2-Ethyl-2-hexen

In the presence of dilute sodium or potassium hydroxide, //-butyraldehyde undergoes the aldol reaction to form 2-ethyl-3-hydroxyhexanal [496-03-7] which, on continued heating, is converted iato 2-ethyl-2-hexenal [26266-68-2]. Hydrogenation of the latter gives 2-ethyl-1-hexanol/7 (94-7%., aptincipal plastici2er alcohol. 

Condensation of butanol has been carried out on alkaline earth metal oxides at 273 K (13,121). This condensation reaction yields 2-ethyl-3-hydroxy-hexanal as a main product other products, such as 2-ethyl-2-hexenal (arising from the dehydration of 2-ethyl-3-hydroxy-hexanal), n-butyl-K-butyrate (arising from the Tishchenko reaction of butyraldehyde), and 2-ethyl-3-hydroxy- -hexyl butyrate (arising from the Tishchenko reaction of 2-ethyl-3-hydroxy-hexanal), are also formed (Scheme 12). 

Blueberry consists of cultivated highbush blueberries Vaccinium corymbo-sum) and wild lowbush blueberries Vaccinium august ifolium). The aroma of cultivated and wild blueberries is dominated by long-chain alcohols, esters and terpenoids. Forney [43] reported that y-butyrolactone, a-terpineol, 6-ethyl 2,6-decadiene-4,5-diol, linalool, benzaldehyde and 2-ethyl-2-hexenal contribute to the aroma of fresh, whole highbush blueberries using GC-O analysis. In... 

C8H140 2-ethyl-2-hexenal 645-62-5 443.32 38.466 2 14669 C8H1403 tetrahydro-2-furanmethanol propanoate 637-65-0 478.65 41.837 1,2... 

From the incubated reaction mixture of benzylamine and butyraldehyde or 2-ethyl-2-hexenal in the presence of dissolved oxygene in a mixture of 90% methanol 0.1 A/ phosphate buffer at 37°C for 48 h, 2-benzyl-l-phenyl-6-propyl-4,5,7-triethyl-2,3,5,6,7,8- and -2,4a,5,6,7,8-hexahydro-l//-pyrido[l,2-cjpyrimidines could be isolated (89MI2). 

The search is on for catalysts to replace those containing toxic heavy metals. The addition of hydrogen chloride to acetylene to form vinyl chloride is catalyzed by mercuric chloride. Rhodium (III) chloride on activated carbon works just as well and is much less toxic 97 It should be tried also in other addition reactions of acetylene as well as in trans-esteriflcation reactions of vinyl acetate. The reduction of 2 ethyl-2-hexenal to 2-ethylhexanol can be catalyzed by a mixture of copper, zinc, manganese, and aluminum oxides in 100% yield.98 This is said to be a replacement for carcinogenic copper chromite. In Reaction 4.15, the amount of toxic chromium(II) chloride has been reduced from stoichiometric to catalytic (9-15 mol% chromium(II) chloride) by the addition of manganese metal.99... 

Similar behavior is seen in the cyciization of dialdehyde (104), an intermediate in the dimerization of 2-ethyl-2-hexenal the resulting mixture of aldol products contains 99% of isomer (10S equation 136).23a b... 

ETHYL-2-HEXENAL (645-62-5) Combustible liquid (flash point 155°F/68°C). Reacts violently with bromine, ketones, strong oxidizers. Incompatible with strong acids, caustics, ammonia, amines. 

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