Total synthesis of auripyrone A using a tandem non-aldol aldol/Paterson aldol process as a key step.

Total synthesis of auripyrone A using a tandem non-aldol aldol/Paterson aldol process as a key step.
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DOI:
10.1002/anie.200904607
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发表时间:
2009
影响因子:
16.6
通讯作者:
Salehi-Rad, Ramin
Salehi-Rad, Ramin
中科院分区:
化学1区
文献类型:
--
作者:
Jung, Michael E.;Salehi-Rad, Ramin

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A tandem non-aldol aldol-Paterson aldol generates the polypropionate 12 from the epoxy alcohol 8 and the ketone 9 in only two steps and 74% overall yield as a single diastereomer, due to double stereodifferentiation, where the stereoinduction from the enolate and the α-methyl substituent of the aldehyde are reinforcing. This compound was used for an efficient synthesis of the natural product auripyrone A, 1, in only 18 steps and 17% overall yield, using a highly regioselective hemiketalization of a keto diol and a late stage spiroketalization onto a stable hemiketal as the final key steps.
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