96087-99-9Relevant articles and documents
Pyridazines, XXI. - Synthesis, Structure, and Reactivity of 5-Aroyl-4-pyridazinecarboxylic Acid Derivatives
Haider, Norbert,Heinisch, Gottfried,Kurzmann-Rauscher, Inge,Wolf, Martina
, p. 167 - 182 (2007/10/02)
Ketocarboxylic acids 1 are easily transformed into chlorolactones 7, from which the amides 5 and 11a as well as the azides 6 are obtained.Treatment of the esters 2 and 3 at pH > 7 with hydroxylamine or ammonia yields besides the carboxylic acids 13 or 12