Reaction of Nitrogen‐Radicals with Organometallics Under Ni‐Catalysis: N‐Arylations and Amino‐Functionalization Cascades
作者:Lucrezia Angelini、Jacob Davies、Marco Simonetti、Laia Malet Sanz、Nadeem S. Sheikh、Daniele Leonori
DOI:10.1002/anie.201900510
日期:2019.4
the generation of nitrogen‐radicals by ground‐state single electron transfer with organyl–NiI species. Depending on the philicity of the N‐radical, two types of processes have been developed. In the case of nucleophilic aminyl radicals direct N‐arylation with aryl organozinc, organoboron, and organosilicon reagents was achieved. In the case of electrophilic amidyl radicals, cascade processes involving
A New Route to Phenols: Palladium-Catalyzed Cyclization and Oxidation of γ,δ-Unsaturated Ketones
作者:Sadaf Samadi、Arturo Orellana
DOI:10.1002/cctc.201600447
日期:2016.8.8
We report a new strategy for the synthesis of phenols from acyclic unsaturated ketones in onepot. The reaction proceeds by palladium‐catalyzed carbopalladation of an alkene with the enol form of the tethered ketone, generating a substituted cyclohexanone. Upon introduction of a terminal oxidant a palladium‐catalyzed oxidation ensues to give the desired phenol. This approach allows the programming
Diastereoselective Aldol Reactions of Enolates Generated from Vicinally Substituted Trimethylsilylmethyl Cyclopropyl Ketones
作者:Veejendra K. Yadav、Rengarajan Balamurugan
DOI:10.1021/ol035481g
日期:2003.11.1
[reaction: see text] Vicinally substituted trimethylsilylmethyl cyclopropylketones undergo facile desilylative ring opening with Lewis acids under mild conditions. The enolates, thus generated, undergo aldol addition with aldehydes and ketones. The diastereoselectivity of the reaction with aldehydes depends on the nature of the Lewis acid used. The resulting aldol product is easily converted into
METHOD FOR PRODUCING HIGH PURITY TERMINAL OLEFIN COMPOUND
申请人:Miyoshi Kei
公开号:US20120029229A1
公开(公告)日:2012-02-02
An industrially advantageous method for producing a high purity terminal olefin is disclosed, comprising the steps of (a) contacting a mixture comprising a terminal olefin represented by formula (1):
and one or more corresponding internal olefins as impurities, with a brominating agent in the presence of water or an alcohol, to convert the internal olefin(s) to compound(s) having a higher boiling point than the terminal olefin; and (b) purifying the terminal olefin by distillation from the reaction mixture.
Ni-catalyzed migratory β-selective hydroarylation and hydroalkenylation of alkenyl ketones and alkenyl azahetereoarenes have been realized with aryl boronicacids using alkyl halide as the mild hydride source. This reaction features mild conditions, broad substrate scope and incredible heterocycle compatibility, providing a variety of β-aryl or -alkenyl ketones or heteroarenes in moderate to high yields