144404-63-7Relevant articles and documents
Synthesis of Substituted Chrysenes
Mitra, Ashutosh,Ghosh, Swati
, p. 26 - 28 (2007/10/02)
Syntheses of 3-ethyl-9-methylchrysene (9) and 1,3,9-trimethylchrysene (9a) are described. 2-(7'-Ethyl-1'-naphthyl)ethyl bromide (6) and 2-(5',7'-dimethyl-1'-naphthyl)ethyl bromide (6a) were condensed separately with 2-carbethoxy-5-methylcyclohexanone to afford ethyl α,α-(4-methyl-2-cyclohexanone)-γ-(7'-ethyl-1'-naphthyl)butyrate (7) and ethyl α,α-(4-methyl-2-cyclohexanone)-γ-(5',7'-dimethyl-1'-naphthyl)butyrate (7a) respectively.PPA cyclisation of 7 gave a mixture of 8 and 8b while that of 7a gave only 8a.Catalytic dehydrogenation of 8 and 8b afforded 9 and that of 8a gave 9a.The products were characterised by physical data.