2- Methyl-2-butane

Only reaction 1 provides a direct pathway to this chiral molecule the intermediate 2-methyl-butanal may be silylated and reacted with formaldehyde in the presence of the boronated tartaric ester described on page 61. The enantiomeric excess may, however, be low. 

Isopentane (Section 2 10) The common name for 2 methyl butane (CH3)2CHCH2CH3... 

Triathyl-siliciumhydrid reduziert Halogen-alkane bei Aluminiumchlorid-Katalyse nach einem polaren Mechanismus zu Kohlenwasserstoffen. So erhalt man z. B. aus 1-Chlor-hexan 57% d.Th. Hexan, aus l-Chlor-2,2-dimethyl-propan unter Umlagerung 36% d.Th. 2-Methyl-butan bzw. aus 4-Chlor-2,2-dimethyl-butan 50% d.Th. 2,3-Dime-thyl-butans. 

Methyl- 2 -hydroxi mino-b utan5 — 3-Nitro-2-methyl-butan 48% d.Th. 

Dibrom-pentan kann bei -2,2 V in DMSO/Tetraathylammoniumbromid (Vorelek-trolyse ) in hoher Ausbeute zu 1,2-Dimethyl-cyclopropan reduziert werden (die Stereo-isomeren entstehen zu gleichen Teilen)1. In Methanol gelingt die quantitative Herstel-lung von 2-Hydroxy-2-methoxy-1,1 -dimethyl- bzw. 3-Hydroxy-3-methoxy-tetramethyl-cyclopropan aus l,3-Dibrom-2-oxo-3-methyl-butan bzw. 2,4-Dibrom-3-oxo-2,4-dime-thyl-pentan2. 

A base-induced bromination has been reported. 2-Methyl butane reacts with 50% aqueous NaOH and CBr4, in a phase-transfer catalyst, to give a modest yields of 2-bromo-2-methylbutane. ... 

The experiments revealed that the initial rate increases as a function of temperature. The product distribution was not strongly affected by the temperature. The product ratio of pentanal-to-2-methyl butanal is approximately 4. The total pressure did not have any significant effect on the product distribution. 

Fig. 5.5.15 Spatially resolved 13C DEPT spectra recorded for the competitive etherification and hydration reactions of 2-methyl-2-butene (2M2B) to 2-methoxy-2-methylbutane (tert-amyl methyl ether, TAME) and 2-methyl-butan-2-ol (tert-amyl alcohol, TAOH), respectively. The molar composition of the feed was in the ratio 2 10 1 for 2M2B methanol water. The...

Model systems indicate that aldehydes may also be produced by the action of polyphenoloxidases on amino acids in the presence of catechin, all of which are present in coffee beans at some stage between green and roasted. For example, valine yields isobutanal, leucine yields isopentanal, and isoleucine yields 2-methyl-butanal.14 Some of these aldehydes probably undergo condensation reactions in the acidic medium of the roasted bean when moisture is present.15 Some dienals in green coffee beans have recently been identified as (E,E)-2,4- and (E,Z)-2,4-nonadienal and (E,E)-2,4- and (E,Z)-2,4-decadienal.18... 

N-VALERIC ACID ISOBUTYL FORMATE N-PROPYL ACETATE ETHYL PROPIONATE METHYL BUTYRATE METHYL ISOBUTYRATE PIPERIDINE N-PENTANE 2-METHYL BUTANE 2 2-DIMETHYL PROPANE... 

Other Cg hydrocarbons. The dehydrogenation of normal hexane and 2,3-di methyl butane also proceeds but not as voraciously on small platinum clusters. Figure 8 is a plot of the hydrogen content in the first adduct as a function of the size of the platinum metal cluster. The metal atom reacts via dihydrogen elimination to produce PtC6Hi2 products. The platinum trimer is now the smallest cluster that will produce a C H near one. The similarity of size dependent dehydrogenation of the normal hexane and the branched molecule suggest that these systems may not readily aromatize these alkanes. Further structural studies are needed to identify the reaction products. 

Fig. 3. High concentrations of dimethyl sulfide (a) and depleted concentrations of methyl butane (b) correlate with reducing soils over the kimberlite (depicted as the grey zone).

Isotropic properties, silicon, 22 482, 483t Isotropic soap phase, 22 726 Isovaleraldehyde. See also 3-Methyl butanal... 

X-d-ALDEHYDES FROM ORGANOMETAL-LIC REAGENTS 1—d-2—METHYL-BUTANAL, 51, 31... 

ChiU the freezing chuck by dipping it briefly into freezing solution, either 2-methyl-butane with added dry ice or liquid nitrogen. Use a clamp or other device to hold chuck. 

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