Novel indoline derivative and use thereof

A method for preparing an indoline derivative represented by Chemical Formula 1, comprising:

• 1) a step of replacing the hydrogen atom of a hydroxyl group of an indirubin oxime derivative represented by Chemical Formula 2 with a C1-6 alkyl group substituted with a C1-6 haloalkyl group, a tosyl group (OTs) or a cyano group;
• and
• 2) a step of adding a 5- to 7-membered aromatic or non-aromatic heterocyclic compound comprising 1 to 3 heteroatoms selected from O, N, S, SO and SO2 to the resultant product of the step 1) to obtain an indoline derivative represented by Chemical Formula 1:
• wherein
• A is a 5- to 7-membered aromatic or non-aromatic heterocyclic group comprising 1 to 3 heteroatoms selected from O, N, S, SO and SO2;
• the aromatic or non-aromatic heterocyclic group may be substituted or unsubstituted with one or more substituent selected from a group consisting of hydrogen, a halogen group, a hydroxyl group (—OH), a carboxyl group, and a C1-6 alkyl group;
• and
• n is an integer from 1 to 4.