Methyl 1-acetyl-2-oxoindoline-6-carboxylate

Methyl 1-acetyl-2-oxoindoline-6-carboxylate is an N-acetylated oxindole ester used in nintedanib-related synthesis. The oxindole framework supplies the ring system and reactive C3 position for construction of the substituted exocyclic fragment. The methyl ester preserves the carboxyl functionality required later, while N-acetylation controls the lactam nitrogen during intermediate formation.

This is a protected oxindole-stage material rather than nintedanib itself. Its ketolactam framework, N-acetyl substituent and aromatic ester occupy different roles within the route: ring chemistry builds the C3 substituent, nitrogen protection moderates competing transformations, and the ester retains the acid-derived group. These distinctions make its protection state important when comparing it with methyl oxindole-6-carboxylate.

Typical Applications

• Nintedanib oxindole-fragment preparation: Used in synthetic sequences that elaborate the oxindole C3 position while retaining the aromatic carboxylate ester and the selected nitrogen protection state.
• Protected oxindole route studies: Used to compare N-protected intermediate formation and subsequent deacetylation, separating ring-substitution chemistry from regeneration of the lactam NH.

Specifications

Specifications describe the standard grade. Tolerance, test method and documentation package are confirmed per order.