Download PDF
Synthesis 1989; 1989(4): 320-321
DOI: 10.1055/s-1989-27242
communication
© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved. This journal, including all individual contributions and illustrations published therein, is legally protected by copyright for the duration of the copyright period. Any use, exploitation or commercialization outside the narrow limits set by copyright legislation, without the publisher's consent, is illegal and liable to criminal prosecution. This applies in particular to photostat reproduction, copying, cyclostyling, mimeographing or duplication of any kind, translating, preparation of microfilms, and electronic data processing and storage.

Reinvestigation of the Reaction of 3-Hydroxy-2-methyl-1-aryl-1-propanones and Related Compounds with Hydrazine and Carboxylic Acids

Giorgio Cignarella* , Daniela Barlocco, Maria Michela Curzu, Gérard Aimé Pinna
  • *Istituto Chimico Farmaceutico e Tossicologico, Università di Milano, Viale Abruzzi 42, I-20131 Milano, Italy
Further Information

Publication History

Publication Date:
17 September 2002 (online)

  PDF Download  Permissions and Reprints All articles of this category

The reaction between the title compounds and hydrazine hydrate in an appropriate carboxylic acid gave 1-acyl/aroyl-3-aryl-4-methyl-4,5-dihydropyrazoles 9, instead of 2,5,6-trisubstituted 6,7-dihydro-1,3,4-oxadiazepines as previously reported. Evidence is presented for the attribution of the correct structure and for the reaction mechanisms involved.