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Furuta M, Sugiyama K, Yamaguchi M, Ueda H, Tokuyama H. Synthesis of Propargylic Ethers by Gold-Mediated Reaction of Terminal Alkynes with Acetals. Chem Pharm Bull (Tokyo) 2019; 67:872-876. [DOI: 10.1248/cpb.c19-00322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Miyu Furuta
- Graduate School of Pharmaceutical Sciences, Tohoku University
| | - Kyoko Sugiyama
- Graduate School of Pharmaceutical Sciences, Tohoku University
| | | | - Hirofumi Ueda
- Graduate School of Pharmaceutical Sciences, Tohoku University
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2
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Berthet M, Songis O, Taillier C, Dalla V. Catalytic Alkynylation of Cyclic Acetals and Ketals Enabled by Synergistic Gold(I)/Trimethylsilyl Catalysis. J Org Chem 2017; 82:9916-9922. [PMID: 28812891 DOI: 10.1021/acs.joc.7b01828] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A completely regioselective and challenging gold(I)-catalyzed ring-opening of cyclic 1,3-dioxolanes and dioxanes by trimethylsilyl alkynes to set diol-derived propargyl trimethylsilyl bis-ethers is reported. This unprecedented and not trivial transformation does not operate with the catalytic methodologies recently reported for catalytic alkynylation of acyclic acetals/ketals, and is uniquely enabled by the application of a recently introduced synergistic gold(I)-silicon catalysis concept capable of producing simultaneously catalytic amounts of two key players, a silicon-based Lewis superacid and a nucleophilic gold acetylide.
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Affiliation(s)
- Mathéo Berthet
- UNIHAVRE, FR 3032, URCOM EA 3221 , 76600 le Havre, 25 rue Philippe Lebon, BP 540, 76058-F Le Havre, France
| | - Olivier Songis
- UNIHAVRE, FR 3032, URCOM EA 3221 , 76600 le Havre, 25 rue Philippe Lebon, BP 540, 76058-F Le Havre, France
| | - Catherine Taillier
- UNIHAVRE, FR 3032, URCOM EA 3221 , 76600 le Havre, 25 rue Philippe Lebon, BP 540, 76058-F Le Havre, France
| | - Vincent Dalla
- UNIHAVRE, FR 3032, URCOM EA 3221 , 76600 le Havre, 25 rue Philippe Lebon, BP 540, 76058-F Le Havre, France
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Liu J, Li H, Zheng C, Lu S, Guo X, Yin X, Na R, Yu B, Wang M. A General Asymmetric Synthesis of (R)-Matsutakeol and Flavored Analogs. Molecules 2017; 22:molecules22030364. [PMID: 28264452 PMCID: PMC6155351 DOI: 10.3390/molecules22030364] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 02/21/2017] [Accepted: 02/24/2017] [Indexed: 11/16/2022] Open
Abstract
An efficient and practical synthetic route toward chiral matsutakeol and analogs was developed by asymmetric addition of terminal alkyne to aldehydes. (R)-matsutakeol and other flavored substances were feasibly synthesized from various alkylaldehydes in high yield (up to 49.5%, in three steps) and excellent enantiomeric excess (up to >99%). The protocols may serve as an alternative asymmetric synthetic method for active small-molecule library of natural fatty acid metabolites and analogs. These chiral allyl alcohols are prepared for food analysis and screening insect attractants.
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Affiliation(s)
- Jia Liu
- Collaborative Innovation Center of Henan Grain Crops, National Key Laboratory of Wheat and Maize Crop Science, College of Plant Protection, Henan Agricultural University, Wenhua Road No. 95, Zhengzhou 450002, China.
| | - Honglian Li
- Collaborative Innovation Center of Henan Grain Crops, National Key Laboratory of Wheat and Maize Crop Science, College of Plant Protection, Henan Agricultural University, Wenhua Road No. 95, Zhengzhou 450002, China.
| | - Chao Zheng
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, School of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 57115, China.
| | - Shichao Lu
- Collaborative Innovation Center of Henan Grain Crops, National Key Laboratory of Wheat and Maize Crop Science, College of Plant Protection, Henan Agricultural University, Wenhua Road No. 95, Zhengzhou 450002, China.
| | - Xianru Guo
- Collaborative Innovation Center of Henan Grain Crops, National Key Laboratory of Wheat and Maize Crop Science, College of Plant Protection, Henan Agricultural University, Wenhua Road No. 95, Zhengzhou 450002, China.
| | - Xinming Yin
- Collaborative Innovation Center of Henan Grain Crops, National Key Laboratory of Wheat and Maize Crop Science, College of Plant Protection, Henan Agricultural University, Wenhua Road No. 95, Zhengzhou 450002, China.
| | - Risong Na
- Collaborative Innovation Center of Henan Grain Crops, National Key Laboratory of Wheat and Maize Crop Science, College of Plant Protection, Henan Agricultural University, Wenhua Road No. 95, Zhengzhou 450002, China.
- School of Sciences, China Agricultural University, Beijing 100193, China.
| | - Bin Yu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China.
| | - Min Wang
- School of Sciences, China Agricultural University, Beijing 100193, China.
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Gil-Negrete JM, Pérez Sestelo J, Sarandeses LA. Transition-Metal-Free Cross-Coupling of Indium Organometallics with Chromene and Isochroman Acetals Mediated by BF3·OEt2. Org Lett 2016; 18:4316-9. [PMID: 27530143 DOI: 10.1021/acs.orglett.6b02058] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A transition-metal-free coupling of triorganoindium reagents with benzopyranyl acetals mediated by a Lewis acid has been developed. The reaction of R3In with chromene and isochroman acetals in the presence of BF3·OEt2 afforded 2-substituted chromenes and 1-substituted isochromans, respectively, in good yields. The reactions proceed with a variety of triorganoindium reagents (aryl, heteroaryl, alkynyl, alkenyl, alkyl) using only 50 mol % of the organometallic, thus demonstrating the efficiency of these species. Preliminary mechanistic studies indicate the formation of an oxocarbenium ion intermediate in the presence of the Lewis acid.
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Affiliation(s)
- José M Gil-Negrete
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , E-15071 A Coruña, Spain
| | - José Pérez Sestelo
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , E-15071 A Coruña, Spain
| | - Luis A Sarandeses
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , E-15071 A Coruña, Spain
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Baxter M, Bolshan Y. A General Access to Propargylic Ethers through Brønsted Acid Catalyzed Alkynylation of Acetals and Ketals with Trifluoroborates. Chemistry 2015; 21:13535-8. [DOI: 10.1002/chem.201502797] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Indexed: 11/10/2022]
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Asano K, Matsubara S. Asymmetric Synthesis of 1,3-Dioxolanes by Organocatalytic Formal [3 + 2] Cycloaddition via Hemiacetal Intermediates. Org Lett 2012; 14:1620-3. [DOI: 10.1021/ol3003755] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
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Ebens R, Kellogg RM. 1-Aryl-2,2-dimethyl-1,3-propanediols as chiral auxiliaries. Acetal formation with α,β-unsaturated aldehydes and analysis of the stereochemistry of cyclopropanation. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19901091104] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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8
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Tsai CY, Sung R, Zhuang BR, Sung K. TiCl4-activated selective nucleophilic substitutions of tert-butyl alcohol and benzyl alcohols with π-donating substituents. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.06.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Bates RW, Lu Y, Cai MP. Ring opening of cyclic N,O-acetals with allyltrimethylsilane under Lewis acidic conditions. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.07.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Talukdar S, Nayak SK, Banerji A. Low-Valent Titanium Mediated Reductive Cleavage of Benzylidene Acetals: A Modified Mcmurry Reaction. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397919808004285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Denmark SE, Yang SM. Intramolecular silicon-assisted cross-coupling: total synthesis of (+)-brasilenyne. J Am Chem Soc 2002; 124:15196-7. [PMID: 12487594 DOI: 10.1021/ja028936q] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first, total synthesis of (+)-brasilenyne (1) has been achieved in 19 steps from l-(S)-malic acid. The key elements of this approach are a highly diastereoselective ring-opening of a 1,3-dioxolanone with bis(trimethylsilyl)acetylene) promoted by TiCl4 to set a propargylic stereocenter and the successful application of the sequential ring closing metathesis/silicon-assisted intramolecular cross-coupling reaction for construction of the oxonin core structure of 1.
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Affiliation(s)
- Scott E Denmark
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, 600 South Mathews Avenue, Urbana, Illinois 61801, USA.
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12
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Tandem Cyclization of Alkynylmetals Bearing a Remote Leaving Group via Cycloalkylidene Carbenes. Org Lett 2000; 2:1855-1857. [PMID: 10891175 DOI: 10.1021/ol0059145] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Treatment of terminal alkynes bearing a remote leaving group with MNR(2) (M = Li, Na, K) gives bicyclo[n.3.0]-1-alkenes (n = 3, 4). The tandem cyclization proceeds through a mechanism involving exo-cyclization of an alkynylmetal intermediate and intramolecular C-H insertion of the resulting carbenoid.
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Fleming I, Barbero A, Walter D. Stereochemical Control in Organic Synthesis Using Silicon-Containing Compounds. Chem Rev 1997; 97:2063-2192. [PMID: 11848898 DOI: 10.1021/cr941074u] [Citation(s) in RCA: 735] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ian Fleming
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, England
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Alzeer J, Cai C, Vasella A. Oligosaccharide Analogues of Polysaccharides. Part 1. Concept and synthesis of monosaccharide-derived monomers. Helv Chim Acta 1995. [DOI: 10.1002/hlca.19950780122] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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18
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Lautens M, Delanghe PHM. Regioselektive Palladium-katalysierte Reduktion von 3,3-heterodimetallierten Allylacetaten – Synthese und Reaktivität von dimetallierten Allylverbindungen. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941062327] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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19
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Leteux C, Veyrières A. Synthesis of α-C-glycopyranosides ofD-galactosamine andD-glucosamine via iodocyclization of corresponding glycals and silver tetrafluoroboranuidepromoted alkynylation at the anomeric centre. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/p19940002647] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Meyer FE, Henniges H, de Meijere A. Palladium-catalyzed polycyclizations of substituted dienynes: Stereoselective routes to highly complex polycycles. Tetrahedron Lett 1992. [DOI: 10.1016/s0040-4039(00)74711-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Yamaguchi M, Hayashi A, Hirama M. Direct Formation of Reactive Alkynyltrichlorotins from 1-Alkynes, SnCl4, and Bu3N. A Mild Alkynylation Reagent of Aldehydes, Acetals, and Enones. CHEM LETT 1992. [DOI: 10.1246/cl.1992.2479] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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24
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Shimizu M, Kawanami H, Fujisawa T. A Lipase Mediated Asymmetric Hydrolysis of 3-Acyloxy-1-octynes and 3-(E)-Acyloxy-1-octenes. CHEM LETT 1992. [DOI: 10.1246/cl.1992.107] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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Hashimoto SI, Kase S, Suzuki A, Yanagiya Y, Ikegami S. A Practical Access to Optically Pure (S)-1-Octyn-3-ol. SYNTHETIC COMMUN 1991. [DOI: 10.1080/00397919108019765] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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26
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Holmes AB, Tabor AB, Baker R. Enantioselective synthesis of (S)-γ-acetylenic γ-aminobutyric acid (GABA). ACTA ACUST UNITED AC 1991. [DOI: 10.1039/p19910003301] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Holmes AB, Tabor AB, Baker R. Enantioselective synthesis of (S)-trans-γ-butenynyl γ-aminobutyric acid (GABA). ACTA ACUST UNITED AC 1991. [DOI: 10.1039/p19910003307] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Glänzer BI, Königsberger K, Berger B, Faber K, Griengl H. Strategies for the chemoenzymatic preparation of optically active 1-alkyn-3-ols. Chem Phys Lipids 1990; 54:43-8. [PMID: 2113835 DOI: 10.1016/0009-3084(90)90058-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A series of (R)- and (S)-1-alkyn-3-ols, chiral building units for the synthesis of leukotrienes and pheromones, were prepared via enantioselective hydrolysis of their racemic esters. While the majority of biocatalysts employed (lipases, fermenting or freeze-dried microorganisms) failed in discriminating between enantiomers, lyophilized cells of baker's yeast (Saccharomyces cerevisiae Hansen) gave (S)-1-alkyn-3-ols and their corresponding (R)-esters with greater than 90% e.e.
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Affiliation(s)
- B I Glänzer
- Institute of Organic Chemistry, Graz University of Technology, Austria
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Ishihara K, Mori A, Yamamoto H. Stereoselective reduction of acetals. A method for reductive generation of heterocyclic ring systems. Tetrahedron 1990. [DOI: 10.1016/s0040-4020(01)85584-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Crich D, Simon FM. Acyl radical cyclizations in synthesis. Part 1. Substituent effects on the mode and efficiency of cyclization of 6-heptenoyl radicals. Tetrahedron 1989. [DOI: 10.1016/s0040-4020(01)89534-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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32
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Hayashi M, Inubushi A, Mukaiyama T. A Convenient Method for the Preparation of Secondary Propargylic Ethers. The Reactions of Acetals with 1-Trimethylsilyl-1-alkynes Promoted by the Combined Use of Catalytic Amounts of Tin(IV) Chloride and Zinc Chloride. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1988. [DOI: 10.1246/bcsj.61.4037] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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33
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Solladie-Cavallo A, Suffert J, Gordon M. TiCl4 Induced opening of chiral acetals: a route to β-adrenergic blocking agents. Tetrahedron Lett 1988. [DOI: 10.1016/0040-4039(88)85056-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Hayashi M, Inubushi A, Mukaiyama T. A Convenient Method for the Preparation of Secondary Propargylic Ethers. The Reaction of Acetals with 1-Trimethylsilylalkynes Promoted by the Combined Use of Catalytic Amounts of Tin(IV) Chloride and Zinc Chloride. CHEM LETT 1987. [DOI: 10.1246/cl.1987.1975] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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35
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Seebach D, Imwinkelried R, Stucky G. Optisch aktive Alkohole aus 1,3-Dioxan-4-onen: eine praktikable Variante der enantioselektiven Synthese unter nucleophiler Substitution an Acetal-Zentren. Helv Chim Acta 1987. [DOI: 10.1002/hlca.19870700226] [Citation(s) in RCA: 94] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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36
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Kobayashi K, Kato T, Masuda S. Asymmetric Synthesis of Silicon Compounds Using Chiral 5,6-Dimethoxy-1,3,2-dioxasilacycloheptane Derivatives. CHEM LETT 1987. [DOI: 10.1246/cl.1987.101] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Snider BB, Burbaum BW. Lewis Acid Induced Asymmetric Prins Reactions of Chiral Acetals with Alkenes. SYNTHETIC COMMUN 1986. [DOI: 10.1080/00397918608056395] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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38
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Reductive cleavages of α, β-alkynyl acetals. New route to optically pure propargylic alcohols. Tetrahedron Lett 1986. [DOI: 10.1016/s0040-4039(00)84155-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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39
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Schreiber SL, Reagan J. On the preparation of optically active secondary alcohols from a 1,3-dioxan-4-one: Substitution with organocopper reagents. Tetrahedron Lett 1986. [DOI: 10.1016/s0040-4039(00)84686-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Seebach D, Imwinkelried R, Weber T. EPC Syntheses with C, C Bond Formation via Acetals and Enamines. ACTA ACUST UNITED AC 1986. [DOI: 10.1007/978-3-642-82805-8_4] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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42
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Maruoka K, Yamamoto H. Selective Reactions Using Organoaluminum Reagents [New Synthetic Methods (54)]. ACTA ACUST UNITED AC 1985. [DOI: 10.1002/anie.198506681] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Asymmetric synthesis via chiral acetal templates. 8. Reactions with organometallic reagents. Tetrahedron Lett 1984. [DOI: 10.1016/0040-4039(84)80037-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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45
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Mori A, Maruoka K, Yamamoto H. Nucleophilic cleavages of acetals using organotitanium reagents. A new synthesis of chiral alcohols. Tetrahedron Lett 1984. [DOI: 10.1016/s0040-4039(01)81455-6] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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46
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Choi VM, Elliott JD, Johnson WS. Asymmetric synthesis via chiral acetal templates. 7. Further studies on the cyanation reaction. The use of acetals derived from diols with one chiral center. Tetrahedron Lett 1984. [DOI: 10.1016/s0040-4039(00)99946-5] [Citation(s) in RCA: 73] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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47
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Johnson WS, Crackett PH, Elliott JD, Jagodzinski JJ, Lindell SD, Natarajan S. Asymmetric synthesis via acetal templates. 9. Further studies of the allylation reaction. Preparation of (−)-dihydromyoporone. Tetrahedron Lett 1984. [DOI: 10.1016/0040-4039(84)80038-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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48
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Sayo N, Azuma KI, Mikami K, Nakai T. Acyclic stereocontrol via asymmetric [2,3]-Wittig rearrangement with high enantio- and erythro-selectivity and its use in the chiral synthesis of insect pheromones. Tetrahedron Lett 1984. [DOI: 10.1016/s0040-4039(00)99939-8] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mori A, Fujiwara J, Maruoka K, Yamamoto H. Asymmetric reduction of ketone reductive cleavage of chiral acetals using organoaluminum reagents. Tetrahedron Lett 1983. [DOI: 10.1016/s0040-4039(00)85961-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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