<i>γ</i>
‐Pyronecarbaldehyde‐Based Practical Asymmetric Catalytic Synthesis of Chiral 2,4‐Dihydroxycarboxylic Acids and
<i>α</i>
‐Hydroxy‐
<i>γ</i>
‐lactones
作者:Maxim V. Smirnov、Alexander S. Kucherenko、Ilya D. Gridnev、Alexander A. Korlyukov、Sergei G. Zlotin
DOI:10.1002/adsc.202200859
日期:2022.9.20
reactions with various aldehydes and ketones in high yield with excellent diastereoselectivity and enantioselectivity. Origins of efficient stereoinduction were revealed by quantum-chemical calculations of four possible transition states. The products were converted to synthetically useful chiral 2,4-dihydroxy carboxylic acid derivatives via protection/deprotection and RuIII-catalyzed oxidative fragmentation
生物质衍生的γ -pyrone-2-carbaldehydes 被提议作为稳健的杂环平台,用于与各种醛和酮以高产率进行有机催化不对称交叉醛醇反应,具有优异的非对映选择性和对映选择性。通过四种可能的过渡态的量子化学计算揭示了有效立体感应的起源。通过保护/去保护和 Ru III将产物转化为合成有用的手性 2,4-二羟基羧酸衍生物-催化的氧化断裂步骤,没有立体中心的外消旋化。开发的方法用于不对称合成手性泛内酯、有价值的生物活性物质前体和天然产物,以及合成右泛醇,一种用于治疗皮肤屏障功能缺陷的药物。