Convergent Catalytic Asymmetric Synthesis of Esters of Chiral Dialkyl Carbinols.

Convergent Catalytic Asymmetric Synthesis of Esters of Chiral Dialkyl Carbinols.
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DOI:
10.1021/jacs.0c01324
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发表时间:
2020-03-25
影响因子:
15
通讯作者:
Fu GC
Fu GC
中科院分区:
化学1区
文献类型:
--
作者:
Yang ZP;Fu GC

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由于手性二烷基甲醇及其衍生酯在有机化学、药物化学和生物化学等领域中作为中间体和终点是重要的,因此开发其不对称合成的有效方法是一项重要的奋进。在这份报告中,我们描述了一种直接催化对映选择性合成这样的酯的方法,开始与烷基卤(来自醛和酰基溴),烯烃,和氢硅烷,催化镍,地球上丰富的金属。该方法是通用的,容忍大小不同的取代基,并承担一系列的官能团。我们进一步描述了该方法的四组分变体,其中烷基卤化物原位产生,从而避免了分离烷基亲电试剂或烷基金属的需要,同时仍然实现烷基-烷基偶联。最后,我们应用我们的收敛方法,有效的催化对映选择性合成的三个酯是生物活性本身或已被利用在生物活性化合物的合成。
Because chiral dialkyl carbinols, as well as their derived esters, are significant as intermediates and endpoints in fields such as organic, pharmaceutical, and biological chemistry, the development of efficient approaches to their asymmetric synthesis is an important endeavor. In this report, we describe a method for the direct catalytic enantioselective synthesis of such esters, beginning with an alkyl halide (derived from an aldehyde and an acyl bromide), an olefin, and a hydrosilane, catalyzed by nickel, an earth-abundant metal. The method is versatile, tolerating substituents that vary in size and that bear a range of functional groups. We further describe a four-component variant of this process, wherein the alkyl halide is generated in situ, thus obviating the need to isolate either an alkyl electrophile or an alkylmetal, while still effecting an alkyl–alkyl coupling. Finally, we apply our convergent method to the efficient catalytic enantioselective synthesis of three esters that are bioactive themself or that have been utilized in the synthesis of bioactive compounds.
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