Catalytic Asymmetric Halohydroxylation of α,β‐Unsaturated Ketones with Water as the Nucleophile
作者:Weiwei Li、Pengfei Zhou、Gonglin Li、Lili Lin、Xiaoming Feng
DOI:10.1002/adsc.202000080
日期:2020.5.12
catalytic asymmetric halohydroxylation of α,β‐unsaturated ketones with water as the nucleophile has been realized by applying a chiral N,N′‐dioxide/Fe(OTf)2 complex as the catalyst. Bromo‐, chloro‐ and iodo‐hydroxylations were all suitable in this catalytic system. A variety of α‐halo‐β‐hydroxy ketones were obtained in often good yields with generally high dr and ee values. Besides, a Michael/α‐halogenation
α的不对称催化halohydroxylation,用水β不饱和酮作为亲核试剂已经通过应用手性实现Ñ,N'二氧化物/铁(OTF)2配合物作为催化剂。溴,氯和碘羟基化反应均适用于该催化体系。通常以高收率获得各种α-卤代-β-羟基酮,且其dr和ee值通常较高。此外,认为迈克尔/α-卤化过程更可能,并提出了可能的过渡态模型来解释立体选择性的起源。