Trimethyl cyclopentane

Camphoric acid (l,2,2-trimethyl-cyclopentan-lr,3c-dicarboxylic acid)... 

The rearrangement and formation of 2,2-dimethylbutane—with a quaternary carbon atom—is only possible via the above mechanism. Over platinum, 2,3-dimethylbutane (75) gave more benzene over palladium, 2,2-dimethylbutane (97a) gave more benzene. This is the opposite selectivity, as reported by Muller and Gault, for ring expansion of 1,1,3-trimethyl-cyclopentane (57). This may be more evidence that at least two different types of bond shift mechanism can occur. 

Trimethyl cyclopentane 5-Methyl-3-heptanone sec-Hexyl acetate... 

Shibuya H, Fujioka H, Yamamoto Y, Suzuki K, Kitagawa I, Chemical ttansfotmation of tetpenoids, IV, Acid tteatment of (3./ )-1-vinyl-, (3f )- 1-hydtoxyptopenyl and (3./ )-1 -epoxyethyl-5-methoxy-1,2,2-trimethyl-cyclopentane derivatives Ring enlargement relations and successive migrations of methyl residues, Chem Pharm Bull 30 1280—1288, 1982. 

The thermal polymerization of isobutylene (at 370-460° and 540-5350 p.s.i.) is of particular interest because it yields 1,1,3-trimethyl-cyclopentane rather than 2,4,4-trimethyl-l- and -2-pentene (McKinley et al., 11). This cyclic dimer amounted to as much as 45.9% of the total liquid product when the reaction was carried out at 400° and 540 p.s.i. It was suggested that its formation might involve one of three mechanisms ... 

Figure 2. The content of a) Cg paraffins and naphthenes b) Cg aromatics c) components and d) Cg. aromatics in the naphthas as a function of the final boiling point (FBP). C8P=Cg paraffins PCP=propylcyclopentane C8CP=ethylmethyl- and trimethyl-cyclopentanes ECH=ethylcyclohexane DMC=dimethylcyclohexane EB=ethylbenzene PX,MX,OX=xylenes.

Dicarboxy-l, 2,2-trimethyl-cyclopentan 64% (bei basischcr Hydrolyse)36 32% (bei saurer Hydrolyse)36... 

Die bei der Ozonolyse von a-Hydroxymethylen-ketonen auftretenden 1,2-Diketone konnen in geeigneten Losungsmitteln in Anhydride iibergefuhrt werden. Die Reaktion wurde am 3-Hydroxymethylen-campher eingehend untersucht (1,2,2-Trimethyl-cyclopentan-1,3-dicarbonsdure-anhydrid 56%)112. 

Diisobutylene trans -1,2- Dimethyl -cyclohexane CIS-1 -Ethyl-2 -methyl -cyclopentane trans-1-Ethyl-2-methylcyclopentane trans-1 -Ethyl-3 -methylcyclopentane 1,1,2 -Trimethyl -cyclopentane... 

Not all instances of conformational polymorphism are as dramatic as that just described, and often different conformers of a single side chain are able to pack into different crystalline arrangements. For instance, the two polymorphs of/>-(li ,3 S)-3-thioanisoyl-l,2,2-trimethyl-cyclopentane carboxylic acid were found to be associated with different conformations of the carboxylate group [15], Torsion about a single C-N bond was shown to be the origin of the polymorphism detected for lomeridine dihydrochloride [16], Finally, relatively small differences in molecular conformation were detected for the two polymorphic and four solvated crystalline forms of spironlactone [17],... 

Trimethyl-cyclopentan 5 116. l-Methyl-2-iaobutyl-cyclopropan 5 116. l-Methyl-l,2-diathyI-cyclopropan S 116. booktonaphthen aua kaukasiachem Fetro ... 

Monometbyleater der 1.2.2-Trimethyl. cyclopentan-carbonsiiure-(l)-[ -propion) a ure].(3) 9 II545. 

Trimethyl-l, 3-cyclo-pentanedicarboxylic (cam- 1,3-Diamino-2,2,3-trimethyl-cyclopentane 75% ... 

C12H20O4 l,2,2-trimethyl-cyclopentane-l,3-dicarboxylic acid dimethyl ester 20221-16-3 ... 

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