Lithiation of Diamine Ligands to Chiral Building Blocks: Syntheses, Selectivities, and Lithiated Intermediates
作者:Viktoria H. Gessner、Carsten Strohmann
DOI:10.1021/om100035g
日期:2010.4.12
The direct deprotonation of the chiral nitrogen ligands (R,R)-TECDA (2) and (R,R)-TEMCDA (6) with tert-butyllithium to highly reactive building blocks is reported. The regioselectivity of the lithiation reactions can be explained by the isolated precoordinated intermediates such as tBuLi·(R,R)-TECDA in combination with computational studies.
据报道,手性氮配体(R,R)-TECDA(2)和(R,R)-TEMCDA(6)与叔丁基锂直接去质子化成高反应性的结构单元。可以通过分离的预配位中间体如t BuLi·(R,R)-TECDA结合计算研究来解释锂化反应的区域选择性。