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Four‐Coordinated Manganese(II) Disilyl Complexes for the Hydrosilylation of Aldehydes and Ketones with 1,1,3,3‐Tetramethyldisiloxane
ChemCatChem ( IF 4.5 ) Pub Date : 2020-12-01 , DOI: 10.1002/cctc.202001522
Kyoka Saito 1 , Tatsuyoshi Ito 2 , Shogo Arata 3 , Yusuke Sunada 3, 4
Affiliation  

The coordinatively unsaturated manganase(II) bis(supersilyl) complex Mn[Si(SiMe3)3]2(THF)2 (2) was synthesized in one step via the reaction of MnBr2 with two equivalents of KSi(SiMe3)3 in THF. Complex 2 acts as an effective precatalyst for the catalytic hydrosilylation of aldehydes and ketones with 1,1,3,3‐tetramethyldisiloxane (TMDS). The catalytic efficiency can be improved by combining 2 and adamantyl isocyanide (CNAd). The stoichiometric reaction of 2 and two equivalents of CNAd led to the isolation of Mn[Si(SiMe3)3]2(CNAd)2 (3) in high yield. Complex 3 shows superior catalytic performance than 2 in the hydrosilylation of relatively unreactive ketones.

中文翻译:

四配位锰(II)二甲硅烷基配合物,用于醛和酮与1,1,3,3-四甲基二硅氧烷的氢化硅烷化

通过MnBr 2与两当量的KSi (SiMe 33反应,一步合成了配位不饱和锰酶(II)双(超甲硅烷基)配合物Mn [Si(SiMe 33 ] 2(THF)22)。在THF中。配合物2可作为有效的预催化剂,用于将醛和酮与1,1,3,3-四甲基二硅氧烷(TMDS)催化加氢硅烷化。通过结合2和金刚烷基异氰化物(CNAd)可以提高催化效率。2和2当量的CNAd的化学计量反应导致Mn [Si(SiMe 3)的分离3 ] 2(CNAd)23)高产。在相对未反应的酮的氢化硅烷化中,配合物3显示出比2更好的催化性能。
更新日期:2020-12-01
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