Abstract
The Reformatsky reagent, derived from the methyl 1-bromocyclohexanecarboxylate and zinc, reacts with N′ -(arylmethylidene)benzohydrazides, to form, as a result of intramolecular cyclization of the initial addition products, N -(1-aryl-3-oxo-2-azaspiro[3.5]nonan-2-yl)benzamides. The structure of the latter was proved by X-ray diffraction analysis. In the case of p -tolualdehyde benzoylhydrazone, the adduct of the Reformatsky reagent to the double carbon-nitrogen bond of the substrate, which not underwent cyclization, was predominantly isolated. The resulting spiroazetidin-2-ones exhibit antinociceptive activity.
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