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

HRID 366667Notes

Reaction equation

HRID 366667 reaction equation
[OH:1][CH2:2][C:3]#[C:4][C:5]1[C:13]([N+:14]([O-])=O)=[CH:12][CH:11]=[C:10]2[C:6]=1/[C:7](=[CH:18]/[C:19]1[NH:20][CH:21]=[CH:22][C:23]=1[O:24][CH3:25])/[C:8](=[O:17])[NH:9]2.[Cl-].[NH4+]>O.CO.[Zn]>[NH2:14][C:13]1[C:5]([C:4]#[C:3][CH2:2][OH:1])=[C:6]2[C:10](=[CH:11][CH:12]=1)[NH:9][C:8](=[O:17])/[C:7]/2=[CH:18]\[C:19]1[NH:20][CH:21]=[CH:22][C:23]=1[O:24][CH3:25]

Participants

6

Reactant 2

HCID 25517Ammonium ChlorideHCID 9949778(Z)-1,3-dihydro-4-(3-hydroxy-1-propynyl)-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-5-nitro-2H-indol-2-one

Product 1

HCID 9883118(Z)-5-amino-1,3-dihydro-4-(3-hydroxy-1-propynyl)-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-2H-indol-2-one

Reagents, catalysts & solvents 3

HCID 23994ZincCatalystHCID 887MethanolSolventHCID 962WaterSolvent

Procedure

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%).

Workup

  1. temperaturewith heating
  2. temperatureat reflux for 2 h

Sources & evidence

ORD record
ord-74d36b9f16644379a933d2f600382b7c
Source dataset
uspto-grants-2000_10
Patent number
US06130239

Reaction notes

Loading…