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 5-amino-2-methylphenol (14 mg, 0.1137 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 36% yield (0.028 g, 0.0521 mmol).
