Irreversible endo-selective diels-alder reactions of substituted alkoxyfurans: a general synthesis of endo-cantharimides.

Irreversible endo-selective diels-alder reactions of substituted alkoxyfurans: a general synthesis of endo-cantharimides.
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DOI:
10.1002/chem.201406286
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发表时间:
2015-04-13
影响因子:
4.3
通讯作者:
Sheppard, Tom D.
Sheppard, Tom D.
中科院分区:
化学2区
文献类型:
--
作者:
Foster, Robert W.;Benhamou, Laure;Porter, Michael J.;Bucar, Dejan-Kresimir;Hailes, Helen C.;Tame, Christopher J.;Sheppard, Tom D.

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The [4+2] cycloaddition of 3-alkoxyfurans with N-substituted maleimides provides the first general route for preparing endo-cantharimides. Unlike the corresponding reaction with 3H furans, the reaction can tolerate a broad range of 2-substitued furans including alkyl, aromatic, and heteroaromatic groups. The cycloaddition products were converted into a range of cantharimide products with promising lead-like properties for medicinal chemistry programs. Furthermore, the electron-rich furans are shown to react with a variety of alternative dienophiles to generate 7-oxabicyclo[2.2.1]heptane derivatives under mild conditions. DFT calculations have been performed to rationalize the activation effect of the 3-alkoxy group on a furan Diels–Alder reaction.
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