1.2- Epoxy-2-methylpropane

Epoxy-24-methylene-21 -norcholesta-7,17(20)-dien-3-ol, see E-20076 1,2-Epoxy-2-methylpropane, see D-20232... 

The isolation of the non-cyclic amino(aryl)carbenes and amino(alk-yl)carbenes demonstrated that singlet carbene centres can be sufficiently stabilized by only one a-nitrogen atom. In 2005, Bertrand and co-workers succeeded in preparing the first cyclic alkyl(amino)carbenes (CAACs Scheme 1.15). The precursor for CAAC 108 was obtained from an imine by deprotonation with LDA (LDA = lithium diisopropylamide) and subsequent reaction with 1,2-epoxy-2-methylpropane to give 106, which was converted into cyclic aldiminium salt 107 by reaction with trifluoromethanesulfonic acid... 

Lithium aluminum hydride reduction of l,2-epoxy-2-methylpropane gives, as expected, predominantly tert-butyl alcohol. 

Crotonic acid 2-Ethylhexyl chloride 2-Methylpropanal Pyrocatechol Triisobutylene resin synthesis, coatings m-Divinyl benzene resin, automotive components Polyarylether ketone resin resin, blow moldings Ethylene/methyl acrylate copolymer Polyarylether ketone resin resin, coatings Epoxy-novolac resin, coatings UV-curable... 

Chang et al. [73] and Nawar et al. [74] have identified many of the volatiles formed during deep fat frying. They have found numerous acids, alcohols, aldehydes, hydrocarbons, ketones, lactones, esters, aromatics, and a few miscellaneous compounds (e.g., pentylfuran and 1,4-dioxane) as products of deep fat frying. More recently, Wagner and Grosch [75] have studied the key contributors to French fry aroma. The list of key aroma compounds in French fries includes 2-ethyl-3,5-dimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-diethyl-5-methylpyrazine, 3-isobutyl-2-methoxypyrazine, (E,Z), (E,E)-2,4-decadienal, trans-4,5-epoxy-(E)-2-decenal, 4-hydroxy-2,5-dimethyl-3(2H)-furanone, methylpropanal, 2- and 3-methylbutanal, and methanethiol. If one examines this list, it is obvious that the Maillard reaction (pyrazines, branched chain aldeydes, furanones, and methional), and lipid oxidation (nnsaturated aldehydes) are the primary sources of this characteristic aroma. 

Although EO polymerization can be achieved quite rapidly (reaction half-time is about 30 min at room temperature for [EO]/[(TPP)AlCl] =400 in dichloromethane), other epoxides show a lower reactivity. In similar conditions, it requires several hours for POx and 1,2-epoxybutane (BOx), ° whereas for styrene oxide or l,2-epoxy-2-methylpropane conversions do not exceed 15% after 8 days of reaction (Table 7). ° ... 

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