2,3,3-trimethyl-1,2-dihydroindole

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 5.2 g (32 mmol) of 2,3,3-trimethylindoline and 15.8 g (48 mmol) of octadecylammonium bromide was heated with stirring followed by treating with a solution of 8 g of sodium hydroxide in 50 ml of water. After usual working-up, there were obtained 4.2 g of the title compound in a 84.1% yield. was heated