Highly hydrogenated ring-products

It should be noted that these models only consider the cyclic carbon structure no heteroatoms or side chains have been included. Though this may not be totally accurate one very important observation is that the extent of ring condensation increases dramatically. This implies that the portion of coal which becomes hexane insoluble (SRC) products is extensively dehydrogenated even when high hydrogen content process derived solvent (92-26-019) is used. 

Since 1991, Nippon Zeon Co. has been producing the polymer Zeonex, obtained by ROMP of norbomene and related (multi-ring) monomers, followed by hydrogenation. The product is an amorphous, colorless, transparent polymer with a high Tg (140 °C) and low moisture absorption. These properties make it very suitable for optical applications (e. g., disks, lenses, and prisms). 

Treatment of 2,5-anhydro-3,4-di-0-benzyl-1 -deoxy-1 -tritylamino-D-glucitol with mesyl chloride, tosic acid-methanol, triethylamine then hydrogen-palladium catalyst affords the 1,6-imino-bridged derivative The reaction of l,2 5,6-dianhydro-3,4-0-isopropylidene-D-mannitol with ben-zylamine followed by deprotection leads only to the seven-membered azepane 52 in high yield. Other l,2 5,6-dianhydro-3,4-0-isopropylidene hexitols gave similar results. No six-membered ring products were detected as is the case with 1,2 5,6-dianhydro-3,4-di-( -benzyl-D-mannitol (see Vol. 28, p. 230, ref. 63). ... 

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