Base catalysed rearrangements involving ylide intermediates. Part 2. The Stevens [1,2] and [3,2] sigmatropic rearrangements of allylic ammonium ylides
作者:Robert W. Jemison、Trevor Laird、W. David Ollis、Ian O. Sutherland
DOI:10.1039/p19800001450
日期:——
The basecatalysedrearrangement of the quaternary ammonium salts (9) usually gives the [3,2] sigmatropic rearrangement product (10) rather than the Stevens [1,2] rearrangement product (11). An earlier claim has been corrected : the corresponding reaction of the acetylenic ammonium chloride (16) gives the allene (18). These results are discussed in terms of a competition between the symmetry-allowed