Enantioselective and Diastereodivergent Allylation of Propargylic C-H Bonds.

Enantioselective and Diastereodivergent Allylation of Propargylic C-H Bonds.
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DOI:
10.1021/jacs.2c07297
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发表时间:
2022-08-31
影响因子:
15
通讯作者:
Wang, Yi-Ming
Wang, Yi-Ming
中科院分区:
化学1区
文献类型:
--
作者:
Zhu, Jin;Wang, Yidong;Charlack, Aaron D.;Wang, Yi-Ming

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An iridium-catalyzed stereoselective coupling of allylic ethers and alkynes to generate 3,4-substituted 1,5-enynes is reported. Under optimized conditions, the coupling products are formed with excellent regio-, diastereo-, and enantioselectivities, and the protocol is functional group tolerant. Moreover, we report conditions that allow the reaction to proceed with complete reversal of diastereoselectivity. Mechanistic studies are consistent with an unprecedented dual role for the iridium catalyst, enabling the propargylic deprotonation of the alkyne through π-coordination, as well as the generation of a π-allyl species from the allylic ether starting material.
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