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以乙酰丙酮、溴乙酸乙酯和2,6-二氯吡啶为起始原料,经取代、肼基化、环合、水解、酸化及缩合等反应,得到9个未见文献报道的吡啶联吡唑乙酰基类化合物B1~B9。其结构均经核磁共振氢谱和质谱表征。初步生物活性测定表明:在150 g/hm~2的处理剂量下,大部分目标化合物表现出一定的除草活性,其中化合物B2、B3、B6和B8对苘麻Abutilon theophrasti Medicus、反枝苋Amaranthus retroflexus和凹头苋Amaranthus lividus L.生长的抑制率接近100%。
Acetylacetone, ethyl bromoacetate and 2,6-dichloropyridine were used as starting materials to prepare 9 new pyridinium bipyridyls which have not been reported in the literature, such as substitution, hydrazinization, cyclization, hydrolysis, acidification and condensation. Oxazole Acetyl Compounds B1-B9. Their structures were characterized by 1H nuclear magnetic resonance and mass spectrometry. The preliminary bioassay showed that most of the target compounds showed some herbicidal activities at the dosage of 150 g / hm ~ 2. Among them, the compounds B2, B3, B6 and B8 showed significant inhibitory activity against Abutilon theophrasti Medicus, Amaranthus retroflexus And amaranth Amaranthus lividus L. growth inhibition rate of nearly 100%.