Naphthalene 1,2,3,4,5,6,7,8-octahydro

Methyl-l,3-cyclohexanedione has been used as starting material for the syntheses of several polycyclic compounds for projected syntheses of steroids and terpenoids.11-13 It has also been used to prepare l -diketo-Sa-methyl-l a-octahydro-naphthalene.3 4- 16... 

In this example, names (i) and (ii) need the additional octahydro prefix because the available parent hydrides for these constructions (triazatriborinine and naphthalene, respectively) are mancude (i.e. have the maximum number of non-cumulative double bonds). 

Ethylene has been co-polymerized with a range of cycloolefms, including cyclobutene,596 cyclopentene,596 cyclohexene,597 norbornene (NB),596 5-phenyl-2-norbornene,598 5-vinyl-2-norbornene,599 5-ethylidene-2-norbornene,600 dimethano-octa-hydro-naphthalene,601 phenyldimethano-octahydro-naphthalene,598 and norbornadiene.602 Several non-conjugated cyclodiolefins have been co-polymerized as well.603... 

The number of possible octahydro derivatives of the monomethyl-and dimethylnaphthalenes is so large that identification is impractical. With naphthalene, however, analysis is possible. Not only are the six octalin isomers identifiable (66), but eventually all were detected in the products of partial hydrogenation of naphthalene with a ruthenium-on-alumina catalyst at 75° and 1000 psig. The results obtained by gas chromatography are shown in Table VIII. All six isomers were detected... 

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