Water → 6,7-Dimethyl-5-methoxy-1,3-dihydro-2H-indole-2-one

Participants

Reaction Steps

To a solution of 6,7-dimethyl-5-methoxy-3(methylthio)-1,3-dihydro-2H-indole-2-one (30 g, 126 mmol) in dichloromethane (600 mL) were added triphenylphosphine (40 g, 153 mmol) and toluenesulfonic acid monohydrate (29 g, 153 mmol) at room temperature, and the mixture was stirred for 3 hours. The reaction solution was poured into cool water, and the precipitated crystals were filtered. The crystals were washed with dichloromethane and water to obtain 17.5 g of the title compound.

Provenance & Evidence