[EN] CHEMICAL PROCESS FOR THE SYNTHESIS OF HERBICIDAL PYRAZOLIDINEDIONE COMPOUNDS<br/>[FR] PROCÉDÉ CHIMIQUE POUR LA SYNTHÈSE DE COMPOSÉS DE PYRAZOLIDINEDIONE HERBICIDES
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2019110613A1
公开(公告)日:2019-06-13
The present invention relates to a novel process for the synthesis of herbicidal pyrazolidinedione compounds. In particular, a process for the preparation of a compound of formula (I), wherein R1, R2 and R3 are as defined herein. The present invention further relates to novel intermediate compounds utilized in said process, and methods for preparing said intermediate compounds.
α,α′‐Bis(arylimino)‐2,3:5,6‐bis(pentamethylene)pyridylcobalt Chlorides: Synthesis, Characterization, and Ethylene Polymerization Behavior
作者:Shizhen Du、Wenjuan Zhang、Erlin Yue、Fang Huang、Tongling Liang、Wen‐Hua Sun
DOI:10.1002/ejic.201600098
日期:2016.4
the cobalt center. On activation with methylaluminoxane or modified methylaluminoxane, all of the complexes exhibited high activity toward ethylene polymerization with activities in the range of 106 g of polyethylene (PE) per mole of Co per hour and produced highlylinear PEs with low molecular weights and narrow polydispersity. The unimodal nature of the PEs indicated single-site active species of these
通过α,α'-二氧代-2,3:5的一锅模板反应合成了一系列α,α'-双(芳基亚氨基)-2,3:5,6-双(五亚甲基)吡啶基氯化钴, 6-双(五亚甲基)吡啶、苯胺和氯化钴在回流的乙酸中。复合物 Co1 的分子结构是通过单晶 X 射线晶体学确定的,它揭示了钴中心周围扭曲的方形锥体几何形状。在用甲基铝氧烷或改性甲基铝氧烷活化时,所有配合物都表现出对乙烯聚合的高活性,其活性范围为每小时每摩尔 Co 106 克聚乙烯 (PE),并产生具有低分子量和窄多分散性的高度线性 PE。PE 的单峰性质表明这些钴催化剂体系的单中心活性物质。
Zukerwanik; Wichrowa, Zhurnal Obshchei Khimii, 1937, vol. 7, p. 632,635
作者:Zukerwanik、Wichrowa
DOI:——
日期:——
Bredereck et al., Chemische Berichte, 1939, vol. 72, p. 1414,1424
作者:Bredereck et al.
DOI:——
日期:——
Riemschneider, R.; Hennig, K., Zeitschrift fur Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, 1984, vol. 39, # 6, p. 835 - 838