The preparation of α-alkylidene-γ-butyrolactones using a telescoped intramolecular Michael/olefination (TIMO) sequence:: Synthesis of (+)-paeonilactone B
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作者:
Edwards, Michael G.
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Univ York, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUniv York, Dept Chem, York YO10 5DD, N Yorkshire, England
Edwards, Michael G.
[1
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Kenworthy, Martin N.
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Univ York, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUniv York, Dept Chem, York YO10 5DD, N Yorkshire, England
Kenworthy, Martin N.
[1
]
Kitson, Russell R. A.
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Univ York, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUniv York, Dept Chem, York YO10 5DD, N Yorkshire, England
Kitson, Russell R. A.
[1
]
Perry, Alexis
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Univ York, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUniv York, Dept Chem, York YO10 5DD, N Yorkshire, England
Perry, Alexis
[1
]
Scott, Mark S.
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Univ York, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUniv York, Dept Chem, York YO10 5DD, N Yorkshire, England
Scott, Mark S.
[1
]
Whitwood, Adrian C.
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Univ York, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUniv York, Dept Chem, York YO10 5DD, N Yorkshire, England
Whitwood, Adrian C.
[1
]
Taylor, Richard J. K.
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Univ York, Dept Chem, York YO10 5DD, N Yorkshire, EnglandUniv York, Dept Chem, York YO10 5DD, N Yorkshire, England
Taylor, Richard J. K.
[1
]
机构:
[1] Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England
tandem reactions;
phosphonates;
Michael addition;
Horner-Wadsworth-Emmons;
lactones;
D O I:
10.1002/ejoc.200800558
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
A novel telescoped intramolecular Michael addition/proton transfer/HWE olefination sequence has been developed to provide rapid access to alpha-alkylidene-gamma-butyrolactones. This methodology has been applied to prepare a range of tetrahydrobenzofuran-2,5-diones, and related systems, and also utilised in an extremely short synthesis of the natural product (+)-paeonilactone B in enantiomerically pure form. In addition, preliminary experiments are described that illustrate a palladium-catalysed variant proceeding by way of a pi-allyl intermediate. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).
机构:
NE Normal Univ, Dept Chem, Changchun 130024, Peoples R ChinaNE Normal Univ, Dept Chem, Changchun 130024, Peoples R China
Yang, Yang
Xiang, Dexuan
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NE Normal Univ, Dept Chem, Changchun 130024, Peoples R ChinaNE Normal Univ, Dept Chem, Changchun 130024, Peoples R China
Xiang, Dexuan
Zhao, Xiaoliang
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NE Normal Univ, Dept Chem, Changchun 130024, Peoples R ChinaNE Normal Univ, Dept Chem, Changchun 130024, Peoples R China
Zhao, Xiaoliang
Liang, Yongjiu
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Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R ChinaNE Normal Univ, Dept Chem, Changchun 130024, Peoples R China
Liang, Yongjiu
Huang, Jie
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NE Normal Univ, Dept Chem, Changchun 130024, Peoples R ChinaNE Normal Univ, Dept Chem, Changchun 130024, Peoples R China
Huang, Jie
Dong, Dewen
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NE Normal Univ, Dept Chem, Changchun 130024, Peoples R China
Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R ChinaNE Normal Univ, Dept Chem, Changchun 130024, Peoples R China
机构:
Indian Inst Chem Technol, Organ Div 3, Hyderabad 500607, Andhra Pradesh, IndiaIndian Inst Chem Technol, Organ Div 3, Hyderabad 500607, Andhra Pradesh, India
Rao, G. Srinivas
Sudhakar, Neela
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Indian Inst Chem Technol, Organ Div 3, Hyderabad 500607, Andhra Pradesh, IndiaIndian Inst Chem Technol, Organ Div 3, Hyderabad 500607, Andhra Pradesh, India
Sudhakar, Neela
Rao, B. Venkateswara
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Indian Inst Chem Technol, Organ Div 3, Hyderabad 500607, Andhra Pradesh, IndiaIndian Inst Chem Technol, Organ Div 3, Hyderabad 500607, Andhra Pradesh, India
Rao, B. Venkateswara
Basha, S. Jeelani
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Indian Inst Chem Technol, Nucl Magnet Resonance Div, Hyderabad 500607, Andhra Pradesh, IndiaIndian Inst Chem Technol, Organ Div 3, Hyderabad 500607, Andhra Pradesh, India