Preparation of (Alkaneimidoyl)lanthanides and Their Reactions with Carbonyl Compounds
作者:Masahiro Murakami、Hajime Ito、Yoshihiko Ito
DOI:10.1246/bcsj.69.25
日期:1996.1
isocyanide ensued. (Alkaneimidoyl)cerium(III) could also be prepared by the reaction of dialkylmagnesium with CeCl3 and 2,6-xylyl isocyanide at −45 °C. The thus-prepared (alkaneimidoyl)cerium(III) reacted with a carbonyl compound to afford an addition product, i.e., an α-hydroxy imine. The present reactions for the preparation of (alkaneimidoyl)cerium(III) provide a convenient synthetic equivalent to
研究了(烷亚胺酰基)镧系(III)试剂的制备及其与羰基化合物的反应。在 -78 °C 下,将烷基锂加入到无水镧系元素盐和 2,6-二甲苯基异氰化物在四氢呋喃中的混合物中。在一系列镧系元素盐中,CeCl3 实现了异氰化物的定量转化,得到了橙色的(烷亚胺酰)铈(III)溶液。尽管发现 LaCl3、SmI3 和 Sm(OTf)3 具有高反应性,但异氰化物的多次插入也随之发生。(烷亚氨基)铈(III)也可以通过二烷基镁与CeCl3和2,6-二甲苯基异氰化物在-45℃下反应制备。如此制备的(烷烃亚氨基酰基)铈(III)与羰基化合物反应以提供加成产物,即α-羟基亚胺。