111905-36-3Relevant articles and documents
A new strategy for the construction of polycycles bearing a nitrogen atom on the ring fusion
Deléens, Reynald,Gautier, Arnaud,Piettre, Serge R
, p. 4963 - 4968 (2002)
Nitroethylenes bearing either a phenylthio or a selenoether group in β-position are efficient synthetic equivalents of nitroacetylene. A [4+2] cycloaddition/carbenoid-mediated elimination of PhS(e)CH3/[4+2] cycloaddition sequence of reactions is shown to produce formal biscycloadducts or nitroacetylene in high yields. The cycloaddition reactions are activated by high-pressure and proceed with high regioselectivities and stereoselectivities.
Regioselective Preparation of Cyclohexadienes or Aromatic Nitro Compounds by Diels-Alder Reactions of β-Sulfonylnitroolefins or β-Sulfinylnitroethylene
Ono, Noboru,Kamimura, Akio,Kaji, Aritsune
, p. 251 - 258 (2007/10/02)
β-Sulfonylnitroolefins react with various dienes to give 4-nitro-5-(phenylsulfonyl)cyclohexenes under mild conditions, where the nitro group controls the direction of the addition more effectively than the sulfonyl group.Subsequent treatment of the adducts with Bu3SnH results in the reductive elimination of the nitro and sulfonyl groups to give 1,4-cyclohexadienes.The Diels-Alder reaction of β-sulfinylnitroethylene with dienes and subsequent thermal elimination of sulfenic acid give 1-nitro-1,4-cyclohexadienes, which are readily aromatized to give nitrobenzene derivatives.Thus, β-sulfonylnitroolefins or β-sulfinylnitroethylene is regarded as alkynes or nitroacetylene equivalents for the Diels-Alder reaction, respectively.