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Pradhan TR, Mendhekar KL, Mohapatra DK. Synthesis of γ-Acetoxy β-Keto Esters Through Regioselective Hydration of γ-Acetoxy-α,β-alkynoates. J Org Chem 2015; 80:5517-31. [DOI: 10.1021/acs.joc.5b00400] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Tapas R. Pradhan
- Natural Products Chemistry
Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Kishor L. Mendhekar
- Natural Products Chemistry
Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Debendra K. Mohapatra
- Natural Products Chemistry
Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India
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Devi NS, Singh SJ, Singh OM. An efficient transesterification of β-oxodithioesters catalyzed by stannous chloride under solvent-free conditions. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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3
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Yang J, Ji C, Zhao Y, Li Y, Jiang S, Zhang Z, Ji Y, Liu W. BF3·OEt2: An Efficient Catalyst for Transesterification of β-Ketoesters. SYNTHETIC COMMUN 2010. [DOI: 10.1080/00397910903029842] [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]
Affiliation(s)
- Jinhui Yang
- a Key Laboratory of Energy Resources and Engineering , Ningxia University , Yinchuan, Ningxia, China
| | - Congbin Ji
- a Key Laboratory of Energy Resources and Engineering , Ningxia University , Yinchuan, Ningxia, China
| | - Yanmin Zhao
- a Key Laboratory of Energy Resources and Engineering , Ningxia University , Yinchuan, Ningxia, China
| | - Yunfeng Li
- a Key Laboratory of Energy Resources and Engineering , Ningxia University , Yinchuan, Ningxia, China
| | - Shizhi Jiang
- a Key Laboratory of Energy Resources and Engineering , Ningxia University , Yinchuan, Ningxia, China
| | - Zhiwei Zhang
- b College of Chemistry and Chemical Engineering , Ningxia University , Yinchuan, Ningxia, China
| | - Yongqiang Ji
- a Key Laboratory of Energy Resources and Engineering , Ningxia University , Yinchuan, Ningxia, China
- b College of Chemistry and Chemical Engineering , Ningxia University , Yinchuan, Ningxia, China
| | - Wanyi Liu
- a Key Laboratory of Energy Resources and Engineering , Ningxia University , Yinchuan, Ningxia, China
- b College of Chemistry and Chemical Engineering , Ningxia University , Yinchuan, Ningxia, China
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Yadav J, Subba Reddy B, Purnima K, Jhansi S, Nagaiah K, Lingaiah N. The silver salt of 12-tungstophosphoric acid: A mild and selective catalyst for the synthesis of β-ketoesters via C–H insertion. CATAL COMMUN 2008. [DOI: 10.1016/j.catcom.2008.05.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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5
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Qin YC, Stivala CE, Zakarian A. Acyclic stereocontrol in the Ireland-Claisen rearrangement of alpha-branched esters. Angew Chem Int Ed Engl 2007; 46:7466-9. [PMID: 17694517 DOI: 10.1002/anie.200702142] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ying-chuan Qin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA
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Qin YC, Stivala C, Zakarian A. Acyclic Stereocontrol in the Ireland–Claisen Rearrangement of α-Branched Esters. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200702142] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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7
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Zamir LO, Huang L. Synthesis of [16-14C]trichodiene the precursor to trichothecenes. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580311110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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8
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Piunno PA, Watterson JH, Kotoris CC, Krull UJ. Alteration of the selectivity of hybridization of immobilized oligonucleotide probes by co-immobilization with charged oligomers of ethylene glycol. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2004.06.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Yadav J, Subba Reddy B, Eeshwaraiah B, Reddy P. Niobium(V) chloride-catalyzed C–H insertion reactions of α-diazoesters: synthesis of β-keto esters. Tetrahedron 2005. [DOI: 10.1016/j.tet.2004.11.027] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Pandey RK, Deshmukh AN, Kumar P. Synthesis of β‐Keto Esters Promoted by Yttria‐Zirconia Based Lewis Acid Catalyst. SYNTHETIC COMMUN 2004. [DOI: 10.1081/scc-120028644] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Fukuzaki T, Kobayashi S, Hibi T, Ikuma Y, Ishihara J, Kanoh N, Murai A. Studies aimed at the total synthesis of azadirachtin. A modeled connection of C-8 and C-14 in azadirachtin. Org Lett 2002; 4:2877-80. [PMID: 12182578 DOI: 10.1021/ol026260y] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Studies on the connection between the right and left segments of azadirachtin are described. The Ireland-Claisen rearrangement of Li-enolate of the modeled ester with dichlorodimethylsilane in toluene afforded the desired limonoid framework stereoselectively in good yield.
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Affiliation(s)
- Takehiro Fukuzaki
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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Ermolenko MS. A new carbohydrate-based synthetic approach to trichothecenes. Synthesis of a bicyclic BC core of verrucarol from d-galactose. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01366-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lemieux RM, Meyers AI. Asymmetric Synthesis of (−)-Trichodiene. Generation of Vicinal Stereogenic Quaternary Centers via the Thio-Claisen Rearrangement. J Am Chem Soc 1998. [DOI: 10.1021/ja9804159] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- René M. Lemieux
- Contribution from the Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523
| | - A. I. Meyers
- Contribution from the Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523
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Ishihara J, Nonaka R, Terasawa Y, Shiraki R, Yabu K, Kataoka H, Ochiai Y, Tadano Ki KI. Total Synthesis of (-)-Verrucarol(1). J Org Chem 1998; 63:2679-2688. [PMID: 11672137 DOI: 10.1021/jo972309f] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have achieved the total synthesis of (-)-verrucarol, a trichothecene sesquiterpenoid obtained as a hydrolysis product of the naturally occurring verrucarin A. Our total synthesis began with the previously reported enantiomerically pure bicyclic alpha-methylated gamma-lactone, which was prepared from D-glucose. The key steps for the total synthesis were (1) aldol-like carbon-carbon bond formation applied to the starting lactone using a four-carbon aldehyde as an electrophile for introduction of the quaternary stereogenic carbon sharing the B and C-rings of the trichothecene skeleton, (2) Dieckmann cyclization of the derived epsilon-ester lactone for construction of the C-ring equivalent, (3) Barton's decarboxylative oxygenation for conversion of a carboxylic acid functionality in the Dieckmann cyclization product into a hydroxyl group, (4) skeletal enlargement strategy for the crucial trichothecene skeleton construction, and (5) the final stereoselective formation of the exo-epoxy ring at the methylene carbon in the bridge constituting the B and C-rings.
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Affiliation(s)
- Jun Ishihara
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223, Japan
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