Synthesis, anti-oomycete activity, and SAR studies of paeonol derivatives
Yuee Tian, Di Sun, Xiaoxiao Han, Jin‐Ming Yang, Song Zhang, Nannan Feng, Li‐Na Zhu, Zhongyuan Xu, Zhiping Che, Shengming Liu, Xiaomin Lin, Jia Jiang, Genqiang Chen
Abstract
Three series of sulfonate derivatives of paeonol were synthesized and screened in vitro for their anti-oomycete activity against P. capsici, respectively. Among all the compounds, 4m displayed the best promising and pronounced anti-oomycete activity against P. capsici than zoxamide, with the EC50 values of 24.51 and 26.87 mg/L, respectively. The results show that acetyl and 4-OCH3 are two necessary groups. The existence of these two sites is closely related to the anti-oomycete activity. Relatively speaking, hydroxyl group is well tolerated, and the results showed that after modification of hydroxyl group with sulfonyl, the anti-oomycete activity was significantly increased.