N-Isopropylphthalimide

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3-Hydroxy-2-isopropyl-2,3-dihydroisoindol-1-one is prepared as described in Example 1, starting with 4.0 g of N-isopropylphthalimide in 20 cm3 of methanol and 1.1 g of potassium borohydride. The reaction mixture is stirred at a temperature in the region of 20° C. for 20 hours and is then cooled to a temperature in the region of 0° C. and distilled water is added dropwise. The solvent is then evaporated to dryness under reduced pressure (2 kPa) at a temperature in the region of 35° C. 6.1 g of 3-hydroxy-2-isopropyl-2,3-dihydroisoindol-1-one are thus obtained in the form of a white wax. (Rf=0.65, thin layer chromatography on silica gel, eluent: cyclohexane/ethyl acetate (30/70 by volume)). 3-Hydroxy-2-isopropyl-2,3-dihydroisoindol-1-one is prepared is then cooled to a temperature in the region of 0° C. distilled water is added dropwise The solvent is then evaporated to dryness under reduced pressure (2 kPa) at a temperature in the region of 35° C

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3-Hydroxy-2-isopropyl-2,3-dihydroisoindol-1-one is prepared as described in Example 1, starting with 4.0 g of N-isopropylphthalimide in 20 cm3 of methanol and 1.1 g of potassium borohydride. The reaction mixture is stirred at a temperature in the region of 20° C. for 20 hours and is then cooled to a temperature in the region of 0° C. and distilled water is added dropwise. The solvent is then evaporated to dryness under reduced pressure (2 kPa) at a temperature in the region of 35° C. 6.1 g of 3-hydroxy-2isopropyl-2,3-dihydroisoindol-1-one are thus obtained in the form of a white wax. (Rf=0.65, thin layer chromatography on silica gel, eluent: cyclohexane/ethyl acetate (30/70 by volume)). 3-Hydroxy-2-isopropyl-2,3-dihydroisoindol-1-one is prepared is then cooled to a temperature in the region of 0° C. distilled water is added dropwise The solvent is then evaporated to dryness under reduced pressure (2 kPa) at a temperature in the region of 35° C

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3-Hydroxy-2-isopropyl-2,3-dihydroisoindol-1-one is prepared as described in Example 1, starting with 4.0 g of N-isopropylphthalimide in 20 cm3 of methanol and 1.1 g of potassium borohydride. The reaction mixture is stirred at a temperature in the region of 20° C. for 20 hours and is then cooled to a temperature in the region of 0° C. and distilled water is added dropwise. The solvent is then evaporated to dryness under reduced pressure (2 kPa) at a temperature in the region of 35° C. 6.1 g of 3-hydroxy-2-isopropyl-2,3-dihydroisoindol-1-one are thus obtained in the form of a white wax. (Rf=0.65, thin layer chromatography on silica gel, eluent: cyclohexane/ethyl acetate (30/70 by volume)). 3-Hydroxy-2-isopropyl-2,3-dihydroisoindol-1-one is prepared is then cooled to a temperature in the region of 0° C. distilled water is added dropwise The solvent is then evaporated to dryness under reduced pressure (2 kPa) at a temperature in the region of 35° C