[Rh(S)‐Phanephos(cod)]‐catalyzed hydrogenation of disubstituted (E)‐enol acetate carboxylic acids is reported. The catalytic cycle works under 30 bar of hydrogen under conventional heating giving different 3‐acetoxy‐2,3‐disubstituted carboxylic acids with ee ≥90%. Hydrogenation occurred also under microwave dielectric heating without eroding the enantioselectivity but improving the overall efficiency
据报道,新型铑配合物[Rh(S)-Phanephos(cod)]催化双取代(E)-烯醇乙酸酯羧酸的加氢反应。在氢气的30巴常规加热下催化循环作品给予不同的3-乙酰氧基甲基-2,3-二取代的羧酸与EE ≥90%。在微波介电加热下也发生了加氢反应,而没有削弱对映选择性,但提高了整个过程的效率。对于微波,完全氢化所需的氢气压力和反应时间分别降至5 bar和30分钟。该催化剂在微波辐射下的最佳性能为TON 100,TOF 196 h -1和ee 99%(6-g规模)。
[EN] PROCESS FOR PRODUCING ALISKIREN<br/>[FR] PROCÉDÉ DE PRODUCTION D'ALISKIREN