t-BuLiât-BuOK selectively metalates the benzylic position of 2-phenylethyldimethylamine under mild conditions without occurrence of β-elimination in the resulting metalated species. Theoretical and structural studies indicate that potassium is crucial for both the lowering of the barrier of the initial deprotonation step and the stabilization of the labile anion.
t-BuLi–t-BuOK在温和条件下选择性地
金属化2-苯乙基
二甲胺的苄基位置,且在生成的
金属化物中未发生β-消除反应。理论和结构研究表明,
钾在降低初始去质子化步骤的能垒和稳定不稳定阴离子方面至关重要。