The mechanisms of n-butyllithium induced β-cleavage of 2-methyltetrahydrofuran and oxepane
作者:Theodore Cohen、Stephen Stokes
DOI:10.1016/s0040-4039(00)61440-5
日期:1993.12
The n-butyllithium induced β-cleavage reactions of 2-methyltetrahydrofuran and oxepane operate via different mechanisms. 2-Methyltetrahydrofuran undergoes an E2 elimination, whilst oxepane undergoes an α,β′-elimination involving initial deprotonation at the α-position followed by a transannular hydrogen transfer.
所述Ñ丁基锂引发2-甲基四氢呋喃的β裂解反应和氧杂环庚烷通过不同的机制进行操作。2-甲基四氢呋喃经历了E2消除,而环氧庚烷经历了α,β'-消除,包括在α-位置进行初始去质子化,然后进行跨环氢转移。