期刊
CATALYSIS TODAY
卷 418, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.cattod.2023.114056
关键词
Organomanganese; P-ligand; Cyanosilylation; Homogeneous catalysis; Glycerol; DAPTA; Tetrel ?-hole bond
A highly efficient homogeneous catalytic process for the cyanosilylation of aromatic and aliphatic aldehydes in glycerol and under solvent-free conditions has been achieved using a mixture of the organomanganese precursor [CpMe-Mn(CO)3] and the amido-phosphine 3,7-diacetyl-1,3,7-tri-aza-5-phosphabicyclo[3.3.1]nonane (DAPTA). A catalyst loading as low as 0.1 mol % resulted in quantitative conversion of various aldehydes into the corresponding cyanohydrins in 15 min at room temperature. Mechanistic studies suggest a double activation process involving DAPTA as a Lewis base and the in situ generated [CpMe-Mn(DAPTA)(CO)2] organomanganese species as a Lewis acid.
A mixture of the organomanganese precursor [CpMe-Mn(CO)3] and the amido-phosphine 3,7-diacetyl-1,3,7-tri-aza-5-phosphabicyclo[3.3.1]nonane (DAPTA) has been utilized in a highly efficient homogeneous catalytic process for the cyanosilylation of aromatic and aliphatic aldehydes in glycerol and under solvent-free conditions. A catalyst loading as low as 0.1 mol % led to a quantitative conversion of various aldehydes into the corre-sponding cyanohydrins in 15 min at room temperature. Multinuclear NMR and ESI(+)MS analysis revealed a mechanism conceivably evolving via a double activation process where DAPTA acts as a Lewis base and the in situ generated [CpMe-Mn(DAPTA)(CO)2] organomanganese species as a Lewis acid.
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