3- Hydroxy-2-methylpentanal

Hydroxy 2 methylpentanal (from addition of enolate of propanal to propanal)... 

C6H1202 3-hydroxy-2-methylpentanal 615-30-5 421.64 36.409 2 8591 C6H1206 beta-D-fructose 53188-23-1 377.15 32.218 2... 

We have already seen (Section 19.4) how a molecule of ethanal can react with its enolate to form 3-hydroxybutanal (aldol). We have also seen (Practice Problem 19.9) how propanal can react with its enolate anion to form 3-hydroxy-2-methylpentanal. The other two products are formed as follows. 

The present homoallylation with siloxy- and methoxy-substituted dienes may be of great synthetic use. The product 42 is easily converted to anti-5-phenyl-5-hydroxy-3-methylpentanal (Scheme 9) hence the diene 41f may be regarded as a synthetic equivalent of a bis-homoenolate of 3-methylbutanal, being capable of introducing 1,3-anti relationship between the methyl and hydroxy groups in the product. 

Synonyms AI3-00045 BRN 1740440 Caswell No. 280 CCRIS 6177 DAA Diacetone Di-acetonyl alcohol Diketone alcohol Dimethylacetonyl carbinol EPA pesticide chemical code 033901 4-Hydroxy-2-keto-4-methylpentane 4-Hydroxy-4-methylpentanone-2 4-Hydroxy-4-methylpentan-2-one 4-Hydrojg -4-methyl-2-pentanone 2-Methyl-2-pentanol-4-one NSC 9005 Pyranton Pyranton A Tyranton UN 1148. 

Hydroxy 2 keto-4-methylpentane, see Diacetone alcohol Hydroxymethylbenzene, see Benzyl alcohol l-Hydroxy-2-methylbenzene, see 2-Methylphenol l-Hydroxy-4-methylbenzene, see 4-Methylphenol... 

Hydroxymethylfuran, see Furfuryl alcohol 2-Hydroxymethyloxiran, see Glycidol 4-Hydroxy-4-methylpentanone-2, see Diacetone alcohol 4-Hydroxy-4-methylpentan-2-one, see Diacetone alcohol 4-Hydroxy-4-methyl-2-pentanone, see Diacetone alcohol... 

NiL,(C104)2 4-Hydroxy-4-methylpentan-2-one (diacetone alcohol) SqPl ligand formed by the condensation of two molecules of acetone 1500... 

The reactions of butane-2,3-diol by HCF in alkaline medium using Ru(III) and Ru(VI) compounds as catalysts leads to similar experimental rate equations for both the reactions. The mechanism involves the formation of a catalyst-substrate complex that yields a carbocation for Ru( VI) or a radical for Ru(III) oxidation. The role of HCF is in catalyst regeneration. The rate constants of complex decomposition and catalyst regeneration have been determined.89 A probable mechanism invoving formation of an intermediate complex has been proposed for the iridium(III)-catalysed oxidation of propane- 1,2-diol and of pentane-1,5-diol, butane-2,3-diol, and 2-methylpentane-2,4-diol with HCF.90-92 The Ru(VIII)-catalyzed oxidation some a-hydroxy acids with HCF proceeds with the formation of an intermediate complex between the hydroxy acid and Ru(VIII), which then decomposes in the rate-determining step. HCF regenerates the spent catalyst.93... 

A widely studied example of this kind is the synthesis of methyl isobutyl ketone (MIBK, used as a solvent for inks and lacquers) from acetone. The former was previously prepared from the latter through a catalytic three-step process base-catalysed production of 4-hydroxy-4-methylpentan-2-one, acid dehydration into mesityloxide (MO), then hydrogenation of MO on a Pd catalyst. Since acetone aldolization occurs through acid catalysis as shown over a H-MFI zeolite at 433 K (MO is the main reaction product, the aldolization product being rapidly dehy-drated[5]), it is possible, by associating with the acid catalyst a hydrogenation phase,... 

Recently, AEDA and SHA-0 yielded 41 and 45 odor active compounds for Scheurebe and Gewurztraminer wines, respectively (P). Ethyl 2-methylbutyrate, ethyl isobutyrate, 2-phenylethanol, 3-methylbutanol, 3-hydroxy-4,5-dimethyl-2(5H)-furanone, 3-ethylphenol and one unknown compound, named wine lactone, showed high flavor dilution (FD)- factors (Table I) in Gewurztraminer and Scheurebe wines. 4-Mercapto-4-methylpentan-2-one belongs to the most potent odorants only in the variety Scheurebe whereas cis-rose oxide was perceived only in Gewurztraminer (Table I). 4-Mercapto-4-methylpentan-2-one was identified for the first time in Sauvignon blanc wines (JO). The unknown compound with coconut, woody and sweet odor quality, which has not yet been detected in wine or a food, was identified as 3a,4,5,7a-tetrahydro-3,6-dimethylbenzofuran-2(3H)-one (wine lactone) (JJ). 

SYNS DIACETONALCOHOL (DUTCH) DIACETON-ALCOOL (ITALIAN) DIACETONALKOHOL (GERMAN) DIACETONE DIACETONE-ALCOOL (FRENCH) DIKETONE ALCOHOL 4-HYDROXY-2-KETO-4-METHYLPENTANE 4-HYDROXY-4-METHYL-PENTAN-2-ON (GERMAN, DUTCH) 4-HYDROXY-4-METHYLPENTANONE-2 4-HYDROXY-4-METHYL PENTAN-2-ONE 4-HYDROXY -4-METHYL-2-PENTANONE 4-IDROSSI-4-METIL-PENTAN-2-ONE (ITALIAN) 2-METHYL-2-PENTANOL-4-ONE PYRANTON TYRANTON... 

The results of pyrolysis of polypropylene in air depends on the pyrolysis heating rate because the pyrolysis process competes with the oxidation [108], By heating between 120° C and 280° C in air, polypropylene is reported to generate ethene, ethane, propene, propane, isobutene, butane, isobutane, pentadiene, 2-methyl-1-pentene, 2,4-dimethyl-1-pentene, 5-methyl-1-heptene, dimethylbenzene, methanol, ethanol, 2-methyl-2-propene-1-ol, 2-methylfuran, 2,5-dimethylfuran, formaldehyde, acetaldehyde, acrolein, propanal, methacrolein, 2-methylpropanal, butanal, 2-vinylcrotonaldehyde, 3-methylpentanal, 3-methylhexanal, octanal, nonanal, decanal, ethenone, acetone, 3-buten-2-one, 2-butanone, 1-hydroxy-2-propanone, 1-cyclopropylethanone, 3-methyl-2-buten-2-one, 3-penten-2-one, 2-pentanone, 2,3-butanedione [109]. 

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