The procedures described are dangerous and should not be attempted by persons inexperienced in Organic Laboratory techniques. Cool, extract with ether or benzene and evaporate in vacuum the extract to give 20 g 3,4,-methylenedioxybenzylmethyl ketone. Add 23 g of above ketone to 65 g formamide and heat at 190 degrees for five hours. Cool, add 100 ml H2o2, extract with benzene and evaporate in vacuum the extract. Can be extracted with simple distillation.
Hexane is used for recrystalization.