Ammonium Chloride → (Z)-5-amino-1,3-dihydro-4-(3-hydroxy-1-propynyl)-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-2H-indol-2-one

Participants

Reaction Steps

Using Method L above, (Z)-1,3-dihydro-4-(3-hydroxy-1-propynyl)-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-5-nitro-2H-indol-2-one (63 mg, 0.19 mmol) (from Example 30 above) was reduced with zinc (0.11 g, 1.67 mmol) and ammonium chloride (22.4 mg, 0.42 mmol) in 10% water in methanol (10 mL) with heating at reflux for 2 h to give (Z)-5-amino-1,3-dihydro-4-(3-hydroxy-1-propynyl)-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-2H-indol-2-one. (Yield 18 mg, 40%).

Provenance & Evidence