Maria Batuecas

University of Zaragoza | UNIZAR · Department of Inorganic Chemistry

Selective reactions that combine H 2 , CO and organic electrophiles (aldehyde, ketones, isocyanide) to form hydrogenated C 3 and C 4 carbon chains are reported. These reactions proceed by CO homologation mediated by [W(CO) 6 ] and an aluminum(I) reductant, followed by functionalization and hydrogenation of the chain ends. A combination of kinetics...

Selective reactions that combine H 2 , CO and organic electrophiles (aldehyde, ketones, isocyanide) to form hydrogenated C 3 and C 4 carbon chains are reported. These reactions proceed by CO homologation mediated by [W(CO) 6 ] and an aluminum(I) reductant, followed by functionalization and hydrogenation of the chain ends. A combination of kinetics...

Selective reactions that combine H2, CO and organic electrophiles (aldehyde, ketones, isocyanide) to form hydrogenated C3 and C4 carbon chains are reported. These reactions proceed by CO homologation mediated by [W(CO)6] and an aluminum(I) reductant, followed by functionalization and hydrogenation of the chain ends. A combination of kinetics (rates...

Over the past few decades, numerous model systems have been discovered that create carbon-carbon bonds from CO. These reactions are of potential relevance to the Fischer-Tropsch process, a technology that converts syngas (H2/CO) into mixtures of hydrocarbons. In this paper, a homogeneous model system that constructs carbon chains from CO is reporte...

Over the past few decades, numerous model systems have been discovered that create carbon–carbon bonds from CO. These reactions are of potential relevance to the Fischer-Tropsch (F-T) process, a technology that converts syngas mixtures (H2/CO) into mixtures of hydrocarbons. In this paper, a new homogeneous model system that constructs carbon chains...

Over the past few decades, numerous model systems have been discovered that create carbon–carbon bonds from CO. These reactions are of potential relevance to the Fischer-Tropsch (F-T) process, a technology that converts syngas mixtures (H2/CO) into mixtures of hydrocarbons. In this paper, a new homogeneous model system that constructs carbon chains...

We present herein the application of a lithium anthraquinoid in the catalytic synthesis of cyclic PLA, showing that the aggregation plays a critical role in cyclic vs. linear selectivity.

C–H functionalisation is one of the cornerstones of modern catalysis and remains a topic of contemporary interest due its high efficiency and atom-economy. Among these reactions, C–H borylation, that is the transformation of C–H to C–B bonds, has experienced a fast development because of the wide utility of organoboron reagents as synthetic interme...

The first catalytic asymmetric direct C-H arylation of (n6-arene)-chromium complexes to obtain planar-chiral compounds is report-ed. The use of the hemilabile ligand H8-BINAP(O) is key to providing high enantioselectivity in this transformation. We show that this methodology opens the door to the synthesis of a variety of planar-chiral chromium der...

A strategy for assembling biaryls linked via a medium-sized ring is herein presented. π-Complexation of fluoroarenes to chromium tricarbonyl activates the molecule towards both C-H activation and nucleophilic aromatic substitution without covalently altering the molecular connectivity of the arene. The construction of bridged biaryl molecules with...

The aromatic osmacyclopropenefuran bicycles [OsTp{κ3-C1,C2,O-(C1H2C2CHC(OEt)O)}(PiPr3)]BF4 (Tp=hydridotris(1-pyrazolyl)borate) and [OsH{κ3-C1,C2,O-(C1H2C2CHC(OEt)O)}(CO)(PiPr3)2]BF4, with the metal fragment in a common vertex between the fused three- and five-membered rings, have been prepared via the π-allene intermediates [OsTp(η2-CH2=CCHCO2Et)(O...

The aromatic osmacyclopropenefuran bicycles [OsTp{κ3-C1,C2,O-(C1H2C2CHC(OEt)O)}(PiPr3)]BF4 (Tp=hydridotris(1-pyrazolyl)borate) and [OsH{κ3-C1,C2,O-(C1H2C2CHC(OEt)O)}(CO)(PiPr3)2]BF4, with the metal fragment in a common vertex between the fused three- and five-membered rings, have been prepared via the π-allene intermediates [OsTp(η2-CH2=CCHCO2Et)(O...

α-Brominated ketones and aldehydes, with two adjacent electrophilic carbon atoms, are highly valuable synthetic intermediates in organic synthesis, however, their synthesis from unsymmetrical ketones is very challenging, and current methods suffer from low selectivity. We present a new, reliable, and efficient method for the synthesis of α-bromocar...

The complex [Ru(eta(5)-C5H5)(Co)(K-1-OCMe2)(PiPr(3))] BF4 (1) reacts with 3,3-bis(methoxycarbony1)-5-hexyn-1-al to give the alpha,beta-unsaturated cydopenteritylhydrolcarbene derivative [Ru(eta(5)-C5H5){=C (OH)C=CHCH2C(CO2CH3)(2)CH2}-(CO) (PiPr(3)) (2), which undergoes deprotonation with Al2O3 to afford Ru(eta(5)-C5H5){=C (OH)C=CHCH2C(CO2CH3)(2)CH2...

The first transition-metal oxetylidene complex has been prepared by reaction of OsCl(eta(5)-C5H5)(CO)((PPr3)-Pr-i) with 3,3-di(methoxycarbonyl)-5-hexyn-1-al and AgBF4. This novel compound is transformed into a hydroxyalkenylcarbene isomer by deprotonation and subsequent protonation of the resulting alpha,beta-unsaturated acyl transient species. In...

Ringschluss unter Wasserverlust: Fünf- und sechsgliedrige Ringe sind durch eine einfache dehydratisierende Cyclisierung endständiger Alkinale in Gegenwart von Osmium-, Iridium- oder Rhodium-Vorstufen zugänglich (siehe Schema).

Complexes [MCl2(η6-p-cymene)]2 (M = Os (1a), Ru (1b)) react with Li(C5H4CH2CH2NHMe) (LiCpN) and KPF6 to give the sandwich derivatives [M(η5-CpN)(η6-p-cymene)]PF6 (M = Os (2a), Ru (2b)). Treatment of 2a and 2b with (2,2′-biphenol)PCl leads to [M(η5-CpP)(η6-p-cymene)]PF6 (M = Os (3a), Ru (3b); CpP = C5H4CH2CH2N(Me)P(2,2′-biphenol)). The photolysis of...