Highly regio- and enantioselective hydrogenation of conjugated α-substituted dienoic acids was realized for the first time using Trifer–Rh complex, providing a straightforward method for the synthesis of chiral α-substituted γ,δ-unsaturated acids. DFT calculations revealed N⁺H–O hydrogen bonding interaction is formed to stabilize the transition state and the coordination of 4,5-double bond to Rh(III) center would facilitate the reductive elimination process. This hydrogenation provided a gram-scale synthesis of the precursor of sacubitril.

中文翻译：

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共轭α-取代的二烯酸的高度区域和对映选择性加氢。

使用Trifer-Rh配合物首次实现了对共轭α-取代二烯酸的高度区域和对映选择性加氢，为合成手性α-取代的γ，δ-不饱和酸提供了一种简单的方法。DFT计算表明，形成N ⁺ H–O氢键相互作用可稳定过渡态，并且4,5-双键与Rh（III）中心的配位将促进还原消除过程。该氢化提供了沙比特利前体的克级合成。