Results 161 to 170 of about 14,649 (249)

Enantioselective Synthesis of 3-Alkyl-1,5-Functionalized 1,4-Diynes via Isoxazol-5(4<i>H</i>)-ones. [PDF]

open access: yesOrg Lett
Torán R   +6 more
europepmc   +1 more source

Barbituric Acids as Nucleophiles in Enantioselective Mannich Reactions: Organocatalytic Access to Quaternary Aminopyrazolone–Barbiturate Adducts

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 15, 1 August 2026.
An enantioselective Mannich reaction using barbituric acids as nucleophiles provides access to chiral heterocycles bearing quaternary stereocenters. The transformation is catalyzed by a bifunctional thiourea with high selectivity. An immobilized catalyst enables recycling and application under continuous‐flow conditions, offering an efficient and ...
Rodrigo Sánchez‐Molpeceres   +4 more
wiley   +1 more source

Biocatalytic Application of Goodfellowiella coeruleoviolacea Imine Reductase: Enantioselective Synthesis of Cyclic Secondary Amines in Deep Eutectic Solvent‐Based Media

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 15, 1 August 2026.
A Goodfellowiella coeruleoviolacea Imine Reductase is here reported as a novel enzyme for biocatalytic application in chiral amine synthesis. Deep eutectic solvents have been used to increase substrate loadings, up to 150 mM, and boost enzymatic activity. Reaction scope and scale‐up procedure showcased the protocol applicability.
Federica De Nardi   +5 more
wiley   +1 more source

Synergistic Mechanism Between Ir–Phosphinito Catalyst and HFIP Enables Asymmetric Hydrogenation of Ketones Under Acidic Conditions

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 15, 1 August 2026.
A cooperative mechanism between a phosphinito Ir complex and HFIP provides a low‐energy pathway for hydrogen activation. This allowed the development of a highly efficient catalytic system for the hydrogenation of ketones that operates under acidic conditions, enabling the reduction of substrates containing phenols and carboxylic acids with no added ...
Martí Sidro   +6 more
wiley   +1 more source

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