The directesterification of carboxylic acids with perfluorinated alcohols mediated by XtalFluor-E is reported. The corresponding polyfluorinated esters are obtained in moderate to excellent yields with a broad range of carboxylic acids, including aromatic, heteroaromatic, aliphatic, and nonracemic chiral substrates, using only a slight excess (2 equiv) of the perfluorinated alcohol. Control experiments
Oxidative Esterification of Aldehydes Using a Recyclable Oxoammonium Salt
作者:Christopher B. Kelly、Michael A. Mercadante、Rebecca J. Wiles、Nicholas E. Leadbeater
DOI:10.1021/ol400785d
日期:2013.5.3
aldehydes to hexafluoroisopropyl (HFIP) esters using the oxoammoniumsalt 4-acetylamino-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate (1a) is reported. These esters can be readily transformed into a variety of other functional groups. The spent oxidant (1b) can be recovered and conveniently reoxidized to regenerate the oxoammoniumsalt, 1a.
Organocatalytic Amidation and Esterification of Aldehydes with Activating Reagents by a Cross-Coupling Strategy
作者:Bin Tan、Narihiro Toda、Carlos F. Barbas
DOI:10.1002/anie.201205921
日期:2012.12.7
Formation on demand: An organocatalytic cross‐coupling reaction of aldehydes with N‐hydroxyimides, hexafluoroisopropyl alcohol, and sulfonimides has been developed. The resulting active intermediates can be directly converted into amides or esters in one pot. This simple method makes use of readily available starting materials, and the newly discovered activatingreagents should find broad application
Preparation of hexafluoroisopropyl esters by oxidative esterification of aldehydes using sodium persulfate
作者:Arturo León Sandoval、Fabrizio Politano、Mason L. Witko、Nicholas E. Leadbeater
DOI:10.1039/d1ob00251a
日期:——
A simple, metal-free route for the oxidative esterification of aldehydes to yield hexafluoroisopropyl esters is reported. The methodology employs sodium persulfate and a catalytic quantity of a nitroxide and is applicable to aromatic, heteroaromatic, and aliphatic aldehydes.
This disclosure provides compounds and compositions which may be modulators of MAGL and/or ABHD6 and their use as medicinal agents, processes for their preparation, and pharmaceutical compositions that include disclosed compounds as at least one active agent. The disclosure also provides for method of treating a patient in need thereof, where the patient is suffering from indications such as pain, solid tumor cancer and/or obesity comprising administering a disclosed compound or composition.