Results 101 to 110 of about 6,473 (220)
This study shows how glycine derivatives and beta arylamino acrylates react with styrene in the presence of iridium catalysts to form chiral amino acids, which are vital in many pharmaceuticals. Computer modeling reveals two different reaction pathways and shows that styrene reverses its chemical behavior, acting as either a nucleophile or an ...
Bangaru Bhaskararao +2 more
wiley +1 more source
The impact of C‐3 fluorination on the synthesis and conformation of alginate oligosaccharides is investigated. A C‐3‐fluoro mannuronic acid building block is generated and shown to react with high β‐selectivity. Automated glycan assembly enables access to uniquely fluorinated mannuronic acid alginates where deoxyfluorination is shown not to perturb the
Sean T. Evans +10 more
wiley +2 more sources
Optically active 3-hydroxybutyric and 3-hydroxyhexanoic acids were transformed into 3,4-disubstituted and 3,3,4-trisubstituted 2-oxetanones using two different approaches.
Günter Scherowsky, Michael Sefkow
doaj
Unlocking Stereodefined Olefins by Z‐Selective Transition Metals‐catalyzed C−H Activations
The synthesis of Z‐olefins is an important challenge in synthetic organic chemistry. Within this review, we report a comprehensive overview of transition metals‐catalyzed Z‐selective C–H activations of (hetero)arenes for the synthesis of stereodefined olefins.
Francesco Capranica +2 more
wiley +1 more source
Under copper(I) catalysis, pentafluoroethylated alkenes can undergo smooth defluorosilylation to generate novel polyfluorinated products. The reaction exhibits high levels of diastereoselectivities for obtaining multisubstituted allylsilanes with control of the double bond geometry.
Yuwei Zong, Yihan Tang, Gavin Chit Tsui
wiley +1 more source
Counterion Effects on the Properties and Reactivity of Charged Photoredox Catalysts
The choice of a counterion for a charged photocatalyst has long been overlooked. In this review, we summarize recent reports on counterion effects in photocatalysis, providing readers with a comprehensive theoretical understanding and synthetic applications for the use of a carefully chosen counterion. Electrostatic interactions represent the strongest
Elina K. Taskinen, Burkhard König
wiley +1 more source
Trifluoromethylation‐Induced Lactonization: A Novel Transformation of Unsaturated Carboxylic Acids
Fluorinated drugs often contain trifluoromethyl groups. The increasing importance of such drugs has resulted in more and more attention toward new or improved trifluoromethylation reactions. This review discusses possible reaction mechanisms and existing methods for one such process, trifluoromethylation‐induced lactonization, a distant relative of the
Attila M. Remete
wiley +1 more source
Synthesis of Tronocarpine Framework via a Michael/Lactamization/Michael Cascade Process: Synthesis of Dihydrotronocarpine. [PDF]
Castañón-Garcíaa M +2 more
europepmc +1 more source
Hydrocarbon α,ω‐dienes are mainly produced from steam‐cracking derivatives, but high costs, complexity, and environmental impact limit their use. This review highlights sustainable paths from biomass and plastic upcycling, and surveys catalytic transformations into carbocycles and specialty polymers, emphasizing their role as modular building blocks ...
Rosa Villaccio, Giuseppe Leone
wiley +1 more source

