Catalytic Selective Dihydrosilylation of Internal Alkynes Enabled by Rare‐Earth Ate Complex
作者:Wufeng Chen、Haibin Song、Jianfeng Li、Chunming Cui
DOI:10.1002/anie.201913773
日期:2020.2.3
silyl-substituted internal alkynes enabled by a rare-earth atecomplex to yield geminal bis- and tris(silanes), respectively. The lanthanum bis(amido) atecomplex supported by an ene-diamido ligand proved to be the ideal catalyst for this unprecedented transformation, while the same series of yttrium and samarium alkyl and samarium bis(amido) atecomplexes exhibited poor activity and selectivity, indicating
Amino-functionalised diarylphosphide complexes of the alkali metals and lanthanum
作者:Keith Izod、Stephen T. Liddle、William Clegg、Ross W. Harrington
DOI:10.1039/b601938b
日期:——
}M.1/2OEt2 [Ar = mes, M = Na (8), K (9); Ar = Tripp, M = K (10)]. Metathesis reactions between 9 and LaI3(THF)4 give only intractable products; in contrast, a metathesis reaction between 10 and LaI3(THF)4 yields the heteroleptic complex (Tripp)(C6H4-2-CH2NMe2)P}2LaI (11). Compound 11 reacts cleanly with KN(SiMe3)2} to give (Tripp)(C6H4-2-CH2NMe2)P}2LaN(SiMe3)2} (14). Compounds 3-5, 8-11 and 14
A structural investigation of heteroleptic lanthanide substituted cyclopentadienyl complexes
作者:Fabrizio Ortu、Jonathan M. Fowler、Matthew Burton、Alasdair Formanuik、David P. Mills
DOI:10.1039/c5nj00761e
日期:——
The synthesis and structural authentication of novel heteroleptic lanthanide complexes supported by bulky cyclopentadienyl ligands is herein presented. Steric effects play a fundamental role in the coordination motifs.
Synthesis and Characterization of Volatile, Thermally Stable, Reactive Transition Metal Amidinates
作者:Booyong S. Lim、Antti Rahtu、Jin-Seong Park、Roy G. Gordon
DOI:10.1021/ic0345424
日期:2003.12.1
A series of homoleptic metal amidinates of the general type [M(R-R'AMD)(n)](x) (R = (i)Pr, (t)Bu, R' = Me, (t)Bu) has been prepared and structurally characterized for the transition metals Ti, V, Mn, Fe, Co, Ni, Cu, Ag, and La. In oxidation state 3, monomeric structures were found for the metals Ti(III), V(III), and La(III). Bridging structures were observed for the metals in oxidation state 1. Cu(I)
Catalytic Iodination of the Aliphatic C–F Bond by YbI<sub>3</sub>(THF)<sub>3</sub>: Mechanistic Insight and Synthetic Utility
作者:Mario Janjetovic、Andreas Ekebergh、Annika M. Träff、Göran Hilmersson
DOI:10.1021/acs.orglett.6b01022
日期:2016.6.17
A facile iodination protocol of unactivatedalkylfluoridesusing catalytic amounts of YbI3(THF)3 in the presence of iodotrimethylsilane as a stoichiometric fluoride trapping agent is presented. 1H NMR spectroscopy demonstrates a two-step catalytic cycle where TMSI regenerates active YbI3(THF)3. Finally, the catalytic reaction is extended into a one-pot procedure to demonstrate a potential application
提出了在碘代三甲基硅烷存在下使用催化量的YbI 3(THF)3作为化学计量的氟化物捕集剂的未活化烷基氟化物的简便碘化方案。1 H NMR光谱证明了两步催化循环,其中TMSI再生活性YbI 3(THF)3。最后,将催化反应扩展为一锅法,以证明该方法的潜在应用。总体而言,该发现提出了在催化YbI 3(THF)3存在下CF键转化的独特策略。