Volume 60, Issue 52 pp. 27225-27229
Communication

Precatalyst-Enabled Selectivity: Enantioselective NiH-Catalyzed anti-Hydrometalative Cyclization of Alkynones to Endo- and Heterocyclic Allylic Alcohols

Xiao-Wen Zhang

Xiao-Wen Zhang

Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Rd, Wuhan, 430072 China

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Ming-Hui Zhu

Ming-Hui Zhu

Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Rd, Wuhan, 430072 China

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Hai-Xiang Zeng

Hai-Xiang Zeng

Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Rd, Wuhan, 430072 China

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Qi-Yang Li

Qi-Yang Li

Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Rd, Wuhan, 430072 China

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Prof. Wen-Bo Liu

Corresponding Author

Prof. Wen-Bo Liu

Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Rd, Wuhan, 430072 China

State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Rd, Shanghai, 200032 China

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First published: 09 September 2021
Citations: 27

Graphical Abstract

An unprecedented NiH-catalyzed enantio-, regio-, and anti-selective intramolecular coupling of alkynones to construct O-, N-, S-containing endocyclic allylic alcohols was developed. The choice of metal precursors plays a key role in tuning the regio- and enantio-selectivity. This study offers a new anti-hydrocyclization mode for enantioselective hydrofunctionalization of alkynes.

Abstract

A highly enantioselective NiH-catalyzed hydrocyclization of alkynones with unparalleled anti- and endocyclic selectivities is described. The choice of the precatalysts has significant influence in tuning the regio- and enantioselectivity. Using Ni(OTs)2/Phox as a precatalyst and (EtO)2MeSiH as a hydride source, an array of enantioenriched O-, N-, and S-containing heterocyclic tertiary allylic alcohols are obtained in 24–81 % yields with 80:20–99:1 er. Mechanistic investigations and synthetic application are also carried out. This study represents an efficient access to a set of allylic alcohols that are unable to access by the state-of-the-art coupling reactions.

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