Rearrangement of (1,2,4-Triazol-4-yl)ethanols to (1,2,4-Triazol-1-yl)ethanols
摘要:
The mechanism of rearrangement of beta-hydroxyethyl-(1,2,4-triazoles) has been shown using crossover experiments to be intermolecular and free energy profiles show that reactions are thermodynamically-controlled.
A General Approach to Intermolecular Olefin Hydroacylation through Light‐Induced HAT Initiation: An Efficient Synthesis of Long‐Chain Aliphatic Ketones and Functionalized Fatty Acids
作者:Subhasis Paul、Joyram Guin
DOI:10.1002/chem.202004946
日期:2021.3
hydroacylation protocol applies to a wide array of substrates bearing numerous functional groups and many complex structural units. The reaction proves to be scalable (up to 5 g). Different functionalized fattyacids, petrochemicals and naturally occurring alkanes can be synthesized with this protocol. A radical chain mechanism is implicated in the process.
Synthesis of Aliphatic Ketones from Allylic Alcohols through Consecutive Isomerization and Chelation-Assisted Hydroacylation by a Rhodium Catalyst
作者:Dae-Yon Lee、Choong Woon Moon、Chul-Ho Jun
DOI:10.1021/jo025541g
日期:2002.5.1
An allylic alcohol, utilized as a precursor for an aliphatic aldehyde, reacted with olefins to afford aliphatic ketones in the presence of RhCl(PPh(3))(3), 2-amino-4-picoline, aniline, and benzoic acid through a tandem reaction of an isomerization and a chelation-assistedhydroacylation.
Lithiated ambident anions derivedfrom (1-alkyl-2-propenyl)- or (1-phenyl-2-propenyl)-pentamethyl phosphoric triamides undergo regioselectively γ-reaction with various alkylating reagents and isobutyraldehyde. Further hydrolysis of adducts releases the ketone under acid conditions. Number of synthetic applications clearly show the ketone homoenolate behaviour of these new carbanions.
Quaternary ammonium salts of certain phenylbutylamines are useful antiarrhythmic drugs. A method for treating arrhythmia and prolonging the action potential of cardiac tissue is provided. Pharmaceutical formulations containing such quaternary ammonium salts are disclosed.
Direct Access to Isotopically Labeled Aliphatic Ketones Mediated by Nickel(I) Activation
作者:Aske S. Donslund、Simon S. Pedersen、Cecilie Gaardbo、Karoline T. Neumann、Lee Kingston、Charles S. Elmore、Troels Skrydstrup
DOI:10.1002/anie.201916391
日期:2020.5.18
An extensive range of functionalized aliphaticketones with good functional-group tolerance has been prepared by a NiI -promoted coupling of either primary or secondary alkyl iodides with NN2 pincer NiII -acyl complexes. The latter were easily accessed from the corresponding NiII -alkyl complexes with stoichiometric CO. This Ni-mediated carbonylative coupling is adaptable to late-stage carbon isotope