis of dihydropyridinones is presented.
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Affiliation(s)
- Pei-Pei Yeh
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | | | - Charlene Fallan
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | - Eoin Gould
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | - Carmen Simal
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | - James E. Taylor
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | | | - Andrew D. Smith
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
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54
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Cheng JT, Chen XY, Ye S. N-heterocyclic carbene-catalyzed cyclocondensation of 2-aryl carboxylic acids and enones: highly enantioselective synthesis of δ-lactones. Org Biomol Chem 2015; 13:1313-6. [DOI: 10.1039/c4ob02330g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The NHC-catalyzed [4 + 2] cyclocondensation of 2-aryl carboxylic acids with enones was developed, giving δ-lactones in good yields with high enantioselectivities.
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Affiliation(s)
- Jin-Tang Cheng
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Xiang-Yu Chen
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
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55
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Jin Z, Chen S, Wang Y, Zheng P, Yang S, Chi YR. β-Functionalization of Carboxylic Anhydrides with β-Alkyl Substituents through Carbene Organocatalysis. Angew Chem Int Ed Engl 2014; 53:13506-9. [DOI: 10.1002/anie.201408604] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Indexed: 11/05/2022]
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56
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Jin Z, Chen S, Wang Y, Zheng P, Yang S, Chi YR. β-Functionalization of Carboxylic Anhydrides with β-Alkyl Substituents through Carbene Organocatalysis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408604] [Citation(s) in RCA: 14] [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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57
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Chen XY, Gao ZH, Song CY, Zhang CL, Wang ZX, Ye S. N-Heterocyclic Carbene Catalyzed Cyclocondensation of α,β-Unsaturated Carboxylic Acids: Enantioselective Synthesis of Pyrrolidinone and Dihydropyridinone Derivatives. Angew Chem Int Ed Engl 2014; 53:11611-5. [DOI: 10.1002/anie.201407469] [Citation(s) in RCA: 139] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Indexed: 12/14/2022]
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58
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Chen XY, Gao ZH, Song CY, Zhang CL, Wang ZX, Ye S. N-Heterocyclic Carbene Catalyzed Cyclocondensation of α,β-Unsaturated Carboxylic Acids: Enantioselective Synthesis of Pyrrolidinone and Dihydropyridinone Derivatives. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407469] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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59
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Zarei M. A straightforward approach to 2-azetidinones from imines and carboxylic acids using dimethyl sulfoxide and acetic anhydride. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.07.089] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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60
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Lee A, Younai A, Price CK, Izquierdo J, Mishra RK, Scheidt KA. Enantioselective annulations for dihydroquinolones by in situ generation of azolium enolates. J Am Chem Soc 2014; 136:10589-92. [PMID: 25017004 PMCID: PMC4120988 DOI: 10.1021/ja505880r] [Citation(s) in RCA: 188] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Indexed: 12/14/2022]
Abstract
A convergent, catalytic asymmetric formal [4 + 2] annulation for the synthesis of dihydroquinolones has been developed. Carboxylic acids can be employed as precursors to NHC enolates through an in situ activation strategy. Simultaneous generation of a reactive aza-o-quinone methide under the basic conditions employed for NHC generation leads to a dual activation approach.
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Affiliation(s)
- Anna Lee
- Department of Chemistry,
Center for Molecular Innovation and Drug Discovery, Chemistry of Life
Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Ashkaan Younai
- Department of Chemistry,
Center for Molecular Innovation and Drug Discovery, Chemistry of Life
Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Christopher K. Price
- Department of Chemistry,
Center for Molecular Innovation and Drug Discovery, Chemistry of Life
Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Javier Izquierdo
- Department of Chemistry,
Center for Molecular Innovation and Drug Discovery, Chemistry of Life
Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Rama K. Mishra
- Department of Chemistry,
Center for Molecular Innovation and Drug Discovery, Chemistry of Life
Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Karl A. Scheidt
- Department of Chemistry,
Center for Molecular Innovation and Drug Discovery, Chemistry of Life
Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
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61
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Belmessieri D, de la Houpliere A, Calder EDD, Taylor JE, Smith AD. Stereodivergent organocatalytic intramolecular Michael addition/lactonization for the asymmetric synthesis of substituted dihydrobenzofurans and tetrahydrofurans. Chemistry 2014; 20:9762-9. [PMID: 24989672 PMCID: PMC4517160 DOI: 10.1002/chem.201402684] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Indexed: 11/19/2022]
Abstract
A stereodivergent asymmetric Lewis base catalyzed Michael addition/lactonization of enone acids into substituted dihydrobenzofuran and tetrahydrofuran derivatives is reported. Commercially available (S)-(-)-tetramisole hydrochloride gives products with high syn diastereoselectivity in excellent enantioselectivity (up to 99:1 d.r.syn/anti , 99 % eesyn ), whereas using a cinchona alkaloid derived catalyst gives the corresponding anti-diastereoisomers as the major product (up to 10:90 d.r.syn/anti , 99 % eeanti ).
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Affiliation(s)
- Dorine Belmessieri
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Alix de la Houpliere
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Ewen D D Calder
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - James E Taylor
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
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62
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Jiang S, Hu B, Yu X, Deng W. Fc-PIP Catalyzed Asymmetric Synthesis ofcis-2,3-Dihydrobenzofurans. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400186] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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63
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An efficient and green method for the synthesis of 2-azetidinones mediated by propylphosphonic anhydride (T3P®). MONATSHEFTE FUR CHEMIE 2014. [DOI: 10.1007/s00706-014-1217-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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64
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Smith SR, Leckie SM, Holmes R, Douglas J, Fallan C, Shapland P, Pryde D, Slawin AMZ, Smith AD. α-Ketophosphonates as ester surrogates: isothiourea-catalyzed asymmetric diester and lactone synthesis. Org Lett 2014; 16:2506-9. [PMID: 24734989 DOI: 10.1021/ol500873s] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Isothiourea HBTM-2.1 catalyzes the asymmetric Michael addition/lactonization of aryl- and alkenylacetic acids using α-keto-β,γ-unsaturated phosphonates as α,β-unsaturated ester surrogates, giving access to a diverse range of stereodefined lactones or enantioenriched functionalized diesters upon ring-opening.
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Affiliation(s)
- Siobhan R Smith
- EaStCHEM, School of Chemistry, University of St. Andrews , North Haugh, St. Andrews KY16 9ST, U.K
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65
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Morrill LC, Smith SM, Slawin AMZ, Smith AD. Isothiourea-mediated asymmetric functionalization of 3-alkenoic acids. J Org Chem 2014; 79:1640-55. [PMID: 24498850 DOI: 10.1021/jo402591v] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Isothiourea HBTM-2.1 promotes the catalytic asymmetric α-functionalization of 3-alkenoic acids through formal [2 + 2] cycloadditions with N-tosyl aldimines and formal [4 + 2] cycloadditions with either 4-aryltrifluoromethyl enones or N-aryl-N-aroyl diazenes, providing useful synthetic building blocks in good yield and with excellent enantiocontrol (up to >99% ee). Stereodefined products are amenable to further synthetic elaboration through manipulation of the olefinic functionality.
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Affiliation(s)
- Louis C Morrill
- EaStCHEM, School of Chemistry, University of St Andrews , North Haugh, St Andrews, KY16 9ST, U.K
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