Asymmetric ruthenium tricarbonyl cyclopentadienone complexes; synthesis and application to asymmetric hydrogenation of ketones

Asymmetric ruthenium tricarbonyl cyclopentadienone complexes; synthesis and application to asymmetric hydrogenation of ketones
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不对称钌三羰基环戊二烯酮配合物;

DOI:
10.1016/j.ica.2019.119043
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发表时间:
2019
影响因子:
2.8
通讯作者:
Del Grosso A
Del Grosso A
中科院分区:
化学3区
文献类型:
--
作者:
Del Grosso A

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通过C2对称二炔与Ru 3(CO)12的环化反应,合成了一系列对映体纯的三羰基钌环烯酮配合物。四个配合物,其特征在于通过X-射线晶体学和其中之一的氢化物衍生物的特点。在苯乙酮的不对称氢化和转移氢化反应中对配合物进行了测试。虽然催化剂是活性的,但苯乙酮在低ee下被还原,然而当向反应中加入弱碱(iPr 2NEt或吡啶)时,可以获得高达46%ee的还原产物。
A series of enantiomerically-pure ruthenium tricarbonyl cyclopentadienone complexes were prepared via the cyclisation of C2-symmetric dialkynes with Ru3(CO)12. Four complexes were characterised by X-ray crystallography and a hydride derivative of one of these was characterised. The complexes were tested in the asymmetric hydrogenation and transfer hydrogenation of acetophenone. Whilst the catalysts were active, acetophenone was reduced in low ee, however a reduction product of up to 46% ee could be obtained when a mild base (iPr2NEt or pyridine) was added to the reaction.
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