1,3-Li/H Shift of 1-Aryl-1,2-alkadienyl Reagents: An Experimental and Theoretical Study
作者:Nacira Alouane、Kamel Bentayeb、Emmanuel Vrancken、Hélène Gérard、Pierre Mangeney
DOI:10.1002/chem.200801849
日期:2009.1
A‐Li shuffle: Experimental and computational data are employed to elucidate the mechanistic aspects of the 1,3‐lithium shift occurring in the allenyllithium complexes derived from 1‐aryl‐1‐alkynes. A central role is shown to be played by proton donors, resulting in the in situ formation of a transient allene. This highlights the role of water in the reaction mechanism and explains the disconcerting
A-Li混洗:利用实验和计算数据来阐明在从1-芳基-1-炔烃衍生的烯丙基锂络合物中发生的1,3-锂转移的机理。已显示质子供体起着核心作用,导致原位形成瞬态丙二烯。这突出了水在反应机理中的作用,并解释了“无质子”反应程序令人难以置信的不可重复性。