Dynamic kinetic asymmetric transformations of racemic β-halo-α-keto esters through carbonyl-ene reaction were realized using a chiral N,N′-dioxide-nickel(II) complex, giving the corresponding β-halo-α-hydroxy esters containing two vicinal chiral tri- and tetrasubstituted carbon centers in good yields and dr with excellent ee values without the use of extra bases. Meanwhile, a proposed reaction mechanism was presented according to the configuration of the product.

中文翻译：

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通过β卤代α酮酯的动态动力学不对称转化Ñ，Ñ '二氧化物/镍（II） -催化羰基-烯反应†

外消旋β-卤代-α-酮酸酯通过手性N，N'-二氧化物-镍（II）配合物实现了羰基-烯键反应的动态动力学不对称转变，得到了相应的含有两种的β-卤代-α-羟基酯。在不使用额外碱的情况下，邻位手性三和四取代碳中心具有良好的收率，并具有出色的ee值。同时，根据产物的构型提出了一种反应机理。