Synthesis of 3-Substituted 2-Aminonaphtho[2,3-<i>b</i>]furan-4,9-diones from 2-Hydroxy-1,4-Naphthoquinone and Nitroalkenes
作者:Manoj R. Zanwar、Veerababurao Kavala、Sachin D. Gawande、Chun-Wei Kuo、Ting-Shen Kuo、Mei-Ling Chen、Chiu-Hui He、Ching-Fa Yao
DOI:10.1002/ejoc.201300996
日期:2013.12
The efficient base-catalyzed synthesis of 3-substituted2-aminonaphtho[2,3-b]furan-4,9-dione derivatives from readily available precursors such as 2-hydroxy-1,4-naphthoquinone and nitroalkenes under aqueous conditions is described. Interesting features of this methodology are the conversion of a nitro functionality into an amino functionality in the absence of a reducing agent and the development of
Hydroxyalkylation of Conjugated Nitroalkenes with Activated Nonenolizable Carbonyl Compounds
作者:Indubhusan Deb、Mamta Dadwal、Shaikh M. Mobin、Irishi N. N. Namboothiri
DOI:10.1021/ol060041l
日期:2006.3.1
[reaction: see text] The Morita-Baylis-Hillmanreaction of a variety of conjugatednitroalkenes with activated nonenolizable carbonylcompounds such as glyoxylate, trifluoropyruvate, pyruvaldehyde, and ninhydrin in the presence of 40-100 mol % of DMAP in acetonitrile or 100 mol % of imidazole in CHCl(3) or THF provided the adducts in decent to good yields. In most cases, the reactions catalyzed by
Synthesis of Nitroalkenes Involving a Cooperative Catalytic Action of Iron(III) and Piperidine: A One-Pot Synthetic Strategy to 3-Alkylindoles, 2<i>H</i>-Chromenes and<i>N</i>-Arylpyrrole
作者:Swapnadeep Jalal、Soumen Sarkar、Krishnendu Bera、Sukhendu Maiti、Umasish Jana
DOI:10.1002/ejoc.201300172
日期:2013.8
efficient and simple strategy has been developed to synthesize various substituted nitroalkenesinvolving a cooperativecatalytic system of FeCl3 and piperidine. This dual catalytic protocol simultaneously activates both electrophile and nucleophile and works under mild reaction conditions so that many sensitive functional groups were tolerated. Moreover, this cooperativecatalytic reaction is also suitable
Concise routes to the synthesis of indole-tethered nitrileoxides have been developed, and their intramolecularnitrileoxidecycloadditions were studied. Heterocyclic scaffolds involving isoxazolinobenzoxepane frameworks have been achieved via intramolecularnitrileoxidecycloaddition of 3-[1-(2-allyloxyphenyl)-2-nitroethyl]-1H-indole derivatives using (Boc)2O and DMAP. This protocol affords products