No abstract

Reactivity of enaminones derived from various diaminopyridines toward electrophilic carbons (imines, carbodiimides, isocyanates) is reported. The reactions leading to diazepinic or imidazolic ring systems are shown to be dependent of the electrophilic species as well as of the position of the nitrogen atom in the heterocyclic ring.H 7.25 (dd) Reactivity of enaminone (9) : In order to get some informations on the influence of the position of the intracyclic nitrogen on the reactivity of such enaminones, we have investigated the reactivity of the second

No abstract

The synthesis of a biheterocyclic compound containing two pyrazolone sub‐units, precursor of a new macrocyclic family, is described. It is shown that it is necessary to protect first the pyrazol‐5‐one oxygen site before condensing it with a bifunctional compound in order to obtain a selective alkylation on the heterocyclic nitrogen atom.

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