Iridium-catalyzed regioselective and enantioselective allylation of trimethylsiloxyfuran.
Iridium-catalyzed regioselective and enantioselective allylation of trimethylsiloxyfuran.
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DOI:
10.1021/ja306850b
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发表时间:
2012-09-19
影响因子:
15
通讯作者:
Hartwig JF
中科院分区:
文献类型:
--
作者:
Chen W;Hartwig JF
We report the regioselective and enantioselective allylation of an ester enolate, trimethylsiloxyfuran. This enolate reacts in the 3-position with linear aromatic allylic carbonates or aliphatic allylic benzoates to form the branched substitution products in the presence of a metallacyclic iridium catalyst. This process provides access to synthetically important 3-substituted butenolides in enantioenriched form. Stoichiometric reactions of the allyliridium intermediate imply that the trimethylsiloxyfuran is activated by the carboxylate leaving group.
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