Carbolines

Synthesis of Pyrazoleacrylic Acids and Their Derivatives

“…Recently, a review on 1,3-diarylpyrazol-4-carbaldehyde has appeared in literature 12 . Some of these aldehydes have previously been condensed with various substrates such as acetophenones 7,13 , 4-acetylpyrazole 14 , pyruvic acid 15 , hippuric acid 16 , malonic acid 7,17 , indole-3-acetonitrile 18 and benzopyrillium salts 19 .…”