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Beilstein J. Org. Chem. 2021, 17, 527–539, doi:10.3762/bjoc.17.47
Graphical Abstract
Figure 1: Nintedanib ethanesulfonate.
Scheme 1: The known synthetic strategies leading to 3-(aminomethylidene)oxindoles.
Scheme 2: The possible intermediates and products occurring in the reactions of 3-bromooxindoles with thioben...
Figure 2: The R1 and R2 substitution influence on the isolated yields of products 5aa–ed.
Scheme 3: The Eschenmoser coupling reaction of 3-bromooxindole (1a) with thioacetamides.
Scheme 4: The synthesis of alternative 3-substituted oxindoles and their Eschenmoser coupling reaction with t...