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.