Compound, polymer, photosensitive resin composition, and color filter

A compound represented by Chemical Formula 1′:

• wherein, in Chemical Formula 1′,
• R1 to R4 are each independently a hydrogen, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, a substituted or unsubstituted C2 to C20 heteroaryl group or a group represented by Chemical Formula 2, at least one of R1 to R4 being a group represented by Chemical Formula 2,
• wherein, in Chemical Formula 2,
• L1 is a substituted or unsubstituted C1 to C20 alkylene group,
• L2 is a single bond, a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C3 to C20 cycloalkylene group, or a substituted or unsubstituted C6 to C20 arylene group, and
• R5 is a substituted or unsubstituted C3 to C20 cycloalkyl group or a substituent including an ethylenic unsaturated double bond, and
• Y is *—SO2NSO2CF3, and
• wherein * is a bonding site.