31989-57-8Relevant articles and documents
Combining organometallic and Werner-type coordination sites in highly preorganized heterobimetallic systems
R?der, Jens C,Meyer, Franc,Winter, Rainer F,Kaifer, Elisabeth
, p. 113 - 120 (2002)
A first example of a novel class of preorganized bimetallic complexes is reported, in which both an organometallic CpMn(CO)2 fragment and a classical Werner-type coordination site are arranged in close proximity by means of a bridging pyrazolat
New donor-functionalized Cp ligands: Synthesis and complexation behaviour of quinoxalyl and benzothiadiazolyl systems
Schuhen, Katrin,Sieb, David,Wadepohl, Hubert,Enders, Markus
, p. 1560 - 1567 (2009)
Sodium cyclopentadienide reacts as nucleophile with 4,7-dibromo-2,1,3- benzothiadiazole (BTZ) and leads to the new donorfunctionalized ligand Cp BTZ. Related quinoxalyl Cp systems have been prepared using Pd-catalyzed coupling with zincated Cp-
Diaryltriazenido Palladium(II) complexes derived from 1-(2-bromo-4-ethoxycarbonylphenyl)-3-phenyltriazenes
Preusser, Silvio,Sch?nherr, Paul R.W.,G?rls, Helmar,Imhof, Wolfgang,Krieck, Sven,Westerhausen, Matthias
, (2019/08/07)
1-(2-Bromo-4-ethoxycarbonylphenyl)-3-phenyltriazene (1) can easily be deprotonated yielding the corresponding triazenides of lithium, silver, or triethylammonium. The equimolar metathesis reaction of [(Ph3P)2PdCl2] with th
Pd(η3-1-PhC3H4)(η5- C5H5), an unusually effective catalyst precursor for heck-mizoroki and sonogashira cross-coupling reactions catalyzed by bis-phosphine palladium(0) compounds
Fraser, Andrew W.,Jaksic, Bryan E.,Batcup, Rhys,Sarsons, Christopher D.,Woolman, Michael,Baird, Michael C.
supporting information, p. 9 - 11 (2013/03/13)
The compound Pd(η3-1-PhC3H4) (η5-C5H5) reacts essentially quantitatively with a variety of phosphines L to form cross-coupling catalysts of the type PdL2 and has recently been shown to be a much more effective catalyst precursor for Suzuki-Miyaura cross-coupling reactions in comparison to more commonly utilized precursors such as Pd(PPh3)4, Pd 2(dba)3, and Pd(OAc)2, which do not effectively generate two-coordinate species PdL2. This advantage is expected to apply also to e.g. Heck-Mizoroki and Sonogashira cross-coupling reactions, both of which are generally believed to be catalyzed by species of the type PdL 2. Therefore, comparisons of the efficacies of catalyst systems based on Pd(η3-1-PhC3H4)(η5- C5H5), Pd(PPh3)4, Pd 2(dba)3, and Pd(OAc)2 are made utilizing the conventional coupling reactions of aryl halides with methyl acrylate and styrene for Heck-Mizoroki coupling and with phenylacetylene for Sonogashira coupling. As anticipated, catalyst systems based on Pd(η3-1-PhC 3H4)(η5-C5H5) are found to be significantly more active.
Reactivity of 2-Silyl- and 2-stannyl-substituted phosphirenes
Panichakul, Duanghathai,Lim, Yi Wee,Mathey, Francois
, p. 1985 - 1987 (2010/06/18)
Two methodologies have been tested for the functionalization of phosphirenes. In the first one, the C-Si bond of a 2-silylphosphirene is activated by a substoichiometric quantity of fluoride ion (TBAF) in THF at -78 °C. Using this technique, it is possible to perform a protodesilylation or a functionalization by benzaldehyde. However, at room temperature with a stoichiometry of fluoride, a nucleophilic attack takes place at P, leading to a ring-opened fluorophosphine. Stille cross-coupling with a 2-stannylphosphirene in the presence of [PdL2] as a catalyst leads to an alkynylphosphine by [1,3] migration of tin from C to P.
