COLORING COMPOSITION, INKJET RECORDING INK AND HETEROCYCLIC COMPOUND

摘要

Disclosed is a coloring composition containing no heavy metal and having excellent light fastness. Also disclosed are an inkjet recording ink and a heterocyclic compound useful as a functional material such as a pharmaceutical product, agrochemical, dye, pigment, ultraviolet absorbent and liquid crystal, or a synthesis intermediate of such a functional material. Specifically disclosed is a compound represented by the general formula (I) below. Also specifically disclosed is a coloring composition containing at least one of such compounds and a medium. general formula (I) (In the formula, R1, R2, R3, R4, R5 and R6 independently represent a hydrogen atom or a monovalent substituent, and R1 and R2 and/or R3 and R4 may respectively combine together to form a ring; and X1, X2, X3 and X4 independently represent an optionally substituted heteroatom.)