ANTHRAQUINONE DERIVATIVE AND ANTHRAQUINONE DYE

摘要

NEW MATERIAL:A compound of formula I (R1-R3 are 1-4C alkyl). EXAMPLE:The compound of formula II. USE:A greenish blue dye useful for coloring sublimation thermographic transfer recording, liquid crystals, cellulose, cellulose acetate, polyester, PS, etc. PREPARATION:For example, a compound of formula III is reacted with a diglycol of formula IV, e.g. neopentyl glycol, preferably in an excess amount in the presence of a basic substance, e.g. sodium methylate, at 130-180 deg.C.