Synthesis of allyl-aziridines from α-halo oxime ethers and allyl zinc bromides
作者:Songlin Zheng、Songlin Zhang
DOI:10.1039/c5ra26394h
日期:——
A novel method for the preparation of substituted allyl aziridines by reaction of α-halo with allylic zinc reagents in mild conditions is reported in this paper. The present method complements the existing synthetic methods due to some advantages offered by the use of organozinc reagents, which are easily prepared, relatively stable and non-toxic, and more selective than Grignard reagents.
Stannyl Radical Addition-Cyclization of Oxime Ethers Connected with Olefins
作者:Hideto Miyabe、Hirotaka Tanaka、Takeaki Naito
DOI:10.1248/cpb.52.74
日期:——
Stannyl radical addition-cyclization of oxime ethers connected with olefin moieties was studied. The radical reactions proceeded effectively by the use of triethylborane as a radical initiator to provide the functionalized pyrrolidines via a carbon–carbon bond-forming process.
inhibitors with a higher herbicidal activity, a series of novel N-phenyltriazinone derivatives containing oximeether and oxime ester groups were designed and synthesized based on the strategy of pharmacophore and scaffold hopping. Bioassay results revealed that some compounds showed herbicidal activities; especially, compound B16 exhibited broad-spectrum and excellent 100% herbicidal effects to Echinochloa
原卟啉原 IX 氧化酶(PPO,EC 1.3.3.4)是发现绿色除草剂的最重要靶标之一。为了寻找具有更高除草活性的新型PPO抑制剂,基于药效基团和支架跳跃策略,设计合成了一系列含有肟醚和肟酯基团的新型N-苯基三嗪酮衍生物。生物测定结果表明,一些化合物具有除草活性;尤其是,化合物B16在37.5 g ai/ha的浓度下对稗草、马唐、狗尾草、苘麻、反枝苋和马齿苋表现出广谱且优异的100%除草效果,与三氟咪嗪相当。烟草PPO( Nt PPO)酶抑制测定表明, B16表现出优异的酶抑制活性,其值为32.14 nM,与三氟咪嗪(31.33 nM)相似。同时,化合物B16对作物(水稻、玉米、小麦、花生、大豆和棉花)的安全性高于剂量为 150 g ai/ha 的三氟咪嗪。而且,分子对接和分子动力学模拟进一步表明B16与Nt PPO具有非常强且稳定的结合。这表明B16可以作为潜在的PPO抑制剂和除草剂候选物在田间应用。