Synthesis of some 4H,10H[1]benzoxepino[3,4‐c]pyrazol‐4‐one derivatives

Abstract

1H(or 2H)4H10H[1]Benzoxepino[3,4‐c]pyrazol‐4‐ones were prepared from phenoxymethylpyrazolecarboxylic acids which in turn were synthesized from simple starting materials. Different pathways to allow the predominant formation of the N‐1 or N‐2 substituted derivatives are described. The isomeric 1 or 2‐substituted structures were supported by 13C‐nmr.

Réactivité de β‐énaminones cycliques. II. Cyclocondensation directe d'amidines, d'hydrazines et de l'hydroxylamine sur la pyrrolidinométhylène‐3 chromanone‐4

“…Ces rCsultats ainsi que diffkrents travaux sur les /3-Cnaminocktones linkaires [13][14][15][16][17] nous ont incitCs B utiliser les aminornCthyl6ne-3 chromanones-4 comme intermbdiaires pour la synthese de tous ces compos6s.…”