3- Methyl-l-butane

Trans -2-butenyl-l- 3-Methyl-l-butane-thioacetate thiol... 

Bacillus sp. torynebacterium sp. ACTINOMYCETES granary 3-Methyl-l-butanal, 2-Methyl-2-hydroxy-3-keto butanal, pyrazines... 

Studies on banana tissue slices have shown that valine and leucine concentrations increase about threefold following the climacteric rise in respiration [10]. Radioactive labeling studies have shown that valine and leucine are transformed into branched chain flavor compounds that are essential to banana flavor (2-methyl propyl esters and 3-methyl butyl esters, respectively). As can be seen in Figure 4.6, the initial step is deamination of the amino acid followed by decarboxylation. Various reductions and esterifications then lead to a number of volatiles that are significant to fruit flavor (acids, alcohols, and esters). Recent work has shown that amino acids play a role in apple flavor as well. For example, isoleucine is the precursor of 2-methyl butyl and 2-methyl butenyl esters in apples [24,25]. An unusual flavor compound, 2-isobutylthiazole, has been found to be important to the flavor of tomato. It is hypothesized that this compound is formed from the reaction of 3-methyl-l-butanal (from leucine) with cysteamine. 

Butyr aldehyde Butanal 116 C4H8O 3-Methyl-l-butyne 48 CsHs... 

Synonyms AI3-15288 C-07328 EINECS 204-663-5 FEMA No. 2057 Fermentation amyl alcohol Fusel oil IP3 l-Hydroxy-3-methylbutane Isoamylol Isobutyl carbinol Isopentanol Isopentyl alcohol Methyl-3-butan-l-ol 2-Methyl-4-butanol 2-Methylbutan-4-ol 3-Methylbutanol 3-Methylbutan-l-ol 3-Methyl-l-butanol NSC 1029 Primary isoamyl alcohol Primary isobutyl alcohol UN 1105. 

The hydroformylation of several olefins in the presence of Co2(CO)8 under high carbon monoxide pressure is reported. (S)-5-Methylheptanal (75%) and (S)-3-ethylhexanal (4.8%) were products from (- -)(S)-4-methyl-2-hexene with optical yields of 94 and 72%, respectively. The main products from ( -)(8)-2,2,5-trimethyl-3-heptene were (S)-3-ethyl-6,6-di-methylheptanal (56.6%) and (R)-4,7,7-trimethyloctanal (41.2%) obtained with optical yields of 74 and 62%, respectively. (R)(S)-3-Ethyl-6,6-dimethylheptanal (3.5% ) and (R)(S)-4,7,7-trimethyloctanal (93.5%) were formed from (R)(S)-3,6,6-trimethyl-l-heptene. (+/S)-l-Phenyl-3-methyl-1-pentene, under oxo conditions, was almost completely hydrogenated to (- -)(S)-l-phenyl-3-methylpentane with 100% optical yield. 3-(Methyl-d3)-l-butene-4-d3 gave 4-(methyl-d3)pentarwl-5-d3 (92%), 2-methyl-3-(methyl-d3)-butanal-4-d3 (3.7%), 3-(methyl-d3)pentanal-2-d2,3-d1 (4.3%) with practically 100% retention of deuterium. The reaction mechanism is discussed on the basis of these results. 

These data have been confirmed further by the results of the investigation of the hydroformylation of 3-(methyl-d3)-l-butene-4-d3 (I) under a high carbon monoxide partial pressure (125 atm) (11) (Scheme 1). 4-(Methyl-d3)pentanal-5-d3 (II) and 2-methyl-3-(methyl-d3)butanal-4-cf3 (III) were obtained in the proportion of 92% and 3.7%, respectively, with almost 100% retention of deuterium in the original position of the chain. 3-(Methyl-(23)pentanal-2-d2,3-(2i (IV) was 4.3% with practically 100% substitution of the hydrogen with deuterium on the tertiary carbon atom of the starting olefin (Scheme 1). These data are consistent with both Casey s and with our data for olefins with quaternary carbon atoms. 

Butane 4-Chloro-3-methyl-l,l,1.2,2-pentafluoro- ElOb, 352 (En + Cl-A-Cl/SbFs/HF)... 

SYNS ALGAFAN ANTALVIC DARVON HYDROCHLORIDE DEPRANCOL DEPROMIC DEVELIN DEXTROPROPOXYPHENE HYDROCHLORIDE DEXTROPROXYPHEN HYDROCHLORIDE d-4-DIMETHYLAMINO-3-METHYL-l,2-DIPHENYL-2-BUTANOL PROPIONATE HYDROCHLORIDE s-a-(2-(DIMETHYLAMINO)-l-METHYLETHYL)-a-PHENYLBENZENEETHANOL PROPIOATE HYDROCHLORIDE (+)-l,2-DIPHENYL-2-PROPIONOXY-3-METHYL-4-DIMETHYLAMINO-BUTANE HYDROCHLORIDE DOLENE DOLOCAP... 

METHYLBUTAN-l-OL see IHPOOO 3-METHYLBUTAN-3-OL see PBVOOO 3-METHYL-l-BUTANOL (CZECH) see IHPOOO 3-METHYLBUTANOL NITRITE see IMBOOO 3-METHYL-2-BUTANONE see MLA750 3-METHYL BUTAN-2-ONE (DOT) see MLA750 METHYLBUTENE see IHR220 2-METHYLBUTENE see IHR220... 

Chloro-2-methyl- 2-Chloro-2-methyl- 2-Chloro-3-methyl- l-Chloro-3-methyl-butane (I) butane (11) butane (111) butane (IV)... 

Chloro-3-methyl- l-Chloro-3-methyl-butane (III) butane (TV)... 

The most obvious characteristic of thiols is their appalling odor. Skunk for example, is caused primarily by the simple thiols, 3-methyl 1-butan and 2-butene-l thiol. Volatile thiols are also added to natural gas to as an easily detectable warning in case of leaks. 

Butyraldehyde Butanal 116 C4H80 3-Methyl-l-butyne 48 C5H8... 

Attack of NO3 on isoprene apparently proceeds in much the same manner, but there is considerable controversy about the precise reaction pathway because of the variety of peroxy radicals that can be formed. The products, such as 4-nitroxy-2-methyl-l-butan-3-one and methacrolein, are consistent with the initial addition of NO3 to the terminal carbon atoms to form nitro-oxy-peroxy radicals in the presence of oxygen apparently the NO3 adds preferentially to position 1 (Fig. 12). 3-methyl-4-nitroxy-2-butenal was found as the main product in these experiments. The nitro-oxy-peroxy radicals can react with NO2, in the presence of O2, to yield thermally unstable nitroxy-peroxynitrate compounds. One particularly important feature of the addition of NO3 is the extent to which the initial adduct, which might eliminate NO2 to form an epoxide, is actually converted to the nitro-oxy-peroxy radicals in the atmosphere. 

Zirconocene complexes (with s-cis geometry) of isoprene, 2,3-dimethylbutadiene, and 3-methyl-l,3-pentadiene are reported to give exclusively 1 1 addition with carbonyl substrates even if these are used in excess and the reaction temperature is fairly high (ca. lOO C). " On the contrary, zirconocene complexes of s-c2s-butadiene, 1,3-pentadiene, and 2,4-hexadiene ca. 1 1 mixture of the s-cis and s-trans isomers) easily accept (equation S3) 2 equiv. of either butanal or 3-pentanone, at low temperature ca. 30 C) in high yields (95%). ° This can be exploited for the stepwise insertion of two different electrophiles... 

Tg of Cytop is 108°C. However, when CF3 is substituted at the third position of the butane, perfluoro-4-vinyloxy-3-methyl-l-butene has a higher value of approximately 120°C [12] (Figure 16.4). 

One of the best pieces of evidence supporting the carbocation mechanism for the electrophilic addition reaction was discovered during the 1930s by F. C. Whitmore of the Pennsylvania State University, who found that stmctural rearrangements often occur during the reaction of HX with an alkene. For example, reaction of HCl with 3-methyl-l-butene yields a substantial amount of 2-chloro-2-methyl-butane in addition to the "expected" product, 2-chloro-3-methylbutane. 

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