Di-/-butyl ketone

Di-w-butylcarbinol has been prepared by the action of M-butylmagnesium bromide upon m-valeraldehyde1 and upon ethyl formate.1,2 It has also been obtained by the catalytic hydrogenation of di- -butyl ketone in the presence of platinum.3... 

Di-/-butyl ketone reacts to yield pivalaldehyde, isobutylene, and 2-methylpropane. 

CAS 108-83-8 EINECS/ELINCS 203-620-1 UN 1157 (DOT) FEMA 3537 Synonyms DIBK Di butyl ketone s-Diisopropylacetone 2,6-Dimethyl-4-heptanone 2,6-Dimethylheptan-4-one Isobutyl ketone Isovalerone Valerone Classification Ketone Empirical CgHisO... 

Many organic reagents have been used successfully in Pu separation processes. The reagents include tri- -butyl phosphate (TBP) methyl isobutyl ketone thenoyl ttifluoroacetone (TTA) ethers, eg, diethyl ether, di- -butyl ether, tetraethylene glycol dibutyl ether trdaurylamine (TT,A) trioctylamine (TOA) di- -butyl phosphate (DBP) hexyl-di(2-ethylhexyl) phosphate (HDEHP) and many others. Of these, TBP is by far the most widely used (30,95). 

In radical reactions not involving bromine or chlorine on the substrate, rearrangements are much rarer One example is the fluorination of di-tert butyl ketone which produces perfluormated / rt-buty isobutyl ketone [J5] Although isolated yields are poor only the rearranged ketone could be isolated This is perhaps only the second example of a 1,2-acyl shift Low fluorine substrate ratios show that this rearrangement occurs after monofluorination... 

The yields ranged from 55% for the mixture of enamines formed from morpholine and methylisopropyl ketone to 94% for the enamine formed from dimethylamine and methyl t-butyl ketone. The hindered ketone 2,5-dimethylcyclopentanone could be converted to an enamine, but the more hindered ketone, 2,6-di-t-butylcyclohexanone, was inert. White and Weingarten 43) attribute the effectiveness of titanium tetrachloride in this reaction to its ability to scavenge water and to polarize the carbonyl bond. 

X0 to hydroxy compounds. Lower temperatures favor ketone formation and sterically hindered carbonyls, such as 2-thienyl t-butyl ketone, are not reduced. The sensitivity of desulfurization to steric factors is evident by the failure to desulfurize 2,5-di-i-butyl-3-acetylthiophene. The carbonyl groups of both aldehydes and ketones can be protected by acetal formation, as particularly cyclic acetals are stable during desulfurization in methanol at room temperature. " The free aldehydes give primary alcohols on desulfurization. Another method to obtain only keto compounds is to oxidize the mixtures of ketone and secondary alcohol with CrOs after the desulfurization. - Through the desulfurization of 5,5 -diacetyl-2,2, 5, 2"-terthienyl (228), 2,15-hexadecandione (229) has been obtained, which... 

Methyl n-amyl carbinol from methyl n-amyl ketone) Methyl n-butyl carbinol from methyl n-butyl ketone) Methyl t o-propyl carbinol Di-n-butyl carbinol from n-butyl bromide)... 

Di-f-butyl ketone reacts in pentane solution to yield the following products<14) ... 

Methyl ethyl ketone Diethyl ketone Diisopropyl ketone Di-f-butyl ketone Benzophenone... 

Lomas and Dubois (113a) treated di-rerf-butyl ketone with o-tolyllithium and obtained a mixture of rotamers of o-tolyl-di-terf-butylcarbinol (74), which were... 

I) Acetaldehyde, Acetone, Di-tert-butyl ketone. Methyl tert-butyl ketone (reactivity towards HCN)... 

Di-n-butyl ketone n-Butyl bromide Tri-n-butyl carbinol 91... 

Values of 1554 cm for the carbonyl stretching frequency in tlie radical-anion of benzophenone [16] and of 1558 cm for the radical-anion of di-ter/.-butyl ketone [17] suggest that in general Vco will be found at lower frequencies for the radical-anion than for the parent carbonyl compound. 

Surprisingly, under these conditions di-ferf-butyl ketone hydrazone afforded 1,1-di-ferf-butyltetrathiolane in very low yield (2%) (see similar reaction in Scheme 91). 

Jones and Knochel found that the adduct of allylzinc bromide and di-i-butyl ketone, upon conversion to the bromozinc alkoxide, serves as a source of allylzinc bromide,... 

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