Au/Ag–Mo nano-rods catalyzed reductive coupling of nitrobenzenes and alcohols using glycerol as the hydrogen source
作者:Xinjiang Cui、Chengming Zhang、Feng Shi、Youquan Deng
DOI:10.1039/c2cc34178f
日期:——
A highly efficient Au/AgâMo nano-rods catalyst was prepared for the one-pot synthesis of imine and amine using equal molar ratio of nitrobenzene and alcohol as starting materials, and bio-based glycerol as the hydrogen source. The reaction mechanism of the nitrobenzene reduction, amine and aldehyde coupling, and imine reduction was explored.
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
A visible-light-promoted regioselective C(sp2)–H/C(sp3)–H cross-dehydrogenative coupling between 2H-indazoles and ethers has been achieved using a catalyticamount of rose bengal as an organophotoredox-catalyst and tert-butyl hydroperoxide (TBHP) as an oxidant at ambient temperature underaerobicconditions. A variety of C-3 oxyalkylated 2H-indazoles have been synthesized in moderate to good 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).
Efficient synthesis of polysubstituted pyrrole-3-carbonitriles via reactions of 1,1-dicyano-2,3-diarylcyclopropanes with aromatic imines
作者:Qin Fu、Chao-Guo Yan
DOI:10.1016/j.tetlet.2011.06.085
日期:2011.8
Co(ClO4)2 smoothly catalyzed the reactions of 1,1-dicyano-2,3-diarylcyclopropanes with aromaticimines to give the novel polysubstituted pyrrole-3-carbonitriles bearing an 2-arylidenimino group in good to high yields in refluxing THF.