Polycyclic systems. Part XVI. Synthesis of 1-isopropyl-2,8-dimethylphenanthrene
Abstract
An unambiguous synthesis of 1-isopropyl-2,8-dimethylphenanthrene from 2-isopropyl-1,3-dimethylbenzene is described in which 3,4-dihydro-5-isopropyl-6-methylnaphthalen-1(2H)-one serves as a key intermediate. This hydrocarbon is different from one previously encountered by Short and Wang to which this formulation was ascribed. An error in the literature regarding the synthesis of this phenanthrene is corrected.