Antimicrobial and antiquorum-sensing activity of<i>Ricinus communis</i>extracts and ricinine derivatives
作者:Mai H. El-Naggar、Abdelaziz Elgaml、Fatma M. Abdel Bar、Farid A. Badria
DOI:10.1080/14786419.2017.1423306
日期:2019.6.3
communis plant, was used as a starting compound for the synthesis of six ricinine derivatives; two new and four known compounds. The new derivatives; 3-amino-5-methyl-1H-pyrazolo[4,3-c]pyridin-4(5H)-one (2), and 3-amino-5-methyl-1-(phenylsulfonyl)-1H-pyrazolo[4,3-c]pyridin-4(5H)-one (3), as well as the previously prepared derivatives (4–7) were subjected for antimicrobial and antiquorum-sensing evaluation
An efficient method for synthesis and demethylation of 3‐cyano‐4‐methoxy‐2‐pyridone derivatives has been developed. DABCO‐induced demethylation can lead to 3‐cyano‐4‐hydroxy‐2‐pyridones in DMF at 90°C with high yield. The protocol is applicable for the synthesis of 3‐cyano‐4‐hydroxy‐2‐pyridone derivatives. The method is simple, efficient, and practical.