1.3- dinitro alkanes

Ballini, R., Bosica, G., Fiorini, D., and Palmieri, A. 2004. One-pot synthesis of 1,3-dinitro-alkanes under heterogeneous catalysis. Synthesis, 12 1938 0. 

Dinitro-alkane sind synthetische Aquivalente fur 1,3-Dicarbonyl-Verbindungen sie sind in guter Ausbeute durch Michael-Addition von Nitro-alkanen an 1-Nitro-alkene zuganglich (s.Bd.X/1, S. 229) ... 

Shaw calculated the isokinetic point between homolysis and elimination as 770K for mononitro- and vicinal dinitro-alkanes and as 370K for gem-dinitro species [51]. In gem-polynitro species the C-N02 bond is weaker than in mononitro compounds due to inductive effects [52] thus, homolysis is thought to be the principal decomposition pathway in 2,2 dinitropropane and hexanitroethane [48]. Octanitrocubane has recently been synthesized (Fig. 6). Its crystal density was lower (1.979 g/cm3) than the predicted 2.1 [53]. Like hexanitrobenzene, octanitrocubane has a perfect oxygen balance, but at this point it appears unlikely that further development of this compound will be undertaken. 

Preparation of Pseudonitroles. The procedure used to prepare pseudonitroles was identical to that described for preparing gem-dinitro-alkanes except that nitrosonium tetrafluoroborate was used in place of nitronium tetrafluoroborate. The yields of pseudonitrole obtained from the various nitronate salts are presented in Table IV. 

Prepn by Michael reaction of gem-dinitro-alkanes nitroform) 8) M.E. Hill, USP 3223725(1965) CA 64, 6570(1966) (Prepn with Friedel-Crafts catalyst) 9) M.E. Hill, USP 3230247(1966) CA 64, 9598(1966) (Prepn by transesterification)... 

Chlor-l,l-dinitro-alkane erhalt man aus den Alkalimetall- oder Silber-Salzen der... 

Dinitro-alkane und Chlor862,863. Aus Natrium-2,2-dinitro-ethanol entsteht 2-Chlor-... 

Fur Cyan- und Aminocarbonyl-Funktionen enthaltende 1,1-Dinitro-alkane ist die Metho-de ungeeignet (s.S. 100)883. 

Die Fluorierung der freien 1,1-Dinitro-alkane muB in aprotisch-dipolaren Losungsmitteln erfolgen, in Gegenwart von Wasser konkurriert die Chloriemng886. 

Dinitro-l-jod-alkane, die bishcr nur in schlechten Ausbeuten zuganglich waren, stellt man vorteilhaft durch Einwirkung von Jodchlorid auf Kalium-l,l-dinitro-alkane... 

Azo-dicarbonyl-Verbindungen addieren 1,1-Dinitro-alkane zu 1,1-Dinitro-l-hydra-zino-alkanen (bis 80%)5O° ... 

In Obersichtsartikeln sind die Reaktionen der Orthocarbonsaure-Derivate mit mindestens einer Nitro-Gruppe am Carbonsaure-C-Atom ausfiihrlich beschrieben571,572. 1,1,1-Tri-nitro- und 1,1-Dinitro-l-halogen-alkane setzten sich mit Nucleophilen in einer, vermutlich tiber Radikalanionen verlaufenden SN-Reaktion573, zu 1,1-Dinitro-alkan-Anionen... 

When olefins are treated with N204 in an ether, ester, or alkane as solvent, vtc-dinitro compounds and 3-nitro alkyl nitrites are produced.803 The reaction can be successfully performed with all kinds of olefins and acetylenes. Generally, both products are produced. The dinitro compound is usually stable, but the ester is quite reactive. Upon addition of water or alcohol it is hydrolyzed to a 3-nitro alcohol. If oxygen is added, it is oxidized to a 3-nitro alkyl nitrate or an a-nitro aldehyde or ketone. 

Alkanes, l.l-dinitro-, treatment of salts with N2O4, 60, 269... 

Interest is shown still in the isomerization of stilbene and its derivatives. A study of the pathways for the cis -trans isomerization of 4-nitro, 4,4-dinitro, and 4-nitro-4 -methoxy stilbenes has been reported. The dynamics of the photoisomerization of stilbenes in hydrocarbon solution has been studied and a comparison of the trans -cis isomerization of stilbene in low viscosity liquid alkanes and in the gas phase has been carried out. The photoisomerization of stilbene in straight chain alcohols has provided evidence for the existence of rotational relaxation in the excited and the ground states. An analysis of the isomerization rates of photoexcited stilbene has been made and the photobehaviour of poly deuteriated stilbene has been studied. ... 

Dinitro-l-fluor-alkane allgemeine Arbeitsvorschrift864 866 Zu einer Suspension Oder Losung von 0,1 mol... 

Dinitro-l-halogen-alkane werden bei der Chlorolyse von 1,1-Dinitro-l-sulfonyl-alkanen900 und der Hydrohalogenolyse von Dinitrosuironium-yliden901 gebildet. 

---