Results 201 to 210 of about 4,472,736 (328)

Indole based multicomponent reactions towards functionalized heterocycles

open access: yesARKIVOC, 2004
Janos Sapi, Jean-Yves Laronze
doaj   +1 more source

Dynamic site‐interconversion reduces the induction period of methanol‐to‐olefin conversion

open access: yesAIChE Journal, Volume 71, Issue 8, August 2025.
Abstract Reaction–diffusion coupling across the catalyst pore, grain, pellet, and reactor bed has been studied using a particle‐resolved transient microkinetic model applied to temperature‐programmed desorption and step‐response studies of methanol and dimethyl ether conversion over ZSM‐5 catalysts, respectively.
Toyin Omojola
wiley   +1 more source

Asymmetric Aziridination of Allylic Carbamates Using Ion‐Paired Rhodium Complexes and Extrapolation to C─H Amination of Phenethyl Carbamates

open access: yesAngewandte Chemie, EarlyView.
Aziridination of alkenes is an important route to chiral nitrogen‐containing building blocks. We report that carbamate‐functionalized allylic alcohols undergo highly enantioselective aziridination using achiral dimeric Rh complexes ion‐paired with cinchona alkaloid‐derived chiral cations.
Arthur R. Lit   +4 more
wiley   +2 more sources

Deuterated reagents in multicomponent reactions to afford deuterium-labeled products. [PDF]

open access: yesBeilstein J Org Chem
Schofield K   +7 more
europepmc   +1 more source

Comparing exergy and heat pump work in distillation systems

open access: yesAIChE Journal, EarlyView.
Abstract This study compares the exergy supplied to a distillation column with the actual energy consumption of a heat pump‐assisted distillation (HPAD) system. It evaluates the reliability of exergy as a proxy for heat pump work demand in such systems.
Akash Sanjay Nogaja   +2 more
wiley   +1 more source

Evidence for Methylaluminoxane (MAO) Molecular Structure and Reactivity from Ultrahigh Magnetic Field 27Al MAS NMR Spectroscopy Combined with DFT Calculations

open access: yesAngewandte Chemie, EarlyView.
The molecular structure of olefin polymerization activator methylaluminoxane (MAO) was probed using ultrahigh field solid‐state NMR backed with DFT calculations, revealing its key motifs and reactive centers. Abstract The structure and reactivity of methylaluminoxane (MAO), a reagent of major interest for olefin polymerization, both industrially and ...
Kai Szeto   +8 more
wiley   +2 more sources

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