par Descamps, Claude ;Martin, Richard
Référence Bulletin des Sociétés chimiques belges, 61, 7-8, page (352-360)
Publication Publié, 1952
Article révisé par les pairs
Résumé : Summary. ‐ 5,8‐dimethyl‐1,2,6,7‐dibenzphenanthrene has been synthesised, starting from 9,10‐dihydrophenanthrene, by the following steps: Friedel‐Crafts reaction with phthalic anhydride [2‐(9,10‐dihydrophenanthroyl)‐o‐benzoic acid (VIIa)], cyclisation with benzoyl chloride containing a small amount of conc. sulfuric acid [1,2‐(2′,1′‐naphto) [anthraquinone (IX)], treatment of the quinone with CH3MgI followed by HI and SnCl2+HCl [5,8‐dimethyl‐1,2,6,7‐dibenzphenanthrene, (Xb)]. 2‐(9,10‐dihydrophenanthroyl)‐o.benzoic acid (VIIa) and 2‐phenanthroyl‐o.benzoic acid (VIIIb) both gave 2‐phenanthroic acid when submitted to potash fusion. Attempts to prepare 1‐anthrylacetic acid have so far failed. Copyright © 1952 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim