3-Aminophenol → 5-Acetyl-thiophene-2-carboxylic acid (4-{3-[(3-hydroxy-phenylamino)-methylene]-2-oxo-2,3-dihydro-1H-indole-6-carbonyl}-phenyl)-amide

Participants

Reaction Conditions

Reaction Steps

A small screw cap test tube was charged with 5-Acetyl-thiophene-2-carboxylic acid [4-(3-hydroxymethylene-2-oxo-2,3-dihydro-1H-indole-6-carbonyl)-phenyl]-amide (as prepared in Example 34, 40 mg, 0.093 mmol) and THF (2 mL). To the resulting solution was added 3-aminophenol (13 mg, 0.1191 mmol), and the mixture was stirred for 24 h at 65° C. Subsequently, the reaction mixture was cooled to room temperature and concentrated in vacuo. The solid residue was recrystallized with ˜2 mL of i-prOH affording the title compound in 64% yield (0.031 g, 0.0592 mmol).

Provenance & Evidence