Oxidative rearrangement of imines to formamides using sodium perborate
作者:Pakawan Nongkunsarn、Christopher A. Ramsden
DOI:10.1016/s0040-4020(97)00101-4
日期:1997.3
N-diphenylformamide. Under the conditions of the SPB oxidative rearrangements, oxaziridine formation may well occur by initial formation of trifluoroperacetic acid. Stereochemical aspects of this novel rearrangement of aldimines 1 → 2 have been investigated using trans- and cis-myrtanal 25 and 30. The observed epimerisation using the N-4-tolyl imine of trans-myrtanal 26 is believed to arise from equilibration
Introduction of (2-CF<sub>3</sub>)Phenyl Group via Nickel-catalyzed C-Cl Bond Activation and Arylation
作者:Zheng Peng、Hongjian Sun、Aiqin Du、Xiaoyan Li
DOI:10.1002/zaac.201400609
日期:2015.4
A simple and mild catalytic arylation via C–Cl bond activation is described. The phenylgroup containing a 2-trifluoromethyl group was introduced into the aromatic imine molecules through C,C-coupling reaction between chloroarenes and the organozinc reagent, bis(2-(trifluoromethyl)phenyl)zinc, with tetrakis(trimethylphosphine)nickel(0) complex as an effective catalyst. Under catalytic conditions chlorinated
The catalytic dehydrogenation and tandem transformation of aromatic alcohols, including oxidative coupling of alcohols and amines, were achieved successfully using a catalytic amount of organosilicon-supported titania (TiO2@PMHSIPN), which enables the efficient synthesis of aromatic aldehydes, imines, and benzimidazoles in good to excellent yields.
An oxidative rearrangement of C,N-diarylaldimines to formamides using sodium perborate
作者:Pakawan Nongkunsarn、Christopher A. Ramsden
DOI:10.1016/s0040-4039(00)61698-2
日期:1993.10
Treatment of C,N-diaryladium (5) with sodium tetrahydrate in triflouroacetic acid solution at 70–80°C results in an oxidative rearrangement to N,N-diarylformamides (6(Scheme 1). A mechanism involving the initial formation of 2,3-diaryloxaziridines is proposed (Scheme 2).