| 摘要 |
<p>Alkenyl cycloalkanes are obtained from alkenyl cycloalkenes by forming an adduct with a polycyclic fused ring hydrocarbon having two mess carbon atoms in 1 : 4 relationship in an aromatic ring, hydrogenating the olefinic link in the cycloolefinic ring and pyrolysing the adduct. The cycloolefinic group may be mono-or bi-cyclic containing 5-8 carbon atoms in each ring, the alkenyl group may contain 2-18 carbons and other C1-C5 alkyl groups may be present as ring substituents. Anthracene is the preferred polycyclic hydrocarbon, others are also specified. The adduct is formed by heating the ingredients at 150-275 DEG C. and 50-5,000 p.s.i. for 4-16, preferably with one reactant in an excess, e.g. up to a mol ratio of 2 : 1. An inert hydrocarbon solvent may be present in an amount of 1-100 parts per part of alkenyl cycloalkene. Reduction is effected at 30-150 DEG C. and a hydrogen pressure of 50-5,000 p.s.i. for 0.5-8 hours in the presence of a catalyst, e.g. Raney nickel, others also being specified. Pyrolysis is effected at 250-450 DEG C. for 2-60 minutes. 9,10-dihydro - 9,10 - (cyclohex-3-enyl)-ethano anthracene, the adduct of anthracene and 4-vinylcyclohexene is stated to be a novel compound.</p> |
