Reaction of (bisimido)niobium(V) complexes with organic azides: [3 + 2] cycloaddition and reversible cleavage of β-diketiminato ligands involving nitrene transfer.

Reaction of (bisimido)niobium(V) complexes with organic azides: [3 + 2] cycloaddition and reversible cleavage of β-diketiminato ligands involving nitrene transfer.
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(双亚氨基)铌(V)络合物与有机叠氮化物的反应:[3 + 2]环加成和涉及氮宾转移的β-二酮亚胺配体的可逆裂解。

DOI:
10.1021/ja413194z
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发表时间:
2014
影响因子:
15
通讯作者:
J. Arnold
J. Arnold
中科院分区:
化学1区
文献类型:
--
作者:
A. Obenhuber;T. Gianetti;Xavier Berrebi;R. Bergman;J. Arnold

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我们描述了不对称铌(V)双(亚胺)2的高度不稳定的乙醚加合物的不寻常的反应性。含有单氮杂丁二烯(MAD)配体的OEt2。该物种在叔丁基或二异丙基苯基叠氮化物处理下进行干净的亚硝基转移,导致与金属中心结合的nacnac配体发生前所未有的重组。与三甲基硅基叠氮或叔丁基叠氮进行相应的反应,可以在N2损失之前分离出两种罕见的中间体;机械研究支持两种不同铌的参与。
We describe the unusual reactivity of a highly labile diethyl ether adduct of an asymmetric niobium(V) bis(imide) 2.OEt2 containing the monoazabutadiene (MAD) ligand. This species undergoes clean nitrene transfer on treatment with tert-butyl- or di-isopropylphenyl azide resulting in the unprecedented reformation of nacnac ligands bound to the metal center. Corresponding reactions with trimethylsilyl- or tert-butyl azide allowed the isolation of two rare intermediates prior to N2 loss; mechanistic studies support the involvement of two different niobium species.
三坐标铁复合物的电子结构和反应性。
DOI: 10.1021/ar700267b
发表时间: 2008-08
影响因子: 18.3
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通讯作者: Holland, Patrick L.
DOI: 10.1002/anie.201007876
发表时间: 2011-01-01
影响因子: 16.6
作者:
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通讯作者: Toste, F. Dean