Discovery of Novel Pyrazole–Quinazoline-2,4-dione Hybrids as 4-Hydroxyphenylpyruvate Dioxygenase Inhibitors
作者:Bo He、Feng-Xu Wu、Liang-Kun Yu、Lei Wu、Qiong Chen、Ge-Fei Hao、Wen-Chao Yang、Hong-Yan Lin、Guang-Fu Yang
DOI:10.1021/acs.jafc.0c00051
日期:2020.5.6
4-Hydroxyphenylpyruvate dioxygenase (HPPD, EC 1.13.11.27) has been identified as one of the most significant targets in herbicide discovery for resistant weed control. In a continuing effort to discover potent novel HPPD inhibitors, we adopted a ring-expansion strategy to design a series of novel pyrazole-quinazoline-2,4-dione hybrids based on the previously discovered pyrazole-isoindoline-1,3-dione
4-羟基苯基丙酮酸双加氧酶(HPPD,EC 1.13.11.27)已被确定为抗除草剂发现中除草剂中最重要的目标之一。为了不断发现有效的新型HPPD抑制剂,我们采用了扩环策略,以先前发现的吡唑-异吲哚啉-1,3-二酮骨架为基础,设计了一系列新型的吡唑-喹唑啉-2,4-二酮杂化物。一种化合物3-(2-氯苯基)-6-(5-羟基-1,3-二甲基-1H-吡唑-4-羰基)-1,5-二甲基喹唑啉-2,4(1H,3H)-二酮( 9bj)显示出对AtHPPD的出色效价,IC50值为84 nM,比吡草磺酚(IC50 = 1359 nM)高约16倍,而对甲基磺草酮(IC50 = 226 nM)则高2.7倍。此外,AtHPPD-9bj复合物(PDB ID 6LGT)的共晶体结构的分辨度为1.75。与现有的HPPD抑制剂相似,化合物9bj与金属离子形成双齿螯合相互作用,与Phe381和Phe424形成π-π堆积相互