作者:Bing-Tao Guan、Baoli Wang、Masayoshi Nishiura、Zhaomin Hou
DOI:10.1002/anie.201208867
日期:2013.4.15
Cationic half‐sandwich yttrium alkyl complexes catalyze the ortho‐selective benzylic CH addition of dialkyl pyridines to various olefins, such as ethylene, 1‐hexene, styrenes, and 1,3‐conjugated dienes, to afford new alkylated and allylated pyridine derivatives (see scheme; Cp=C5Me5). A cationic half‐sandwich yttrium picolyl species, such as [CpY(2‐CH2‐6‐CH3C5H3N)]+, has been confirmed to be a key
阳离子半三明治式钇钇烷基络合物催化二烷基吡啶向各种烯烃(如乙烯,1-己烯,苯乙烯和1,3-共轭二烯)的邻位选择性苄基CH加成,以提供新的烷基化和烯丙基化的吡啶衍生物(参见方案; Cp = C 5 Me 5)。阳离子半夹心钇吡啶甲基物种,如[CPY(2-CH 2 -6-CH 3 Ç 5 ħ 3 N)] +,已被证实是在这一转变的关键活性物质。