5,6-dimethoxy-1-(2-(4-nitro-1H-pyrazol-1-yl)ethyl)indoline → 1-(2-(5,6-dimethoxyindolin-1-yl)ethyl)-1H-pyrazol-4-amine

Participants

Reaction Steps

To a solution of 5,6-dimethoxy-1-(2-(4-nitro-1H-pyrazol-1-yl)ethyl)indoline (1.53 g, 4.81 mmol) in MeOH (50 mL), PtO2 (200 mg, 0.88 mmol) was added and the reaction mixture was stirred at rt under a H2-atmosphere for 1 h. The mixture was diluted with EtOH, filtered over celite and the filter cake was rinsed with MeOH. The filtrate was concentrated under reduced pressure to obtain 1-(2-(5,6-dimethoxyindolin-1-yl)ethyl)-1H-pyrazol-4-amine as a brown oil, which was used in the next step without further purification. LC-MS conditions B: tR=0.38 min, [M+H]+=289.18.

Provenance & Evidence