1,3,5-Tris(thiocyanatomethyl)mesitylene as a Ligand. Pseudooctahedral Molybdenum, Manganese, and Rhenium Carbonyl Complexes and Copper and Silver Dimers. Copper-Catalyzed Carbene- and Nitrene-Transfer Reactions
作者:Héctor Martínez-García、Dolores Morales、Julio Pérez、Marcos Puerto、Daniel Miguel
DOI:10.1021/ic1006082
日期:2010.8.2
New molybdenum(0), molybdenum(II), manganese(I), rhenium(I), silver(I), and copper(I) complexes with the 1,3,5-tris(thiocyanatomethyl)mesitylene [Ms(CH2SCN)3] ligand have been synthesized and characterized by IR, NMR, and by X-ray diffraction (except for the rheniumcomplex). The Ms(CH2SCN)3 ligand coordinated with the molybdenum, manganese, and rheniumcarbonyl fragments as a tripodal chelate. With
Synthesis of new copper(<scp>i</scp>) complexes with tris(2-pyridyl) ligands. Applications to carbene and nitrene transfer reactions
作者:Julio Pérez、Dolores Morales、Luis A. García-Escudero、Héctor Martínez-García、Daniel Miguel、Pablo Bernad
DOI:10.1039/b812604f
日期:——
New copper(I) complexes with tris(2-pyridyl)methane (TPC), tris(2-pyridyl)methoxymethane (TPM) and tris(2-pyridyl)amine (TPN) ligands have been synthesized and characterized, including structural determinations by X-ray diffraction of some examples. Their activity as catalysts in carbene and nitrenetransferreactions was studied.
Structural Effects on the Rh<sup>II</sup>-Catalyzed Rearrangement of Cyclopropenes
作者:Paul Müller、Christian Gränicher
DOI:10.1002/hlca.19930760134
日期:1993.2.10
The thermocatalytic rearrangement of 2-alkylcycloprop-2-ene-1-carboxylates (1) in the presence of RhII perfluorobutyrate is regio- and stereospecific and leads to the substituted metallocarbenes 3. The latter undergo intramolecular CH bond insertion to form cyclopentylidenes (4). In contrast, the metallocarbenes 19, derived from 2,3-dialkylcycloprop-2-ene-1-carboxylates 6c, d, react to dienes (Z)-20
Rh(II)-Catalyzed Isomerizations of Cyclopropenes Evidence for Rh(II)-Complexed Vinylcarbene Intermediates
作者:Paul Müller、Nicole Pautex、Michael P. Doyle、Vahid Bagheri
DOI:10.1002/hlca.19900730513
日期:1990.8.8
The thermocatalytic rearrangements of cyclopropenes 1-4 have been investigated in the presence of Rh(IT) perfiuorobutyrate. 1, 2, 3-Triphenylcyclopropene (1a) undergoes rearrangement lo diphenylindene 5a or, with alkoxycyclopropene derivatives, to α, β-unsaturated ketone 6. Furan formation occurs with 2, 3-diphenylcyclo-propenecarboxylate 2, but the diethyl counterpart 3 rearranges to dienoate 8. 2-
Hydrotris(3-mesitylpyrazolyl)borato-copper(i) alkyne complexes: synthesis, structural characterization and rationalization of their activities as alkyne cyclopropenation catalysts
作者:Carmen Martín、Marta Sierra、Eleuterio Alvarez、Tomás R. Belderrain、Pedro J. Pérez
DOI:10.1039/c2dt11951j
日期:——
The use of the bulky hydrotris(3-mesitylpyrazolyl)borate anionic ligand has allowed the synthesis of stable TpMsCu(alkyne) complexes (alkyne = 1-hexyne, 1, phenylacetylene, 2, and ethyl propiolate, 3). The spectroscopic and structural features of these compounds and their relative reactivity have been examined, indicating the existence of a low π back-bonding from the copper(I) centre to the alkyne. Ligand exchange experiments have shown that terminal alkyne adducts are more stable than internal alkyne analogues. In good accordance with this, the previously reported alkyne cyclopropenation reaction catalysed by the TpxCu complexes can be rationalized and correlated with their relative stability.