Download PDF
Synthesis 1991; 1991(6): 481-482
DOI: 10.1055/s-1991-26500
paper
© 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.

Phase-Transfer Catalyzed Condensation of 3-Methyl-5-pyrazolone with Carbon Disulfide and Alkyl Bromides

Alfonso Oliva* , Isabel Castro, Christian Castillo, Gerardo León
  • *Instituto de Química, Universidad Católica de Valparaíso Casilla 4059, Valparaíso, Chile
Further Information

Publication History

Publication Date:
29 April 2002 (online)

  PDF Download  Permissions and Reprints All articles of this category

Reaction of 3-methyl-5-pyrazolones with carbon disulfide and alkyl bromides under phase-transfer catalysis to give alkyl 5-hydroxy-3-methyl-1H -pyrazole-4-carbodithioates is described. Using 1,2-dibromoethane or 1,3-dibromopropane, the corresponding cyclic ketene dithioacetals are formed.