Cyclohexene, reaction

Morpholmo-l cyclohexene, reaction with methyl vinyl ketone, 46, 80... 

The reaction of nitrosyl chloride with cyclopentene, cyclohexene, and cyclo-heptene in carbon tetrachloride solution at 5°C afforded the corresponding adducts in good yield, although during the cyclohexene reaction considerable hydrolysis to 2-chlorocyclohexanone took place and, in the case of cyclohep-tene, the crude product was not identified but rather was immediately subjected to levulinic acid hydrolysis to 2-chlorocycloheptene. From the products isolated, it may be inferred that cyclopentadiene adds nitrosyl chloride in a 1,4-manner in moderate yields [55]. 

Chlorofluorination of various alkenes and two acetylenes (phenylacetylene, methylphenylacety-lene) have been reported with an /V-chlorosaccharin/pyridine system.338 Depending on the substrate, the addition proceeds either exclusively anti or with high anti stereoselectivity. The reactivity of this system was initially tested in a reaction of cyclohexene. Reaction at room temperature or in an ice bath (10 min) results in a complete chlorofluorination to practically pure P an.s-l-chloro-2-fluorocyclohexane. 

The activity in consecutive cyclohexene reactions will now be compared. The data presented in Table 2 and in Figure 2 indicate that only strong Bronsted acid sites are active in this reaction. BOR 1, not containing strong sites, is inactive. The activity in consecutive reactions increases in the order BOR 1 < BOR 2 < H-ZSM-5, i.e., in the same order as the strong BrSnsted acid sites content. 

The study by Hitzler et al. has illustrated the broad scope of potential hydrogenation reactions in SC-Some of the substrates investigated included m-cresol, benzaldehyde, acetophenone, 1-octene, and cyclohexene. Reactions were performed in 5 and 10 ml packed bed reactors and space times of up to 300 hr were achieved. Residence times of this magnitude render the issue of scale-up largely irrelevant for small (kilogram) quantities of product in a continuous process. This is advantageous for the commercialization of SCF reaction processes because it minimizes development and capital costs. 

A simple (though not very efficient or convenient) cycloaddition reaction is the reaction of buta-1,3-diene with ethene to give cyclohexene (reaction 7.3). The reaction does not appear to involve significant charge build-up in the transition state, and it appears that both new bonds are being formed at the same time, since the reaction is stereospecific with cis addition across both unsaturated systems. 

Hatakeyama, S., Tanonaka, T., Weng, J., Bandow, H., Takagi. H., and Akimoto, H. (1985) Ozone-cyclohexene reaction in air quantitative analysis of particulate products and the reaction mechanism, Environ. Sci. Technol., 19,935-941. 

Kinetic studies on the gas-phase reactions of O3 with cycloakenes as a function of temperature have provided a reliable kinetic database for these reactions which may be used as an important input into chemical models for the reactions of O3 with alkenes under atmospheric conditions. The relatively high hydroxyl radical formation yields from the 03-cyclohexene reactions indicate that reactions of O3 with alkenes lead to the generation of OH radicals at night and hence allow the... 

C-H activation results in reaction of dimetallynes Ar EEAr [E = Ge, Sn Ar = C6H3-2,6-(C6H3-2,6-Pr 2)] with cyclopentadiene (CpH), cyclopentene, and 1,4-cyclohexadiene (CHD), but not readily with cyclohexene. Reaction of the diGermyne and diStannyne with Cp gave the cyclopentadienyl anion, bound in a ITT-fashion to a mononuclear group 14 element centre, along with evolution of... 

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