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https://doi.org/10.15255/KUI.2003.027
Published: Kem. Ind. 53 (7-8) (2004) 339–441
Paper reference number: KUI-27/2003
Paper type: Conference paper
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A Convenient Preparation of 5-(trifluoromethyl)dipyrromethanes

W. Dmowski, K. Piasecka-Maciejewska and Z. Urbanczyk-Lipkowska

Abstract

Sodium dithionite initiated reactions of pyrrole and 1-methylpyrrole with 1-bromo-1-chloro- 2,2,2-trifluoroethane in an acetonitrile-water solution provide the respective 5-(trifluoromethyl) dipyrromethanes (1) and (3) as main products in 40 – 58 % isolated yields and of high purity. Small amounts of tripyrranes (2) and (4) are also formed and could be isolated from the reaction mixtures.


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Keywords

5-(trifluormetil)dipirometan, piroli, 1-brom-1-klor-2,2,2-trifluoretan, natrijev ditionit