Tin-free radical alkylation of ketones viaN-silyloxy enamines
作者:Hyun-Ji Song、Che Jo Lim、Sunggi Lee、Sunggak Kim
DOI:10.1039/b606295d
日期:——
The radical alkylation of ketones is achieved by their conversion into corresponding N-silyloxy enamines, followed by a radical reaction with alkyl halides bearing electron-withdrawing groups.
Air- and Water-Tolerant Rare Earth Guanidinium BINOLate Complexes as Practical Precatalysts in Multifunctional Asymmetric Catalysis
作者:Jerome R. Robinson、Xinyuan Fan、Jagjit Yadav、Patrick J. Carroll、Alfred J. Wooten、Miquel A. Pericàs、Eric J. Schelter、Patrick J. Walsh
DOI:10.1021/ja502568g
日期:2014.6.4
1'-bi-2-naphtholate; RE/M/B = 1/3/3) are among the most enantioselective asymmetric catalysts across a broad range of mechanistically diverse reactions. However, their widespread use has been hampered by the challenges associated with their synthesis and manipulation. We report here the self-assembly of novel hydrogen-bonded rareearth metal BINOLate complexes that serve as bench-stable precatalysts for
Understanding the Scope of Feist-Bénary Furan Synthesis: Chemoselectivity and Diastereoselectivity of the Reaction Between α-Halo Ketones and β-Dicarbonyl Compounds
作者:Yi Peng、Juan Luo、Qiang Feng、Qiang Tang
DOI:10.1002/ejoc.201600975
日期:2016.10
application of a Paal–Knorr synthesis. In this manuscript, we investigate the chemoselectivity and diastereoselectivity of furansynthesisfrom α-halo ketones and β-dicarbonyl compounds, by carrying out the separation and characterization of the intermediates involved in the reaction. Additionally, a one-pot Feist–Benaryfuransynthesisfrom α-halo ketones and β-dicarbonyl compounds without any base or solvent
Investigation of Straightforward, Photoinduced Alkylations of Electron‐Rich Heterocompounds with Electron‐Deficient Alkyl Bromides in the Sole Presence of 2,6‐Lutidine
photosensitizer: We introduce a method for selective photoinduced alkylations of electron‐rich heterocompounds with electron‐deficient allylbromides in the presence of 2,6‐lutidine at 365 or 405 nm. Mechanistic investigations reveal that a colored intermediate formed from 2,6‐lutidine and alkyl bromide is involved in the photoactivation. Our approach uses commercially available reagents and a straightforward
An expedient reductive method for conversion of ketoximes to the corresponding carbonyl compounds
作者:Max M. Majireck、Jason A. Witek、Steven M. Weinreb
DOI:10.1016/j.tetlet.2010.04.131
日期:2010.7
A wide array of readily prepared pivalates of ketoximes can be converted to the corresponding ketones in good yields by treatment with iron powder in THF containing catalytic amounts of both trimethylsilyl chloride and glacial acetic acid at room temperature for 30 min, followed by a brief aqueous workup.