6-Methoxyindoline is primarily used as an intermediate in the synthesis of more complex chemical compounds. It plays a significant role in the pharmaceutical industry, where it is utilized in the development of various drugs, particularly those targeting the central nervous system. Its structure is valuable in creating compounds with potential therapeutic effects, such as antidepressants, antipsychotics, and other neuroactive agents. Additionally, it finds application in organic chemistry research for the construction of indole-based frameworks, which are essential in the study of natural products and bioactive molecules. Its methoxy group enhances its reactivity, making it a versatile building block in synthetic chemistry.