Butyraldehyde 2-methyl

See Allyl isoamyloxyacetate 2-Methyl butyraldehyde CAS 96-17-3 EINECS/ELINCS 202-485-6 FEMA 2691... 

Short-chain C3-C5 aldehydes accessible by hydroformylation, such as isobu-tyraldehyde, isovaleraldehyde, and 2-methyl-butyraldehyde, are used only rarely in fragrance compositions. They are characterized by a fruity and roast odor [42]. More important are linear and branched aldehydes with longer carbon chains. Typical examples are -hexanal, n-octanal, n-decanal, -undecanal, -dodecanal, and -tridecanal. Their odor detection threshold in water is between 4.5 ppb... 

Ducry, L. and Roberge, D.M. (2008) Dibal-H reduction of methyl butyraldehyde using microreactors. Org. Process Res, Dev, 12, 163-167. 

Aldehydes and ketones. re-Butyraldehyde Acetone Methyl re-amyl... 

Methyl Amyl Ketone. Methyl amyl ketone [110-43-0] (MAK) (2-heptanone) is a colorless Hquid with a faint fmity (banana) odor. It is found in oil of cloves and cinnamon-bark oil, and is manufactured by the condensation of acetone and butyraldehyde (158). Other preparations are known (159-162). 

The remaining (8%) //-butyraldehyde production of the United States goes into (in decreasing order) poly(vinyl butyral), 2-ethyIhexanal, trimethylolpropane, methyl amyl ketone, and butyric acid. 

Methyl amyl ketone, derived from the crossed aldol condensation of -butyraldehyde and acetone, is used predominandy as a high soHds coatings solvent. It is also employed as a replacement for the very toxic 2-ethoxyethyl acetate [111 -15-9J. 

A 600-mL, three-necked, round-bottomed flask 1s equipped with a mechanical stirrer, a short gas inlet tube, and an efficient reflux condenser fitted with a potassium hydroxide drying tube. The flask is charged with 13.4 g (0.05 mol) of 3-ben2y1-5-(2-hydroxyethyl)-4-methyl-l,3-th1azol1um chloride (Note 11, 72.1 g (1.0 mol) of butyraldehyde (Note 2). 30.3 g (0.3 mol) of triethylamine (Note 2), and 300 raL of absolute ethanol. A slow stream of nitrogen (Note 3) is begun, and the mixture is stirred and heated In an oil bath at 80°C. After 1.5 hr the reaction mixture is cooled to room temperature and concentrated by rotary evaporation. The residual yellow liquid Is poured Into 500 mL of water contained 1n a separatory funnel, and the flask is rinsed with 150 mL of dichloromethane which is then used to extract the aqueous mixture. The aqueous layer is extracted with a second 150-mL portion of... 

Quaternary salts of the substances represented by tliese formulae have been prepared by Kogl, Veldstra and van der Laan as well as of the next lower homologues, the substituted butyraldehydes, and the methyl ethers of both series. Their pharmacological activities were negligible in comparison with that of muscarine, but as six stereoisomeric forms may be produced in each synthesis, the inactivity may be due to stereoisomerism, just as in the case of threonine (a-amino-)3-hydroxy-butyric acid) where West and Carter found that only the d —) form is... 

Butyl alcohol, n-butyraldehyde, methyl ethyl ketone, 2-meth-ylfuran, tetrahydrofuran, 4-methyl-l,3-dioxolane, 2-methyl THF, 3-methyl THF, and tetrahydropyran... 

Tetrahydrofuran (THF) impurities acetone, acrolein, 2,3-DHF, butyraldehyde, isopropyl alcohol, THF. 1,3-dioxolane, 2-methyl THF, benzene, and 3-methyl THF... 

Aldehydes and ketones. n-Butyraldehyde Acetone Methyl n-amyl ketone Benzaldehyde Acetophenone Benzophenone. 

For those aldehydes and ketones which are volatile enough, gas chromatography of the headspace gases can be used, and this has been used to measure acetone, butyraldehyde, and 2-butanone in oceanic waters. In a gas chromatography-mass spectrometry analysis of a single sample of volatile materials concentrated from inshore waters onto Tenax GC, MacKinnon [ 139] reported tentative identification of methyl isopropyl ketone, bromoform, 4-methyl-2-pentanone, 2-hexanone, and 2-hexanal. 

The principal product of the hydroformylation which is most desired in industrial applications is a linear aldehyde. The unmodified, cobalt-catalyzed processes produce a mixture of linear and branched aldehydes, the latter being mostly an a-methyl isomer. For the largest single application—propylene to butyraldehydes—the product composition has an isomer ratio (ratio of percent linear to percent branched) of (2.5 t.0)/l. The isobutyraldehyde cannot be used to make 2-ethylhexanol, and iso-... 

---