An efficient iridium-catalyzed enantioselective hydrogenation of 2-alkylidene 1,4-benzoxazin-3-ones using our developed iPr-BiphPHOX as a ligand is reported. This method showed good functional group compatibility and delivered the corresponding reduced products in excellent yields (up to 99%) with excellent enantioselectivities (up to 99% ee). The reaction proceeded very well on a gram scale with low catalyst loadings (0.1 mol %), providing the product with no erosion in enantioselectivity. Additionally, three bioactive molecules can be easily obtained from the reduced products.

中文翻译：

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通过铱催化苯并恶嗪酮的对映选择性氢化合成手性 2-取代的 1,4-苯并恶嗪-3-酮

报道了使用我们开发的i Pr-BiphPHOX 作为配体对 2-亚烷基 1,4-苯并恶嗪-3-酮进行有效的铱催化对映选择性氢化。该方法显示出良好的官能团兼容性，并以优异的产率（高达 99%）和优异的对映选择性（高达 99% ee）提供相应的还原产物。该反应在克级规模下以低催化剂负载量（0.1 mol%）进行得非常好，提供了对映选择性没有侵蚀的产物。此外，从还原产物中可以很容易地获得三种生物活性分子。