5-bromo-2,3-dihydro-1H-inden-1-ol

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: 9.6 g of 5-bromo-1-hydroxyindane was dissolved in 100 ml of dry methylene chloride. To the solution were added, at room temperature, 570 mg of pyridinium p-toluenesulfonate and 4.5 ml of 3,4-dihydro-2H-pyran. The resulting mixture was stirred at the same temperature for 3 hours. The reaction mixture was added to ice water. The organic layer was separated, washed with a saturated aqueous sodium chloride solution, and dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure. The residue thus obtained was purified by column chromatography (eluant: toluene/ethyl acetate=15/1) to obtain 13.1 g of oily 5-bromo-1-(tetrahydropyran-2-yloxy)indane. To the solution were added, at room temperature The organic layer was separated washed with a saturated aqueous sodium chloride solution dried over anhydrous magnesium sulfate The solvent was removed by distillation under reduced pressure The residue thus obtained was purified by column chromatography (eluant: toluene/ethyl acetate=15/1)

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: 5-bromo-2,3-dihydro-1H-inden-1-one (2.0 g) was dissolved in methanol (20 mL), and to the resultant solution, sodium borohydride (0.54 g) was added at room temperature, followed by stirring the resultant reaction mixture at room temperature for 14 hours. To the reaction mixture, 1M hydrochloric acid (50 mL) was added, followed by extracting the resultant reaction mixture with ethyl acetate (50 mL) three times, and the organic phase was washed sequentially with water (50 mL) and a saturated saline (50 mL) and was dried over anhydrous sodium sulfate. From the organic phase, the solvent was distilled off under reduced pressure to obtain the subject compound (2.0 g) as a pale yellow solid. reaction mixture at room temperature for 14 hours by extracting the resultant reaction mixture with ethyl acetate (50 mL) three times the organic phase was washed sequentially with water (50 mL) a saturated saline (50 mL) and was dried over anhydrous sodium sulfate From the organic phase, the solvent was distilled off under reduced pressure

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

Procedure: To a solution of 5-bromoindanone (2.2 g, 0.01 mol) in a mixture of methanol (50 mL) and tetrahydrofuran (10 mL) was added sodium borohydride (0.78 g, 0.02 mol) and the reaction mixture was stirred at room temperature overnight. The solution was concentrated and the residue was partitioned between water and ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate and filtered. The filtrate was concentrated to give 2.15 g of crude material. 1H NMR (300 MHz, CDCl3) 6 ppm 157 (s, 1 H) 1.87-2.02 (m, 1 H) 2.40-2.59 (m, 1 H) 2.73-2.88 (m, 1 H) 2.95-3.11 (m, 1 H) 5.12-5.25 (m, 1 H) 7.29 (s, 1 H) 7.32-7.43 (m, 2 H). MS (ESI), m/z 416.0 (M+205)+. The solution was concentrated the residue was partitioned between water and ethyl acetate The organic layer was washed with brine dried over magnesium sulfate filtered The filtrate was concentrated

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

Procedure: A 1 L three-neck round bottom flask equipped with a condenser, magnetic stir bar, nitrogen inlet, and a thermometer was charged with 5-bromo-1-indanol (56.5 g, 0.265 mol), toluene (300 mL), pyridine (250 mL, 3.1 mol), and p-toluenesulfonyl chloride (55.3 g, 0.29 mol). The mixture was stirred and heated to reflux while dehydration progress was followed by GC. After 7 hours at reflux the dark colored reaction mixture was cooled, quenched by pouring over ice-water (700 mL) containing HCl (12M, 200 mL) and extracted several times with diethyl ether (3×250 mL). The combined diethyl ether extracts were washed repeatedly with water, 5% sodium bicarbonate (aqueous), and water then dried over anhydrous magnesium sulfate. Evaporation of diethyl ether followed by vacuum distillation (80° C./0.5 mm Hg) gave 5-bromoindene (24.0 g, 99+% purity by GC) as a colorless oil. 1HNMR (CD2Cl2, 500 MHz) δ7.59 (br s, 1H); 7.38 (dd, JAB=1.5, 8 Hz, 1H), 7.26 (d, JAB=8 Hz, 1H); 6.84 (m, 1H); 6.56 (m, 1H); 3.39 (s, 2H). A 1 L three-neck round bottom flask equipped with a condenser, magnetic stir bar, nitrogen inlet heated to reflux while dehydration progress After 7 hours at reflux the dark colored reaction mixture was cooled quenched by pouring over ice-water (700 mL) containing HCl (12M, 200 mL) extracted several times with diethyl ether (3×250 mL) The combined diethyl ether extracts were washed repeatedly with water, 5% sodium bicarbonate (aqueous), and water then dried over anhydrous magnesium sulfate Evaporation of diethyl ether followed by vacuum distillation (80° C./0.5 mm Hg)