Results 261 to 270 of about 1,030,834 (343)

Coulometric HPLC analysis of catecholamines, indoleanines and related metabolites in rat brain and spinal cord

open access: gold, 1988
Hitomi Sugiyama   +5 more
openalex   +1 more source

Electrocatalytic Dehydrogenative Lactonization of Benzylic Alcohols: A Sustainable Access to Phthalides via N‐hydroxyphthalimide Mediation

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A mild, scalable electrocatalytic method for direct lactonization of benzylic alcohols to phthalides using N‐hydroxyphthalimide as a redox mediator is reported. This metal‐free process proceeds via a phthalimide‐N‐oxyl‐mediated hydrogen atom transfer mechanism, shows broad scope with good to excellent yields, and enables late‐stage functionalizations ...
Pietro Ronco   +6 more
wiley   +1 more source

Installation of Trifluoromethylated Quaternary Carbon Stereocenters via Asymmetric Epoxidation of Tetrasubstituted Alkenes

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
The catalytic enantioselective epoxidation of acyclic tetrasubstituted alkenes, bearing a trifluoromethyl group, is reported. In the presence of Takemoto's thiourea organocatalyst and tert‐butyl hydroperoxide, epoxides are obtained with excellent yield and good to high enantioselectivity.
Vincenzo Battaglia   +4 more
wiley   +1 more source

Cooperative Rh2(OAc)4/Chiral Phosphoric Acid‐Catalyzed (3 + 3)‐Cycloadditions of Pyrrole‐3‐Methides and Carbonyl Ylides

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A stereoselective one‐step (3 + 3)‐cycloaddition between in situ generated pyrrole‐3‐methides and carbonyl ylides has been developed using cooperative rhodium and chiral phosphoric acid catalysis. The reaction affords oxa‐bridged cyclohepta[1,2‐b]pyrroles bearing three stereogenic centers, including two quaternary ones, in high yields and ...
Philipp Stehr, Christoph Schneider
wiley   +1 more source

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