Copper(I)-Catalyzed Asymmetric Conjugate 1,6-, 1,8-, and 1,10-Borylation.
Copper(I)-Catalyzed Asymmetric Conjugate 1,6-, 1,8-, and 1,10-Borylation.
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DOI:
10.1002/anie.202016081
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发表时间:
2021-04-19
期刊:
影响因子:
--
通讯作者:
Yin L
中科院分区:
文献类型:
--
作者:
Shi CY;Eun J;Newhouse TR;Yin L
Catalytic asymmetric remote conjugate borylation is challenging as the control of regioselectivity is not trivial, the electrophilicity of remote sites is extenuated, and the remote asymmetric induction away from the carbonyl group is difficult. Herein, catalytic asymmetric conjugate 1,6-, 1,8- and 1,10-borylation was developed with excellent regioselectivity, which delivered α-chiral boronates in moderate to high yields with high enantioselectivity. The produced chiral boronate smoothly underwent oxidation, cross-coupling, and one-carbon homologation to give synthetically versatile chiral compounds in moderate yields with excellent stereoretention. Furthermore, a stereomechanistic analysis was conducted using DFT calculations, which provides insights into the origins of the regioselectivity. Finally, the present 1,6-borylation was successfully applied in an efficient one-pot asymmetric synthesis of (−)-7,8-dihydrokavain. Asymmetric conjugate 1,6-, 1,8-, and 1,10-borylation catalyzed by a copper(I) complex was described, which delivered synthetically versatile α-chiral boronates in moderate yields with excellent regio- and high enantioselectivities.
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