Copper-Catalyzed Oxaziridine-Mediated Oxidation of C–H Bonds
作者:Hashim F. Motiwala、Belgin Gülgeze、Jeffrey Aubé
DOI:10.1021/jo3012336
日期:2012.8.17
bonds has been observed via copper-catalyzed reactions of oxaziridines. The oxidation proceeded with a variety of substrates, primarily comprising allylic and benzylic examples, as well as one example of an otherwise unactivated tertiary C–H bond. The mechanism of the reaction is proposed to involve single-electrontransfer to the oxaziridines to generate a copper-bound radicalanion, followed by hydrogen
Stereospecific Construction of Chiral Tertiary and Quaternary Carbon by Nucleophilic Cyclopropanation with Bis(iodozincio)methane
作者:Kenichi Nomura、Seijiro Matsubara
DOI:10.1002/asia.200900289
日期:2010.1.4
The reaction of a ketone having a leaving group at the α‐position, such as α,β‐epoxy ketone or α‐sulfonyloxy ketone, with bis(iodozincio)methane affords a zinc alkoxide of cyclopropanol. The reaction proceeds by nucleophilic addition of the dizinc to the carbonyl group and a sequential intramolecular nucleophilic substitution of the introduced iodozinciomethyl group to the adjacent electrophilic carbon
IBX, an Excellent Reagent for Oxidation of 2-Furyl Carbinols: A New and General Method for Preparation of Furyl Ketones
作者:Vishwakarma Singh、Vikrant Singh
DOI:10.1080/00397910903069673
日期:2010.4.12
An excellent method for the oxidation of various 2-furyl carbinols with o-iodoxybenzoic acid (IBX) has been described. This method provides a simple and efficient route to a variety of 2-furylketones which are not readily accessible otherwise.
Preparation of Zinc–Homoenolate from α-Sulfonyloxy Ketone and Bis(iodozincio)methane
作者:Kenichi Nomura、Seijiro Matsubara
DOI:10.1246/cl.2007.164
日期:2007.1
Treatment of α-sulfonyloxy ketone with bis(iodozincio)-methane gives a zinc cyclopropoxide which is formed via a nucleophilic addition of the reagent to carbonyl group followed by an intramolecular substitution reaction.
Molecular complexity from aromatics: synthesis of highly functionalized spiro δ-lactones
作者:Vikrant Singh、Vishwakarma Singh
DOI:10.1016/j.tetlet.2009.04.019
日期:2009.6
A novel, general, and efficient method has been developed for the synthesis of highlyfunctionalized spiro δ-lactones from aromatic precursors. Our methodology involves a tandem oxidative dearomatization-rearrangement of tertiary furyl carbinols and ring-closing metathesis as key features. This method allows an access to the spirolactones attached to carbocycles of various sizes.