Half‐Sandwich Guanidinate–Osmium(II) Complexes: Synthesis and Application in the Selective Dehydration of Aldoximes
作者:Javier Francos、Pedro J. González‐Liste、Lucía Menéndez‐Rodríguez、Pascale Crochet、Victorio Cadierno、Javier Borge、Antonio Antiñolo、Rafael Fernández‐Galán、Fernando Carrillo‐Hermosilla
DOI:10.1002/ejic.201501221
日期:2016.1
precursor [OsCl(µ-Cl)(6-p-cymene)}2] (1) with 4 equivalents of the corresponding guanidine (iPrHN)2C=NR (2a–m) at room temperature. The easily separable guanidinium chloride salts [(iPrHN)2C(NHR)]Cl (4a–m) were also formed in these reactions. The structures of 3a, 3d, and 3h were unequivocally confirmed by X-ray diffraction methods. Complexes 3a–m proved to be active in the catalytic dehydration of aldoximes
新型胍盐-锇 (II) 配合物 [OsCl2-(N,N')-C(NR)(NiPr)NHiPr}(6-p-cymene)] [R = Ph (3a), 4-C6H4F ( 3b), 4-C6H4Cl (3c), 4-C6H4CF3 (3d), 3-C6H4CF3 (3e), 3,5-C6H3(CF3)2 (3f), 4-C6H4CN (3g), 4-C6H4Me (3h) , 3-C6H4Me (3i), 2-C6H4Me (3j), 4-C6H4tBu (3k), 2,6-C6H3iPr2 (3l), 2,4,6-C6H2Me3 (3m)] 已以高产率合成 (70 –88 %) 通过使用 4 当量的相应胍 (iPrHN)2C=NR (2a–) 处理二聚体前体 [OsCl(µ-Cl)(6-p-伞花烃)}2] (1) 的 THF 溶液m) 在室温下。在这些反应中也形成了易于分离的氯化胍盐 [(iPrHN)2C(NHR)]Cl