Showing papers by "Martin Lutz published in 2012"
TL;DR: Geminal frustrated Lewis pairs are expected to exhibit increased reactivity when the donor and acceptor sites are perfectly aligned, and this is shown for reactions of the nonfluorinated FLP tBu(2)PCH(2), CO(2, and isocyanates and supported computationally.
Abstract: Geminal frustrated Lewis pairs (FLPs) are expected to exhibit increased reactivity when the donor and acceptor sites are perfectly aligned This is shown for reactions of the nonfluorinated FLP tBu2PCH2BPh2 with H2, CO2, and isocyanates and supported computationally
186 citations
TL;DR: An efficient palladium catalyst is presented for the formation of benzylic quaternary stereocenters by conjugate addition of arylboronic acids to a variety of β,β-disubstituted carbocyclic, heterocyclics, and acyclic enones, with good yields.
Abstract: An efficient palladium catalyst is presented for the formation of benzylic quaternary stereocenters by conjugate addition of arylboronic acids to a variety of β,β-disubstituted carbocyclic, heterocyclic, and acyclic enones. The catalyst is readily prepared from PdCl2, PhBOX, and AgSbF6, and provides products in up to 99 % enantiomeric excess, with good yields. Based on this strategy, (−)-α-cuparenone has been prepared in only two steps.
82 citations
TL;DR: The first examples of reactivity at the backbone of a bidentate PN-ligand L1H relevant to N-H activation are described, leading to novel Pd(II) and Cu(I) amido complexes.
Abstract: The first examples of reactivity at the backbone of a bidentate PN-ligand L1H relevant to N–H activation are described, leading to novel PdII and CuI amido complexes. Activation of the PN-ligand backbone led to selective dearomatization of the pyridyl ring structure. In the case of PdII, the intermediate could be efficiently stabilized using PMe3. Selective N–H bond cleavage of e.g. trifluorosulfonylamide resulted in facile formation of mononuclear metal–amido species 2 and 4, which have been crystallographically characterized. Hydrogen-bonding dimerization is observed in these solid state structures. The results obtained with these structurally versatile and reactive scaffolds likely open up new avenues in cooperative catalysis.
55 citations
TL;DR: In this article, the synthesis and characterization of compound L1H, 2-di(tert-butyl)phosphinomethyl-6-methylpyridine, and the first dimeric CuI complex 3 with this novel bidentate NPtBu ligand were described.
51 citations
TL;DR: In this article, four new Ln(III) complexes with furan-2,5-dicarboxylic acid (H2FDA) as a ligand have been synthesized and characterized in the solid state.
18 citations
TL;DR: The application of bis-(thiosemicarbazonato) Zn(II) complexes as building blocks in the construction of supramolecular transition metal assemblies is reported and their coordination behaviour towards pyridylphosphine molecules is investigated.
Abstract: In this paper we report the application of bis-(thiosemicarbazonato) Zn(II) complexes as building blocks in the construction of supramolecular transition metal assemblies. We investigated their coordination behaviour towards pyridylphosphine molecules and found these systems comparable to those based on Zn(porphyrin) and Zn(salphen) complexes. Additionally, catalytic experiments and an in situ high-pressure FTIR study of the supramolecular rhodium hydroformylation catalysts, assembled using the bis-(thiosemicarbazonato) Zn(II) complexes, demonstrate their applicability in supramolecular catalysis and their potential for application in other areas of supramolecular chemistry.
17 citations
TL;DR: In this article, the platinum center of the NCN-pincer platinum cation embedded in the lipase cutinase (cut-1; molecular weight 20.619.3) with various anionic, neutral, and cationic triarylphosphines was studied.
13 citations
TL;DR: In this article, a bis(aryltriazolyl)-extended π-systems, having either the phosphole sulfide (9) or theosphole (10) group as central ring, was explored for the reaction of the two azido moieties with phenyl-, pyridyl- and thienylacetylenes, to give bis(ARYltriaxolyl-extended phospholes 10, having intriguing photophysical and electrochemical properties that vary with the nature of the aromatic end-group.
11 citations
TL;DR: In this paper, the β-ester group of the growing polymer chain is characterized by the coordination of the βester group to the metal, which can be used to characterize the possibly related RhI(cod) species that contain a five-membered chelate ring.
Abstract: The previous mechanistic studies of the Rh-mediated polymerization of carbenes suggests the involvement of organometallic compounds that have been derived from Rh(diene) species that contain a five-membered chelate ring of the type Rh{κ2-C,O-[–CH(COOR)–CH(Pol)–C(OR)=O–]} (Pol = polymer chain), which are characterized by the coordination of the β-ester group of the growing polymer chain to the metal. Herein we present our efforts to characterize the possibly related RhI(cod){κ2-C,O-[–CH(COOR)–CHR′–C(OR)=O–]} (cod = 1,5-cyclooctadiene) species. These structures can be generated by means of olefin exchange with an allyl complex and with the concomitant release of the corresponding 1,3-diene, which is derived from the allyl ligand. The product is unstable and further reacts by means of a bimolecular C–H activation process to form a related dinuclear complex [(cod)Rh(μ-{–CH(COOR)–CH–C(OR)=O–})2Rh(cod)], in which the carbon dianion of the dimethyl or diethyl succinate bridges two Rh(cod) moieties. The complex was synthesized in an independent way and was structurally characterized. We investigated the importance of these complexes in carbene polymerization.
11 citations
TL;DR: A set of substituted tris(pyrazolyl)phosphine oxides (OP(pzx)3) has been prepared in high yield and applied as neutral scorpion-type ligands as discussed by the authors.
8 citations
TL;DR: In this article, a variety of β, β-disubstituted carbocyclic, hetercyclic, and acyclic enones undergo a conjugate addition of arylboronic acids in the presence of an optimized Pd(II)/Ag(I) catalyst.
Abstract: A variety of β,β-disubstituted carbocyclic, heterocyclic, and acyclic enones undergo a conjugate addition of arylboronic acids in the presence of an optimized Pd(II)/Ag(I) catalyst.