abstract |
PROCESS FOR PREPARING A POLYALCOYL PYRYLIUM SALT CONTAINING AT LEAST 3 ALKYL REMAINS IN POSITION 2, 4, 6, BY REACTION OF A RAMIFIED ALKAN CONTAINING AT LEAST ONE TERTIARY CARBON ATOM WITH AN ALKANOYL HALOGENIDE OR AN ANOENIDE AND ALKANOYL ANOHYDRIDE ALCOHOL, IN THE PRESENCE OF LEWIS ACID. |