Cyclopentadienyl-Free Rare-Earth Metal Amides [{(CH<sub>2</sub>SiMe<sub>2</sub>){(2,6-<i>i</i>Pr<sub>2</sub>C<sub>6</sub>H<sub>3</sub>)N}<sub>2</sub>}Ln{N(SiMe<sub>3</sub>)<sub>2</sub>}(THF)] as Highly Efficient Versatile Catalysts for CâC and CâN Bond Formation
作者:Yunjun Wu、Shaowu Wang、Lijun Zhang、Gaosheng Yang、Xiancui Zhu、Zhihong Zhou、Hong Zhu、Shihong Wu
DOI:10.1002/ejoc.200901015
日期:2010.1
Efficient methods have been developed for the direct synthesis of amides from aldehydes and a straightforward route to propiolamidines using cyclopentadienyl-free rare-earth metal amides [(CH 2 SiMe 2 )(2,6-iPr 2 C 6 H 3 )N} 2 }LnN(SiMe 3 ) 2 }-(THF)] [Ln = Yb (1), Y (2), Dy (3), Sm (4), Nd (5)] as versatile catalysts. The results indicate that in the direct synthesis of amides from aldehydes the
已经开发出从醛直接合成酰胺的有效方法和使用不含环戊二烯基的稀土金属酰胺 [(CH 2 SiMe 2 )(2,6-iPr 2 C 6 H 3 )N } 2 }LnN(SiMe 3 ) 2 }-(THF)] [Ln = Yb (1), Y (2), Dy (3), Sm (4), Nd (5)] 作为通用催化剂。结果表明,在醛直接合成酰胺中,催化剂的活性顺序为2>1∼3∼4∼5。这些方法具有催化剂制备容易、催化剂载量低、底物转化产物转化率高、反应条件温和以及与多种底物相容等优点。