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Issue 0, 1980
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Base catalysed rearrangements involving ylide intermediates. Part 2. The Stevens [1,2] and [3,2] sigmatropic rearrangements of allylic ammonium ylides

Abstract

The base catalysed rearrangement 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 [3,2] sigmatropic rearrangement and the non-allowed Stevens [1,2] rearrangement which is formulated either as proceeding via a radical pair intermediate or as being a concerted symmetry-forbidden process.

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Article information


J. Chem. Soc., Perkin Trans. 1, 1980, 1450-1457
Article type
Paper

Base catalysed rearrangements involving ylide intermediates. Part 2. The Stevens [1,2] and [3,2] sigmatropic rearrangements of allylic ammonium ylides

R. W. Jemison, T. Laird, W. D. Ollis and I. O. Sutherland, J. Chem. Soc., Perkin Trans. 1, 1980, 1450
DOI: 10.1039/P19800001450

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