The reaction of a g,g,g-trifluoro-b-(p-methoxyphenylamino) sulfoxide with trifluoroacetic anhydride under Pummerer conditions occurs in an abnormal fashion, providing an excellent yield of the cyclic six-membered sulfonium salt arising from intramolecular interception of the usual trifluoroacetoxy-sulfonium intermediate by the electron rich p-methoxyphenyl group.
Unusual Trifluoroacetic Anhydride Promoted Fragmentation of a g,g,g-Trifluoro-b-(p-methoxyphenylamino) Sulfoxide
CRUCIANELLI, MARCELLO;
1997
Abstract
The reaction of a g,g,g-trifluoro-b-(p-methoxyphenylamino) sulfoxide with trifluoroacetic anhydride under Pummerer conditions occurs in an abnormal fashion, providing an excellent yield of the cyclic six-membered sulfonium salt arising from intramolecular interception of the usual trifluoroacetoxy-sulfonium intermediate by the electron rich p-methoxyphenyl group.File in questo prodotto:
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