39546-80-0Relevant academic research and scientific papers
Geminal dialkylation, alkylative reduction and olefination of aliphatic aldehydes. Reaction of gem-bistriflates with higher order dialkylcyanocuprates
Garcia Martinez,Osio Barcina,Ruiz Diez,Subramanian
, p. 13231 - 13238 (2007/10/02)
gem-Dialkylation or alkylative reduction of α-unbranched aliphatic aldehydes 1 is advantageously achieved by reaction of the corresponding gem-bistriflates 2 with di-n-alkylcyanocuprates or di-sec- and di-tert-alkylcyanocuprates respectively. The reaction of α-branched gem-bistriflates 2 with dialkylcyanocuprates in the presence of boron trifluoride affords the olefins 6 in good yield.
Thermolabile Hydrocarbons, 32. - Competing Cope-Rearrangement and Homolytic Decomposition of meso- and DL-3,4-Di(1-cyclohexen-1-yl)-2,2,5,5-tetramethylhexane
Herberg, Clemens,Beckhaus, Hans-Dieter,Koertvelyesi, Tamas,Ruechardt, Christoph
, p. 117 - 128 (2007/10/02)
meso- and DL-3,4-Di(1-cyclohexen-1-yl)-2,2,5,5-tetramethylhexane (3a) were prepared by an improved reduction procedure (Li/C2H5NH2) from meso- and DL-2,2,5,5-tetramethyl-3,4-diphenylhexane.Products of two competing thermal transformations, C-C cleavage vs
1,1-DICYCLOPENTADIENYL-3,3-DIMETHYLVANADA(IV)CYCLOBUTANE
Seetz, J. W. F. L.,Heisteeg, B. J. J. Van De,Schat, G.,Akkerman, O. S.,Bickelhaupt, F.
, p. 173 - 182 (2007/10/02)
The reaction of 1,3-bis(bromomagnesio)-2,2-dimethylpropane (1b) with dichlorodicyclopentadienylvanadium(IV) (5) gave 1,1-dicyclopentadienyl-3,3-dimethylvanada(IV)cyclobutane (4) in 30percent yield, contaminated with dicyclopentadienylneopentylvanadium(III) (12).Attempts to purify 4 were only partially successful due to its limited stability (t1/2 = 4 h at 25 deg C in cyclopentane).Identification of 4 is therefore based on its having sufficient thermal stability for isolation, on its reaction with bromine to give 1,3-dibromo-2,2-dimethylpropane (2b), and especially on its ESR and 1H NMR spectra.The reaction of 4 with cyclohexanone (15) gave 17 and 18 as the main products; 17 is the aldol dimer of 15, while 18 may be derived from either 4 or 12.Because methylenecyclohexane (16) is not one of the reaction products, it is concluded that 4 does not have a pronounced tendency to fragment to give a metallacarbene (20).
Synthesis of ethylenically unsaturated compounds from aldehydes or ketones
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, (2008/06/13)
Certain hydrocarbylidene-niobium or -tantalum complexes react with aldehydes or ketones to produce ethylenically unsaturated compounds. Exemplary is the reaction of trineopentyl(neopentylidene)tantalum with acetone to produce 2,4,4-trimethyl-2-pentene: EQU1
Hydrocarbylidene compounds of niobium and tantalum
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, (2008/06/13)
Certain hydrocarbylidene compounds of niobium and tantalum react with oxo compounds to form olefins and are also useful as oxygen scavengers. The compounds can also be used to deposit tantalum or niobium mirrors by thermal decomposition. Exemplary is trineopentyl(neopentylidene)tantalum of the formula
