Synthesis, characterization and reactivity of new complexes of titanium and zirconium containing a potential tridentate amidinato-cyclopentadienyl ligand
作者:Valerio Bertolasi、Rita Boaretto、Michele R. Chierotti、Roberto Gobetto、Silvana Sostero
DOI:10.1039/b709923a
日期:——
[Ti(eta(5)-C(5)Me(4)SiMe(2)-eta(1)-N-2R)(NMe(2))(2)] (R = pyridine, pyrazine, pyrimidine, thiazole) were determined by single crystal X-ray diffraction studies. All compounds exhibit a distorted tetrahedral geometry, with the ansa-monocyclopentadienyl-amido ligands acting in a bidentate mode. The [M(eta(5)-C(5)Me(4)SiMe(2)-eta(1)-N-2R)(NMe(2))(2)] (R = pyridine, thiazole; M = Zr, Ti) complexes are ethylene
第4组金属配合物[M(eta(5)-C(5)Me(4)SiMe(2)-eta(1)-N-2R)(NMe(2))(2)](R =吡啶,吡嗪合成并通过元素分析,溶液(1)H,(13)C和( 15)N NMR光谱和固态的实验(13)C和(15)N CPMAS。[Ti(eta(5)-C(5)Me(4)SiMe(2)-eta(1)-N-2R)(NMe(2))(2)的晶体结构(R =吡啶,吡嗪(嘧啶,噻唑)通过单晶X射线衍射研究确定。所有化合物均表现出扭曲的四面体几何形状,其中ansa-单环戊二烯基-酰胺基配体以双齿模式起作用。[M(eta(5)-C(5)Me(4)SiMe(2)-eta(1)-N-2R)(NMe(2))(2)](R =吡啶,噻唑; M =锆
Microwave-Assisted Catalytic Intermolecular Hydroamination of Alkynes
microwave technology, it is possible to achieve turnover frequencies TOF > 10 h−1. Furthermore, when Cp2TiMe2 is used as the catalyst, hydroamination products of terminal alkynes can be isolated in reasonable yields for the first time. The addition of amines to terminal alkynes gives access to both the Markovnikov and the anti-Markovnikov products. Observed regioselectivities are different for terminal