Novel heterocyclic compound, and composition for treating inflammatory diseases using same

A heterocyclic compound represented by Chemical Formula 1 below:

• wherein
• R1 is selected from hydrogen, halogen, (C1-C7)alkyl, (C6-C12)aryl, (C3-C6)cycloalkyl, (C6-C12)ar(C1-C7)alkyl, and
• R2 and R3 each are independently selected from hydrogen, halogen, (C1-C7)alkyl, (C3-C6)cycloalkyl, (C6-C10)aryl, (C6-C12)ar(C1-C7)alkyl, (C1-C7)alkoxycarbonyl, (C1-C7)alkylamido(C1-C7)alkyl,
• R11, R12, R13, R14, R15 and R16 each are independently hydrogen, (C1-C7)alkyl, (C3-C6)cycloalkyl, (C6-C10)aryl, heterocycloalkyl(C6-C12)aryl, or (C3-C12)heteroaryl, and R11 and R12 and R14 and R15 may be linked to each other via alkylene, oxyalkylene, or aminoalkylene to form a 5-membered or 6-membered hetero ring;
• n is an integer of 1 to 4;
• (C6-C12)aryl of R2 and R3 and the hetero ring formed from R11 and R12 may be further substituted with halogen, hydroxy, (C1-C7)alkyl, (C6-C10)aryl, (C3-C6)cycloalkyl, 5- or 6-membered heterocycloalkyl, 5- or 6-membered heterocycloalkylcarbonyl, 5- or 6-membered cycloalkyl sulfonyl, 5- or 6-membered heteroaryl, (C1-C6)alkoxy, (C1-C7)alkoxycarbonyl, (C1-C7)alkylcarbonyl, (C3-C6)cyclo(C1-C7)alkylcarbonyl, (C6-C10)ar(C1-C7)alkylcarbonyl, (C3-C10)heteroarylcarbonyl, (C6-C10)arylcarbonyl, (C1-C7)alkylsulfonyl, amino(C1-C7)alkylcarbonyl, (C1-C7)alkyloxycarbonyl, (C6-C10)ar(C1-C7)alkyloxycarbonyl, amino(C1-C7)alkylamino, (C1-C7)alkylamido, (C1-C7)alkylcarbamoyl, (C1-C7)alkylsulfoneamido, or
• and
• R21 and R22 each are independently (C1-C7)alkyl, (C3-C6)cycloalkyl, or (C6-C12)aryl, or R21 and R22 may be linked to each other via alkylene to form a 5- or 6-membered hetero ring, or a pharmaceutically acceptable salt thereof.