Heptamethylene

Type AABB Heptamethylene, Octamethylene N onamethylen Decamethylene Undecamethylene D 0 decanethylen... 

The heptamethylene glycol was separated by continuous ether extraction from the alkaline reduction solution after the latter had been diluted and distilled to remove the alcohol. The nonamethylene glycol was separated from the alkaline liquor by decantation (as above) and distilled. All the others were crystallized from benzene (without alcohol). Equally successful results have also been obtained with larger runs (e.g., 0.5 mole of ester),... 

Piccinini, therefore, adopted formula (XIV) for 0-pelletierine, which is based on Willstatter s tropinone formula (p. 77) by cliange from a heptamethylene to an octamethylene ring. ... 

Not only may tropane be extended externally, as in homotropme (. but a new methylene group may be inserted in the heptamethylene rinj thus Werner has shown that -pclleticrine (VII), on reduction in differe ways, yields two granatolines (VIII), corresponding, no doubt, to tropi... 

Synonyms Cycloheptan Cycloheptyl hydride EINECS 206-030-2 Heptamethylene NSC 5164 Suberane UN 2241. 

In a similar manner hexamethylene can be prepared from pimelic acid, and heptamethylene from suberic acid ... 

Poly(heptamethylene pimelamide (nylon 7,7) Poly(octamethylene suberamide) (nylon 8,8) Poly(hexamethylene sebacamide) (nylon 6,10) 303/323 469/487 478/498 488/506... 

Azelaic acid can be prepared by the oxidation of castor oil with nitric acid by the oxidation of ricinoleic acid with nitric acid and with alkaline permanganate by the oxidation of methyl oleate with alkaline permanganate by the ozonization of oleic acid and decomposition of the ozonide by the ozonization of methyl ricinoleate and decomposition of the ozonide by the action of carbon dioxide upon 1,7-heptamethylene magnesium bromide by the hydrolysis of i,7-di(yanoheptane. ... 

Yelamaggad et al reported the more elaborate acetylide complexes 164 (n = 3, 4, 5, 7), all of which showed a chiral nematic phase due to the presence of the chiral cholesteryl moiety. For all complexes, decomposition occurred somewhere above 200 °C—the lowest melting point was seen for the complexes with the two heptamethylene spacers. 

The residue obtained from step (2), containing the 2-(l-N, N-heptamethylene-imino)-acetic acid guanide, an intermediate, is duly suspended in tetrahydrofuran and added to a previously refluxing solution of 6 g LiAlH dissolved in tetrahydrofuran very slowly and carefully. Allow the refluxing to continue upto 30 minutes. 

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