51
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Patra T, Agasti S, Akanksha, Maiti D. Nickel-catalyzed decyanation of inert carbon–cyano bonds. Chem Commun (Camb) 2013; 49:69-71. [DOI: 10.1039/c2cc36883h] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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52
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Uranga JG, Chiosso AF, Santiago AN. One-step selective deoxygenation of alcohols from acyloins. RSC Adv 2013. [DOI: 10.1039/c3ra40343b] [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] Open
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53
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Patra T, Agasti S, Modak A, Maiti D. Nickel-catalyzed hydrogenolysis of unactivated carbon–cyano bonds. Chem Commun (Camb) 2013; 49:8362-4. [DOI: 10.1039/c3cc44562c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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54
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Meyer VJ, Niggemann M. Highly Chemoselective Calcium-Catalyzed Propargylic Deoxygenation. Chemistry 2012; 18:4687-91. [DOI: 10.1002/chem.201103691] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Indexed: 11/06/2022]
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55
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McMaster C, Bream RN, Grainger RS. Radical-mediated reduction of the dithiocarbamate group under tin-free conditions. Org Biomol Chem 2012; 10:4752-8. [DOI: 10.1039/c2ob25434d] [Citation(s) in RCA: 37] [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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56
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Stoltz B, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2011. [DOI: 10.1016/s0040-4020(11)00770-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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57
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Lam K, Markó IE. Novel Electrochemical Deoxygenation Reaction Using Diphenylphosphinates. Org Lett 2010; 13:406-9. [DOI: 10.1021/ol102714s] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kevin Lam
- Université Catholique de Louvain, Bâtiment Lavoisier, Place Louis Pasteur, 1, B-1348 Louvain-la-Neuve, Belgium
| | - István E. Markó
- Université Catholique de Louvain, Bâtiment Lavoisier, Place Louis Pasteur, 1, B-1348 Louvain-la-Neuve, Belgium
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58
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Stoltz B, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2010. [DOI: 10.1016/s0040-4020(10)01735-7] [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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59
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Sipilä K, Hase T, Koskimies J, Matikainen J, Kansikas J. Diastereoselectivity in Reactions of Lithiated 2-Phenylthiomethylthiotetrahydropyrans. PHOSPHORUS SULFUR 2010. [DOI: 10.1080/714976052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Kaija Sipilä
- a Laboratory of Organic Chemistry, Department of Chemistry , University of Helsinki , PO Box 55, University of Helsinki, FIN-00014, Finland
| | - Tapio Hase
- a Laboratory of Organic Chemistry, Department of Chemistry , University of Helsinki , PO Box 55, University of Helsinki, FIN-00014, Finland
| | - Jorma Koskimies
- a Laboratory of Organic Chemistry, Department of Chemistry , University of Helsinki , PO Box 55, University of Helsinki, FIN-00014, Finland
| | - Jorma Matikainen
- a Laboratory of Organic Chemistry, Department of Chemistry , University of Helsinki , PO Box 55, University of Helsinki, FIN-00014, Finland
| | - Jarno Kansikas
- b Laboratory of Inorganic Chemistry, Department of Chemistry , University of Helsinki , PO Box 55, University of Helsinki, FIN-00014, Finland
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60
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Basabe P, Martín M, Bodero O, Blanco A, Marcos I, Díez D, Urones J. Synthesis of (+)-makassaric acid, a protein kinase MK2 inhibitor. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.06.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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61
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Tobisu M, Nakamura R, Kita Y, Chatani N. Rhodium-Catalyzed Reductive Decyanation of Nitriles Using Hydrosilane as a Reducing Agent: Scope, Mechanism and Synthetic Application. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.03.582] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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62
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Kita Y, Tobisu M, Chatani N. Rhodium-Catalyzed Carbon-Cyano Bond Cleavage Reactions Using Organosilicon Reagents. J SYN ORG CHEM JPN 2010. [DOI: 10.5059/yukigoseikyokaishi.68.1112] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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63
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Takao KI, Hayakawa N, Yamada R, Yamaguchi T, Saegusa H, Uchida M, Samejima S, Tadano KI. Total syntheses of (+)- and (-)-pestalotiopsin A. J Org Chem 2009; 74:6452-61. [PMID: 19658390 DOI: 10.1021/jo9012546] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An enantioselective total synthesis of both enantiomers of caryophyllene-type sesquiterpenoid pestalotiopsin A has been achieved, thereby establishing the absolute stereochemistry of natural (+)-pestalotiopsin A. Highlights of the synthesis include a [2 + 2] cycloaddition of N-propioloyl Oppolzer's camphorsultam and ketene dialkyl acetal and subsequent highly stereoselective 1,4-hydride addition/protonation, an aldol reaction of functionalized bicyclic lactone with aldehyde, an efficient intramolecular Nozaki-Hiyama-Kishi (NHK) reaction for the construction of the highly strained (E)-cyclononene ring, and a palladium-catalyzed reduction of allylic mesylate with retention of the E configuration.
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Affiliation(s)
- Ken-ichi Takao
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
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64
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Zhan ZL, Ren FX, Zhao YM. Facile synthesis of D-lividosamine. Carbohydr Res 2009; 345:315-7. [PMID: 20004889 DOI: 10.1016/j.carres.2009.11.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Revised: 11/12/2009] [Accepted: 11/13/2009] [Indexed: 10/20/2022]
Abstract
A simple, four-step synthesis of D-lividosamine starting from N-acetyl-D-glucosamine via a furanosyl oxazoline intermediate is described.
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Affiliation(s)
- Zhi-Lai Zhan
- Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, 100850 Beijing, China
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65
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Stevens AT, Caira MR, Bull JR, Chibale K. Cycloaddition and one-carbon homologation studies in the synthesis of advanced iridoid precursors. Org Biomol Chem 2009; 7:3527-36. [PMID: 19675910 DOI: 10.1039/b902452b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Diels-Alder cycloaddition approach to the sweroside aglycone intermediate of iridoids was explored using silylated butenolides and levoglucosenone as dienophiles under both Lewis acid and thermal conditions. Results of this study reveal no evidence that using less sterically demanding derivatives compromise the diastereofacial selectivity of the cycloaddition using silylated butenolides. Further chemistry performed on cycloadducts concentrated on the identification and management of methodologies suitable for its conversion into sweroside aglycone. During the course of these studies, a dehydrative cyclisation onto a preformed tetrahydrofuran ring to a bis-tetrahydrofuranoid moiety was unravelled. In addition studies on levoglucosenone-derived cycloadducts provide extensive insight into the conformational behaviour and reactivity. Further, the X-ray crystal structure of an alcohol intermediate from one-carbon homologation studies provided the first structural evidence confirming the diastereoselectivity of the cycloaddition procedure.
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Affiliation(s)
- Anne T Stevens
- Department of Chemistry, University of Cape Town, Rondebosch, 7701, South Africa
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66
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Wang J, Huang W, Zhang Z, Xiang X, Liu R, Zhou X. FeCl3·6H2O Catalyzed Disproportionation of Allylic Alcohols and Selective Allylic Reduction of Allylic Alcohols and Their Derivatives with Benzyl Alcohol. J Org Chem 2009; 74:3299-304. [DOI: 10.1021/jo900070q] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jialiang Wang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People’s Republic of China
| | - Wen Huang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People’s Republic of China
| | - Zhengxing Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People’s Republic of China
| | - Xu Xiang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People’s Republic of China
| | - Ruiting Liu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People’s Republic of China
| | - Xigeng Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People’s Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai 200032, People’s Republic of China
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67
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Coombs TC, Zhang Y, Garnier-Amblard EC, Liebeskind LS. Organometallic enantiomeric scaffolding. Sequential semipinacol/1,5-"Michael-like" reactions as a strategic approach to bridgehead-quaternary center aza[3.3.1]bicyclics: application to the total synthesis of (-)-adaline. J Am Chem Soc 2009; 131:876-7. [PMID: 19123794 DOI: 10.1021/ja808533z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A nontraditional approach to the enantiocontrolled construction of quaternary center-bearing heteroatom-bridged bicyclo[3.3.1]nonanes (homotropanes) is reported that is based on organometallic enantiomeric scaffolding. This strategy takes advantage of the unique reactivity profiles of TpMo(CO)(2)(5-oxo-eta(3)-pyranyl) and TpMo(CO)(2)(5-oxo-eta(3)-pyridinyl) scaffolds, and features a molybdenum-mediated semipinacol/1,5-"Michael-like" reaction sequence to establish the quaternary center and synthesize the bridged bicyclic structure. An asymmetric total synthesis of (-)-adaline highlights this methodology.
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Affiliation(s)
- Thomas C Coombs
- Sanford S. Atwood Chemistry Center, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, USA
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68
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Kapeller DC, Hammerschmidt F. Enantiopure Chiral (2,4,6-Triisopropylbenzoyl)oxy-[D1]methyllithium: Configurational Stability, Reactions, and Mechanistic Studies. J Org Chem 2009; 74:2380-8. [DOI: 10.1021/jo802625q] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dagmar C. Kapeller
- Institute of Organic Chemistry, University of Vienna, Währingerstrasse 38, A-1090 Vienna, Austria
| | - Friedrich Hammerschmidt
- Institute of Organic Chemistry, University of Vienna, Währingerstrasse 38, A-1090 Vienna, Austria
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69
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Zhou C, Liu Y, Andaloussi M, Badgujar N, Plashkevych O, Chattopadhyaya J. Fine tuning of electrostatics around the internucleotidic phosphate through incorporation of modified 2',4'-carbocyclic-LNAs and -ENAs leads to significant modulation of antisense properties. J Org Chem 2009; 74:118-34. [PMID: 19055352 DOI: 10.1021/jo8016742] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the antisense (AS) and RNA interference (RNAi) technologies, the native single-stranded 2'-deoxyoligonucleotides (for AS) or double-stranded RNA (for RNAi) are chemically modified to bind to the target RNA in order to give improved downregulation of gene expression through inhibition of RNA translation. It is shown here how the fine adjustment of the electrostatic interaction by alteration of the substituents as well as their stereochemical environment around the internucleotidic phosphodiester moiety near the edge of the minor grove of the antisense oligonucleotides (AON)-RNA heteroduplex can lead to the modulation of the antisense properties. This was demonstrated through the synthesis of various modified carbocyclic-locked nucleic acids (LNAs) and -ethylene-bridged nucleic acids (ENAs) with hydroxyl and/or methyl substituents attached at the carbocyclic part and their integration into AONs by solid-phase DNA synthesis. The target affinity toward the complementary RNA and DNA, nuclease resistance, and RNase H elicitation by these modified AONs showed that both the nature of the modification (-OH versus -CH(3)) and their respective stereochemical orientations vis-a-vis vicinal phosphate play a very important role in modulating the AON properties. Whereas the affinity to the target RNA and the enzymatic stability of AONs were not favored by the hydrophobic and sterically bulky modifications in the center of the minor groove, their positioning at the edge of the minor groove near the phosphate linkage resulted in significantly improved nuclease resistance without loss of target affinity. On the other hand, hydrophilic modification, such as a hydroxyl group, close to the phosphate linkage made the internucleotidic phosphodiester especially nucleolytically unstable, and hence was not recommended. The substitutions on the carbocyclic moiety of the carba-LNA and -ENA did not affect significantly the choice of the cleavage sites of RNase H mediated RNA cleavage in the AON/RNA hybrid duplex, but the cleavage rate depended on the modification site in the AON sequence. If the original preferred cleavage site by RNase H was included in the 4-5nt stretch from the 3'-end of the modification site in the AON, decreased cleavage rate was observed. Upon screening of 52 modified AONs, containing 13 differently modified derivatives at C6' and C7' (or C8') of the carba-LNAs and -ENAs, two excellent modifications in the carba-LNA series were identified, which synergistically gave outstanding antisense properties such as the target RNA affinity, nuclease resistance, and RNase H activity and were deemed to be ideal candidates as potential antisense or siRNA therapeutic agents.
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Affiliation(s)
- Chuanzheng Zhou
- Department of Bioorganic Chemistry, Box 581, Biomedical Center, Uppsala University, SE-751 23 Uppsala, Sweden
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70
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Tobisu M, Nakamura R, Kita Y, Chatani N. Rhodium-Catalyzed Reductive Cleavage of Carbon−Cyano Bonds with Hydrosilane: A Catalytic Protocol for Removal of Cyano Groups. J Am Chem Soc 2009; 131:3174-5. [DOI: 10.1021/ja810142v] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mamoru Tobisu
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka, Japan, and Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University, Suita, Osaka, Japan
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71
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Dallanoce C, Magrone P, Bazza P, Grazioso G, Rizzi L, Riganti L, Gotti C, Clementi F, Frydenvang K, De Amici M. New Analogues of Epiboxidine Incorporating the 4,5-Dihydroisoxazole Nucleus: Synthesis, Binding Affinity at Neuronal Nicotinic Acetylcholine Receptors, and Molecular Modeling Investigations. Chem Biodivers 2009; 6:244-59. [DOI: 10.1002/cbdv.200800077] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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72
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Lam K, Markó IE. Organic electrosynthesis using toluates as simple and versatile radical precursors. Chem Commun (Camb) 2009:95-7. [DOI: 10.1039/b813545b] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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73
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Maddess ML, Tackett MN, Ley SV. Total synthesis studies on macrocyclic pipecolic acid natural products: FK506, the antascomicins and rapamycin. PROGRESS IN DRUG RESEARCH. FORTSCHRITTE DER ARZNEIMITTELFORSCHUNG. PROGRES DES RECHERCHES PHARMACEUTIQUES 2008; 66:13, 15-186. [PMID: 18416305 DOI: 10.1007/978-3-7643-8595-8_2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
This chapter derives its inspiration from the challenges presented to total synthesis chemists, by a particular group of macrocyclic pipecolic acid natural products. Although there is considerable emphasis on the completed syntheses of the main characters (FK506 (1), the antascomycins (4 and 5) and rapamycin (7)), the overall complexity of the molecular problem has stimulated a wealth of new knowledge, including the development of novel strategies and the invention of new synthetic methods. The ingenious and innovative approaches to these targets have enabled new generations of analogues, and provided material to further probe the biology of these fascinating molecules. With pharmaceutical application as an immunosuppressant, as well as potential use for the treatment of cancer and neurodegenerative diseases, this family of natural products continues to inspire new and interesting science while providing solutions to healthcare problems of the world.
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Affiliation(s)
- Matthew L Maddess
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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74
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Tetrahedron reports on organic chemistry. Tetrahedron 2008. [DOI: 10.1016/s0040-4020(08)00897-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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75
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Affiliation(s)
- Kevin Lam
- Département de Chimie, Bâtiment Lavoisier, Université catholique de Louvain, Place Louis Pasteur, 1, B-1348 Louvain-la-Neuve, Belgium
| | - István E. Markó
- Département de Chimie, Bâtiment Lavoisier, Université catholique de Louvain, Place Louis Pasteur, 1, B-1348 Louvain-la-Neuve, Belgium
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76
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Dornhagen J, Scharf HD. A Simple Synthesis of 2-Deoxy-3-O-Methyl-D-Arabino-Hexose VIA Photodeoxygenation. J Carbohydr Chem 2008. [DOI: 10.1080/07328308608082647] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Jürgen Dornhagen
- a Institut für Organische Chemie, der Technischen Hochschule Aachen , Prof.-Pirlet-Str. 1, 5100 , Aachen , Federal Republic of Germany
| | - Hans-Dieter Scharf
- a Institut für Organische Chemie, der Technischen Hochschule Aachen , Prof.-Pirlet-Str. 1, 5100 , Aachen , Federal Republic of Germany
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77
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Takao KI, Hayakawa N, Yamada R, Yamaguchi T, Morita U, Kawasaki S, Tadano KI. Total synthesis of (-)-pestalotiopsin A. Angew Chem Int Ed Engl 2008; 47:3426-9. [PMID: 18366053 DOI: 10.1002/anie.200800253] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ken-ichi Takao
- Department of Applied Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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78
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Takao KI, Hayakawa N, Yamada R, Yamaguchi T, Morita U, Kawasaki S, Tadano KI. Total Synthesis of (−)-Pestalotiopsin A. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200800253] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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79
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Sánchez-Roselló M, Puchlopek ALA, Morgan AJ, Miller SJ. Site-selective catalysis of phenyl thionoformate transfer as a tool for regioselective deoxygenation of polyols. J Org Chem 2008; 73:1774-82. [PMID: 18229939 PMCID: PMC4189089 DOI: 10.1021/jo702334z] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the application of peptide-embedded imidazoles as catalysts for the site-selective delivery of the phenyl thionoformate unit as a prelude to deoxygenation reactions of polyols. Methodology was developed that allows for the synthesis of thiocarbonyl derivatives based on a combination of additives that include N-alkylimidazoles and FeCl3 as co-catalysts. The use of this reagent combination leads to increased reaction rates and efficient yields relative to those of simple base-mediated reactions. In terms of controlling regioselectivity during the course of polyol modification, we found that histidine-containing peptides, in combination with FeCl3, could lead to modulation of the product distribution. Through screening of peptides and control of reaction conditions, products could be observed that reflected both the inherent preference of substrates and also reversal of inherent selectivity.
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Affiliation(s)
| | | | - Adam J. Morgan
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467
| | - Scott J. Miller
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, CT 06520-8107
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467
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80
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Winbush SM, Mergott DJ, Roush WR. Total Synthesis of (−)-Spinosyn A: Examination of Structural Features That Govern the Stereoselectivity of the Key Transannular Diels−Alder Reaction. J Org Chem 2008; 73:1818-29. [DOI: 10.1021/jo7024515] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- SusAnn M. Winbush
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48105
| | - Dustin J. Mergott
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48105
| | - William R. Roush
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48105
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81
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Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)01371-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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82
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Trullinger TK, Qi J, Roush WR. Studies on the synthesis of quartromicins a(3) and d(3): synthesis of the vertical and horizontal bis-spirotetronate fragments. J Org Chem 2007; 71:6915-22. [PMID: 16930045 PMCID: PMC2593838 DOI: 10.1021/jo061059c] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Syntheses of the vertical (3) and horizontal (4) bis-spirotetronate units of quartromicins A3 and D3 are described, along with an efficient synthesis of alpha-hydroxy aldehyde exo-8b, a precursor to the exo-spirotetronate fragments 19 and 21.
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Affiliation(s)
| | - Jun Qi
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109
| | - William R. Roush
- Department of Chemistry and Biochemistry, Scripps-Florida, Jupiter, FL 33458, e-mail:
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83
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Wilson ZE, Heapy AM, Brimble MA. Synthesis of indole analogues of the anti-Helicobacter pylori compounds CJ-13,015, CJ-13,102, CJ-13,104 and CJ-13,108. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.04.067] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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84
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Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)00834-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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85
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Tetrahedron reports on organic chemistry. Tetrahedron 2007. [DOI: 10.1016/s0040-4020(07)00205-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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86
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Maddess M, Tackett M, Watanabe H, Brennan P, Spilling C, Scott J, Osborn D, Ley S. Total Synthesis of Rapamycin. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604053] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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87
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Maddess ML, Tackett MN, Watanabe H, Brennan PE, Spilling CD, Scott JS, Osborn DP, Ley SV. Total Synthesis of Rapamycin. Angew Chem Int Ed Engl 2007; 46:591-7. [PMID: 17154218 DOI: 10.1002/anie.200604053] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Matthew L Maddess
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
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88
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Chaturvedi D, Ray S. A high yielding, one-pot synthesis of O,S-dialkyl dithiocarbonates from alcohols using Mitsunobu’s reagent. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2006.10.149] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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89
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Lectka T, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2006. [DOI: 10.1016/s0040-4020(06)01801-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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90
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Crawford JJ, Kerr WJ, McLaughlin M, Morrison AJ, Pauson PL, Thurston GJ. Use of a highly effective intramolecular Pauson–Khand cyclisation for the formal total synthesis of (±)-α- and β-cedrene by preparation of cedrone. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.05.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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91
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Sun DQ, Busson R, Herdewijn P. Synthesis of Deoxygenated Disaccharide Precursors for Modified Lipid II Synthesis. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600515] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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92
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Rauter AP, Fernandes AC, Figueiredo JA. A Novel Deoxygenation of Hydroxy Groups Activated by a Vicinal Carbonyl Group via Reaction with Ph3P/I2/Imidazole. J Carbohydr Chem 2006. [DOI: 10.1080/07328309808001882] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Amélia P. Rauter
- a Departamento de Química e Bioquímica , Faculdade de Ciěncias, Universidade de Lisboa Edificio C1 , 5° Piso, Campo Grande, 1700 , Lisboa , Portugal
| | - Ana C. Fernandes
- a Departamento de Química e Bioquímica , Faculdade de Ciěncias, Universidade de Lisboa Edificio C1 , 5° Piso, Campo Grande, 1700 , Lisboa , Portugal
| | - José A. Figueiredo
- b Departamento de Química , Universidade da Beira Interior , Covilhã , Portugal
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93
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Endo T, Araki Y. Synthesis of 1-O-(Methylthio)thiocarbonyl Sugar Derivatives Bearing Acyl Protective Groups Using Phase Transfer Catalysis Methods. J Carbohydr Chem 2006. [DOI: 10.1080/07328309708005757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Tadatoshi Endo
- a School of Dental Medicine, Tsurummi University , 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, 230, Japan
| | - Younosuke Araki
- b Department of Chemistry , Faculty of Science, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo, 152, Japan
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94
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Hladezuk I, Olesker A, Cléophax J, Lukacs G. Synthesis of 2-C- and 3-C-Aryl Pyranosides. J Carbohydr Chem 2006. [DOI: 10.1080/07328309808007461] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- I. Hladezuk
- a Institut de Chimie des Substances Naturelles, C.N.R.S. , Avenue de la Terrasse, 91198 , Gif-sur-Yvette , France
| | - A. Olesker
- a Institut de Chimie des Substances Naturelles, C.N.R.S. , Avenue de la Terrasse, 91198 , Gif-sur-Yvette , France
| | - J. Cléophax
- a Institut de Chimie des Substances Naturelles, C.N.R.S. , Avenue de la Terrasse, 91198 , Gif-sur-Yvette , France
| | - G. Lukacs
- a Institut de Chimie des Substances Naturelles, C.N.R.S. , Avenue de la Terrasse, 91198 , Gif-sur-Yvette , France
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95
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Lectka T, Motherwell W. Tetrahedron reports on organic chemistry. Tetrahedron 2006. [DOI: 10.1016/s0040-4020(06)00771-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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96
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Krohn K, Shuklov I. Two Efficient Syntheses of Protected 4‐Deoxy‐D‐lyxo‐hexose (4‐Desoxy‐D‐mannose). J Carbohydr Chem 2006. [DOI: 10.1080/07328300600770519] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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97
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Experimental Requirements for an Efficient Control of Free-Radical Polymerizations via the Reversible Addition-Fragmentation Chain Transfer (RAFT) Process. Macromol Rapid Commun 2006. [DOI: 10.1002/marc.200500839] [Citation(s) in RCA: 383] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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98
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Nakamura Y, Okada M, Koura M, Tojo M, Saito A, Sato A, Taguchi T. An efficient synthetic method for Z-fluoroalkene dipeptide isosteres: Application to the synthesis of the dipeptide isostere of Sta-Ala. J Fluor Chem 2006. [DOI: 10.1016/j.jfluchem.2005.11.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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99
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Zard SZ. The Genesis of the Reversible Radical Addition–Fragmentation–Transfer of Thiocarbonylthio Derivatives from the Barton–McCombie Deoxygenation: A Brief Account and Some Mechanistic Observations. Aust J Chem 2006. [DOI: 10.1071/ch06263] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The observations and reasoning leading to the discovery of the degenerative transfer of xanthates and related thiocarbonylthio derivatives are briefly described. A few synthetic applications are presented, and the consequences on the emergence of the RAFT and MADIX polymerization technologies as well as some mechanistic aspects are briefly discussed.
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100
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Enders D, Breuer I, Nühring A. First Asymmetric Synthesis of (+)-Sordidin and (-)-7-epi-Sordidin, Aggregation Pheromones of the Banana WeevilCosmopolites sordidus. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500112] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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