Cyclohexene Cymene

Figure 12.13 Pyrogram of a natural rubber latex paint. Peak assignments 1, isoprene 2, toluene 3, xylene 4, 4 ethenyl 1,4 dimethyl cyclohexene 5, limonene 6, dehydro p cymene...

Triethyl- and triphenylphosphine have been used for deoxygenation not only of hydroperoxides to alcohols but also of dialkyl peroxides to ethers, of diacyl peroxides to acid anhydrides, of peroxy acids and their esters to acids or esters, respectively, and of endoperoxides to oxides [290] in good to excellent yields. The deoxygenation of ascaridole to l-methyl-4-isopropyl-l,4-oxido-2-cyclohexene [290] was later challenged the product is claimed to be p-cymene instead [668]). 

In the essential oil, apart from cuminaldehyde, perilla aldehyde (4-(l-methyl-ethenyl)-l-cyclohexene-l-carboxaldehyde), cumin alcohol or 4-isopropylbenzyl alcohol, a-pinene and /3-pinene (21%), dipentene, p-cymene, /3-phellandrene and limonene (Fig. 11.1) have been reported by Baser et al. (1992). 

The cyciomaitodextrins (a-CD, -CD, and y-CD) can be selectively obtained from a fermentation culture or an enzyme digest of cyclomaltodextrin glucanotransferase reaction with solubilized starch. The majority of the cyclomaltohexaose (a-CD) can be separated from cycloma-Itoheptaose (/3-CD) and y-CD by their selective precipitation with p-cymene from the culture supernatant or from an enzyme digest [168]. The a-CD can then be precipitated from the supernatant with cyclohexene, which is extracted with acetone to remove the cyclohexene and the a-CD can be crystallized from water or a propanol-1/water solution [169]. The p-cymene precipitates of /3-CD and y-CD are put into a water solution and /3-CD selectively precipitated from y-CD with fluorobenzene. The y-CD is then precipitated with anthracene saturated in diethyl ether. After the removal of the fluorobenzene from /3-CD with acetone or ethanol extraction, /3-CD can be crystallized from water, and after the removal of anthracene with acetone or ethanol extraction from y-CD, it can also be crystallized from water [170,171]. The selective precipitations of the cyciomaitodextrins with various organic molecules is based on the selective formation of complexes of the organic molecules with the specific sizes of the cyciomaitodextrins and the relatively hydrophobic interior cavities of the cyciomaitodextrins [166,167,168]. 

CH=CH Cyclohexene Cycloheptatriene Benzene, Xylene, p-Cymene (CsH,)sC-Divinylacetylene Alkoxides... 

Apiezon CH2 = CH2 CH=CH Divinylacetylene Cycloalkenes Cyclohexene Cycloheptatriene Benzene, Toluene, Xylene, p-Cymene PhgC ... 

Mesitylene (—) Durene f (0.08) p-Cymene (—) p-Cymene (1) Benzyl chloride (—) Benzyl chloride (0.07) p-Cymene (—) Cyclohexene (0.2) p-Cymene (—) AICI3 (trace) AICI3 (—) AICI3 (0.1)... 

Preparation by oxidation of 5-acetyl-3-methyl-2-cyclohexen-l-one with air in alkaline medium or by catalytic hydrogenation of the latter in the presence of Pd/C in p-cymene [2660]. 

Methyl methacrylate homopolymet Methyl methacrylate polymer Methyl methacrylate polymers Methyl methacrylate resin. See Polymethyl methacrylate 2-Methyl-3-(para-methoxy phenyl)-ptopanal. See Canthoxal a-Methyl-ro-methoxypolydimethylsiloxane. See Dimethylsiloxane 1 -Methyl-4 (1 -methylethenyl) cyclohexene. See dl-Limonene 1-Methyl-4-(1-methylethenyl)-(S)-cyclohexene. See l-Limonene (R)-1-Methyl-4-(1-methylethenyl)-cyclohexene. See d-Umonene 1-Methyl-4-(1-methylethyl) benzene. See p-Cymene 1-Methyl-4-(1-methylethylidene) cyclohexene. See Terpinolene Methyl-2(methyl-2) oxybispropanol. See Dipropylene glycol Methyl-2-methyl-2-propenoate. See Methyl methacrylate Methylmorpholine 4-Methyl morpholine N-Methyl morpholine. See p-Methyl morpholine p-Methyl morpholine CAS 109-02-4 EINECS/ELINCS 203-640-0 UN 2535 (DOT)... 

---