5-chloro-2-methyl-2,3-dihydroinden-1-one

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

Procedure: According to Example 1 (a), 28.0 g (0.155 mole) of 5-chloro-2-methyl-1-indanone and 180 ml of fuming nitric acid yield the nitro compound having a melting point of from 75° to 78° C., which after recrystallization from ethanol rises to 87° to 89° C.

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

Procedure: According to Example 1 (a), 28.0 g (0.155 mole) of 5-chloro-2-methyl-1-indanone and 180 ml of fuming nitric acid yield the nitro compound having a melting point of from 75° to 78° C., which after recrystallization from ethanol rises to 87° to 89° C.

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

Procedure: 5.5 g of N′-(5-chloro-2-methylindan-1-ylidene)-N,N-dimethylhydrazine are emulsified in 100 ml of 2N sulfuric acid and boiled under reflux for 4 h. The cooled reaction mixture is cautiously extracted with ethyl acetate; the organic extract is extracted several times with saturated sodium bicarbonate solution, dried over sodium sulfate, filtered, dried in vacuo and chromatographed on silica gel with ethyl acetate/hetpane ⅕. 5-Chloro-2-methylindan-1-one is obtained as an oil. under reflux for 4 h The cooled reaction mixture is cautiously extracted with ethyl acetate the organic extract is extracted several times with saturated sodium bicarbonate solution dried over sodium sulfate filtered dried in vacuo chromatographed on silica gel with ethyl acetate/hetpane ⅕

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

Procedure: According to Example 1 (a), 28.0 g (0.155 mole) of 5-chloro-2-methyl-1-indanone and 180 ml of fuming nitric acid yield the nitro compound having a melting point of from 75° to 78° C., which after recrystallization from ethanol rises to 87° to 89° C.