A novel and selective synthetic approach for the access of pyrrolo[1,2- a ] imidazol-7-one or pyrrol-3-one
摘要:
A novel and metal-free synthetic method for the formation of pyrrolo[1,2-a]imidazol-7-one or pyrrol-3-one from dihydropyrroloimidazol-6-one through the C-N bond cleavage and formation was achieved. The salient features of this method are operational simplicity, mild reaction conditions, and readily available starting materials. (C) 2016 Published by Elsevier Ltd.
Pyrrole- and Dihydropyrrole-Fused Neonicotinoids: Design, Synthesis, and Insecticidal Evaluation
摘要:
Versatile pyrrole- and dihydropyrrole-fused neonicotinoids were obtained from cyclic and non-cyclic nitroeneamines. Anhydrous aluminum chloride (AlCl3) exhibited high catalytic selectivity for the synthesis of the titled etherified compounds at room temperature and the eliminated products under reflux conditions. The target molecules have been identified on the basis of satisfactory analytical and spectral [H-1 and C-13 nuclear magnetic resonance (NMR), high-resolution mass spectrometry (HAMS), and X-ray] data. All synthesized compounds have been screened for insecticidal activity. The preliminary insecticidal activity results showed that some of the aimed compounds displayed excellent insecticidal activity against cowpea aphids (Aphis craccivora).
[EN] PREPARATION AND USE OF PYRROLE AND DIHYDROPYRROLE FUSED RING COMPOUND HAVING INSECTICIDAL ACTIVITY<br/>[FR] PRÉPARATION ET UTILISATION D'UN COMPOSÉ À CYCLE CONDENSÉ DE PYRROLE ET DE DIHYDROPYRROLE PRÉSENTANT UNE ACTIVITÉ INSECTICIDE
A new strategy for the synthesis of dioxime ether derivatives with nitromethylene imidazolidine
作者:Hui Zeng、Zhengjie Dong、Xinfei Chen、Xusheng Shao、Xiaoyong Xu、Zhong Li
DOI:10.1016/j.tetlet.2015.02.041
日期:2015.3
In the studies on oxime ether derivative synthesis, a serendipitous reactivity of dihydropyrroloimidazol-6-ones has been observed. Instead of expected oxime ethers, a new class of 1,2-dioxime ether derivatives with nitromethylene imidazolidine subunit were prepared in moderate to good yields. In this reaction, the adjacent carbon of carbonyl, but not the carbonyl, was preferentially attacked by oxyamine. The methodology has been applied on a wide range of oxyamine hydrochlorides, such as alkoxyamine hydrochlorides and benzyloxyamine hydrochlorides. (C) 2015 Published by Elsevier Ltd.
Pyrrole- and Dihydropyrrole-Fused Neonicotinoids: Design, Synthesis, and Insecticidal Evaluation
作者:Zhenjun Ye、Lina Shi、Xusheng Shao、Xiaoyong Xu、Zhiping Xu、Zhong Li
DOI:10.1021/jf3044132
日期:2013.1.16
Versatile pyrrole- and dihydropyrrole-fused neonicotinoids were obtained from cyclic and non-cyclic nitroeneamines. Anhydrous aluminum chloride (AlCl3) exhibited high catalytic selectivity for the synthesis of the titled etherified compounds at room temperature and the eliminated products under reflux conditions. The target molecules have been identified on the basis of satisfactory analytical and spectral [H-1 and C-13 nuclear magnetic resonance (NMR), high-resolution mass spectrometry (HAMS), and X-ray] data. All synthesized compounds have been screened for insecticidal activity. The preliminary insecticidal activity results showed that some of the aimed compounds displayed excellent insecticidal activity against cowpea aphids (Aphis craccivora).
A novel and selective synthetic approach for the access of pyrrolo[1,2- a ] imidazol-7-one or pyrrol-3-one
作者:Hui Zeng、Pengtao Yuan、Fukai Wang、Xiaoyong Xu、Xusheng Shao、Zhong Li
DOI:10.1016/j.tetlet.2016.07.055
日期:2016.9
A novel and metal-free synthetic method for the formation of pyrrolo[1,2-a]imidazol-7-one or pyrrol-3-one from dihydropyrroloimidazol-6-one through the C-N bond cleavage and formation was achieved. The salient features of this method are operational simplicity, mild reaction conditions, and readily available starting materials. (C) 2016 Published by Elsevier Ltd.