5-Nitro-2,4-pentadiene

Pentachloro-5-ethylcyclo-pentadiene, 43, 90 Pentacyanopropenc, 41,100 acid strength of, 41, 100 Pentane, 2,2,4-trim ethyl-4-nitro, 43, 87... 

Reaktiver verhalten sich ( )-2-Nitro-l-phenylsulfonyl-1-alkene, wobei die Nitro-Gruppe die Addition starker kontrolliert als die Sulfonyl-Gruppe. So erhalt man z.B. aus (E)-2-Nitro-1-phenylsulfonyl-ethen mit ( )-1,3-Pentadien 3-Methyl-4-nitro-5-phenylsulfonyl-... 

Beilstein Handbook Reference) 1,5-Bis(5-nitro-2-furanyl)-1,4-pentadien-3-one, (aminoimino-methyl)hydrazone sym-Bis(6-nitro-2-turfurylidene) acet-one guanylhydrazone Bis(2-(5-nitro-... 

Cyclopent-2-en-l-ones. A mixture of 2.3 g. 5-(5-nitro-2-furyl)-2-methyl-4-ethyl-2-cw-4-tran5-pentadienal, 0.5 N HCl, and tetrahydrofuran heated 2 hrs. on a water bath -> 1.2 g. 2-(5-nitro-2-furyl)-3-ethyl-5-methylcyclopent-2-en-l-one. F. e. s. H. Saikadii, H. Ogawa, and K. Sato, Chem. Pharm. Bull. 77,1757 (1969). 

The course of aromatic nitration appears to involve rate-determining attack of NO2 on a ring position to give an unstable "pentadienate" cation intermediate, followed by loss of a proton to give the nitro derivative. 

Napolitano, A., E. Camera, M. Picardo, and M. d Ischia. 2000. Acid-promoted reactions of ethyl linoleate with nitrite ions Formation and stmctural characterization of isomeric nitroalkene, nitrohydroxy, and novel 3-nitro-l,5-hexadiene and 1,5-dinitro-l, 3-pentadiene products. J Ore Ghent 65 (16) 4853-60. 

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