Azo compound, tautomer thereof, and azo dye

摘要

An azo compound or a tautomer thereof, wherein the azo compound is represented by the following Formula (1). In Formula (1), R¹ represents a hydrogen atom, alkyl group, aryl group, acyl group, carbamoyl group, alkylsulfonyl group, arylsulfonyl group, or heterocyclic group; R² represents -NR⁵R⁶ or -OR⁷; R⁵ and R⁶ each independently represent a hydrogen atom, alkyl group, aryl group, acyl group, carbamoyl group, alkylsulfonyl group, or arylsulfonyl group; R⁷ represents an alkyl group or aryl group; R³ represents a hydrogen atom, alkyl group, aryl group, alkoxy group, aryloxy group, acylamino group, carbamoylamino group, alkylsulfonylamino group, or arylsulfonylamino group; n is an integer of 3 to 5; and each R⁴, of which there are n in number, independently represents an alkyl group, aryl group, alkoxy group, aryloxy group, amino group, alkylthio group, arylthio group, acylamino group, alkylsulfonylamino group, or arylsulfonylamino group, and one R⁴ may bind to another R⁴ forming a ring.