Hydroxamic acids: VI. The synthesis, properties and reactions of amidic hydroxamic acid and dihydroxamic acid derivatives

Abstract

Amidic hydroxamic acid and dihydroxamic acid derivatives of maleic, phthalic, fumaric and succinic acids have been prepared and their properties and reactions studied. In particular suitably oriented derivatives of these systems have been investigated to ascertain whether they are capable of existing in, or reacting through, various cyclol tautomers. Attempts to trap the cyclol tautomers are described and these results, together with other indirect chemical evidence as well as the spectral data, suggest that the cyclol tautomer may be present in some cases, in contrast to the corresponding diamides which do not show similar behaviour.