5-hydroxy-1,3-dimethyl-3H-indol-2-one

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A process for the preparation of eserethole of formula ##STR7## which comprises the steps of: a) acylating the compound II 1,3-dimethyl-5-hydroxy-oxindole to obtain 1,3-dimethyl-5-acyloxy-oxindole (III);

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A process for the preparation of eserethole of formula ##STR7## which comprises the steps of: a) acylating the compound II 1,3-dimethyl-5-hydroxy-oxindole to obtain 1,3-dimethyl-5-acyloxy-oxindole (III);

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A process for the preparation of eserethole of formula ##STR7## which comprises the steps of: a) acylating the compound II 1,3-dimethyl-5-hydroxy-oxindole to obtain 1,3-dimethyl-5-acyloxy-oxindole (III);