ABSTRACT
Nintedanib esylate is synthesized via novel intermediates of (Z)-methyl 3-(acetoxy-phenyl)methylene)-1-acetyl-2-oxoindoline-6-carboxylate and N-(4-aminophenyl)-2-chloro-N-methylacetamide in good yields.
GRAPHICAL ABSTRACT
Acknowledgment
The authors are grateful to Suven Life Sciences management for allowing them to publish these results.