1-tert-butyl-1H-indene

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 500 mL flask equipped with magnetic stirring bar were introduced 12.35 g (0.072 moles) of 1-t-butyl-indene, 1.43 g (0.048 moles) of para-formaldehyde and 2.73 g (0.014 moles) of para-toluenesulphonic acid in 200 ml of toluene; the mixture was heated to 80° C. and was maintained under stirring for 6 hours at 80° C. Then the reaction was quenched with water/NaHCO3; the conversion, measured by gas chromatographic analysis, was 79.5%. The organic layer was separated, washed with water and brought to dryness under reduced pressure. The crude product crystallized upon standing at room temperature, and then was further purified by washing with MeOH, thus isolating 10.8 g bis(3-t-butyl-2-indenyl)methane (purity of 90.9 by G.C.; yield=76.81%). In a 500 mL flask equipped with magnetic stirring bar was maintained Then the reaction was quenched with water/NaHCO3 The organic layer was separated washed with water The crude product crystallized upon standing at room temperature was further purified by washing with MeOH

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 500 mL flask equipped with magnetic stirring bar were introduced 12.35 g (0.072 moles) of 1-t-butyl-indene, 1.43 g (0.048 moles) of para-formaldehyde and 2.73 g (0.014 moles) of para-toluenesulphonic acid in 200 ml of toluene; the mixture was heated to 80° C. and was maintained under stirring for 6 hours at 80° C. Then the reaction was quenched with water/NaHCO3; the conversion, measured by gas chromatographic analysis, was 79.15%. The organic layer was separated, washed with water and brought to dryness under reduced pressure. The crude product crystallized upon standing at room temperature, and then was further purified by washing with MeOH, thus isolating 10.8 g bis(3-t-butyl-2-indenyl)methane (purity of 90.9 by G.C.; yield=76.81%). In a 500 mL flask equipped with magnetic stirring bar was maintained Then the reaction was quenched with water/NaHCO3 The organic layer was separated washed with water The crude product crystallized upon standing at room temperature was further purified by washing with MeOH

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 42.0 g of indene (technical grade, 94 % by GC, 39.5 g, 340 mmol), 50 % w aqueous KOH (308 g in 308 nL) and 15.8 g of Adogen (Aldrich, 34 mnuol) dissolved in 139.7 g of tert-butylbromide (1019.6 mmol) were introduced in this order, at room temperature, in a 1 L, jacketed glass reactor with mechanical stirrer (Buïchi). The organic phase turns green. The mixture is heated to 60° C. and vigorously stirred for two hours (a pressure build-up to 2.5 bar-g is observed) and then cooled to room temperature. Total reaction time is 3 h. The organic phase is extracted with technical hexane (3×200mL) and analyzed by GC. Conversion: 74.5% w of 3-tert-butyl-indene and 1.8% of 1-tert-butyl-indene, unreacted indene 13.7% w. The solution was evaporated under reduced pressure (rotovac) and the resulting dark brown viscous liquid was distilled at 1 mmHg, collecting the fraction boiling between 70 and 80° C. (40 g, 76.8% of 3-tert-butyl-indene and 19.5% of 1-tert-butyl-indene, no indene). were introduced in this order, at room temperature, in a 1 L then cooled to room temperature Total reaction time is 3 h The organic phase is extracted with technical hexane (3×200mL) The solution was evaporated under reduced pressure (rotovac) the resulting dark brown viscous liquid was distilled at 1 mmHg collecting the fraction boiling between 70 and 80° C.

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 500 mL flask equipped with magnetic stirring bar were introduced 12.35 g (0.072 moles) of 1-t-butyl-indene, 1.43 g (0.048 moles) of para-formaldehyde and 2.73 g (0.014 moles) of para-toluenesulphonic acid in 200 ml of toluene; the mixture was heated to 80° C. and was maintained under stirring for 6 hours at 80° C. Then the reaction was quenched with water/NaHCO3; the conversion, measured by gas chromatographic analysis, was 79.5%. The organic layer was separated, washed with water and brought to dryness under reduced pressure. The crude product crystallized upon standing at room temperature, and then was further purified by washing with MeOH, thus isolating 10.8 g bis(3-t-butyl-2-indenyl)methane (purity of 90.9 by G.C.; yield=76.81%). In a 500 mL flask equipped with magnetic stirring bar was maintained Then the reaction was quenched with water/NaHCO3 The organic layer was separated washed with water The crude product crystallized upon standing at room temperature was further purified by washing with MeOH