Cyclisation of 4-(m-hydroxyphenyl)butyl toluene-p-sulphonate under basic conditions is shown to occur by the hitherto unreported Ar2–-6 mechanism. Kinetic data are presented which confirm phenyl participation under basic conditions. The corresponding 3-(m-hydroxyphenyl)propyl toluene-p-sulphonate did not cyclise and no evidence could be found for the involvement of an Ar2–-5 mechanism.
P. G. Duggan and W. S. Murphy, J. Chem. Soc., Perkin Trans. 2, 1975, 1054 DOI: 10.1039/P29750001054
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