HETEROCYCLE SUBSTITUTED BENZENE DERIVATIVE, ITS INTERMEDIATES AND METHOD AND FOR PRODUCING THE SAME DERIVATIVE

PROBLEM TO BE SOLVED: To provide a benzene derivative that is useful as intermediate, such as medical and agrochemical supplied, liquid crystal, heat-resistance polymer and liquid crystal polymer. SOLUTION: A compound of formula (5) that is produced by the synthetic routes of 1 to 4, and its production method are provided. [In the synthetic routes, X shows heterocycle that is substituted by 5 or 6-membered ring having at least one of N, O, and S, Y shows CO2R6, CN, NO2, SO3R6, SO2NR4R5, SOR6 or SO2R6. R1, R2, and R3 show each H or a substitutable 1-6C alkyl group. R4, R5 and R6 show each a substitutable 2-6C alkyl group or a substitutable phenyl group that may form a 4 to 7-membered ring compound by R4 and R5].