1-(3-bromopropyl)-2,2,5,5-tetramethyl-1,2,5-azadisilolidine

Conditions: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: About 3.36 g of potassium phthalimide, 4.89 g of 1-(3-bromopropyl)-2,2,5,5-tetramethyl-1-aza-2,5-disilacyclopentane, and 12 mL of N,N-dimethylformamide were mixed in a flask. The mixture was stirred for 5 hour while the flask was kept in an oil bath maintained at 75° C. The N,N-dimethylformamide was removed under vacuum. The residue was extracted with 90 mL of toluene and filtered. The filtrate was evaporated under vacuum. The residue was triturated with 80 mL of hexane, cooled with dry ice, and then filtered to give N-[3-(2,2,5,5-tetramethyl-1-aza-2,5-disila-1-cyclopentyl)-1-propyl]phthalimide (TMADSCPPI) as a white solid (4.3 g, 68% yield). 1H NMR data (C6D6, 25° C., referenced to tetramethylsilane) of the product: δ 7.41 (multiplet, 2H, aromatic protons), 6.81 (multiplet, 2H, aromatic protons), 3.55 (multiplet, 2H, CH2 protons), 2.79 (multiplet, 2H, CH2 protons), 1.77 (multiplet, 2 H, CH2 protons), 0.70 (singlet, 4H, CH2—Si protons), 0.06 (singlet, 12H, Si—CH3 protons). was kept in an oil bath The N,N-dimethylformamide was removed under vacuum The residue was extracted with 90 mL of toluene filtered The filtrate was evaporated under vacuum The residue was triturated with 80 mL of hexane cooled with dry ice filtered

Conditions: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: About 3.36 g of potassium phthalimide, 4.89 g of 1-(3-bromopropyl)-2,2,5,5-tetramethyl-1-aza-2,5-disilacyclopentane, and 12 mL of N,N-dimethylformamide were mixed in a flask. The mixture was stirred for 5 hour while the flask was kept in an oil bath maintained at 75° C. The N,N-dimethylformamide was removed under vacuum. The residue was extracted with 90 mL of toluene and filtered. The filtrate was evaporated under vacuum. The residue was triturated with 80 mL of hexane, cooled with dry ice, and then filtered to give N-[3-(2,2,5,5-tetramethyl-1-aza-2,5-disila-1-cyclopentyl)-1-propyl]phthalimide (TMADSCPPI) as a white solid (4.3 g, 68% yield). 1H NMR data (C6D6, 25° C., referenced to tetramethylsilane) of the product: δ 7.41 (multiplet, 2H, aromatic protons), 6.81 (multiplet, 2H, aromatic protons), 3.55 (multiplet, 2H, CH2 protons), 2.79 (multiplet, 2H, CH2 protons), 1.77 (multiplet, 2 H, CH2 protons), 0.70 (singlet, 4H, CH2—Si protons), 0.06 (singlet, 12H, Si—CH3 protons). was kept in an oil bath The N,N-dimethylformamide was removed under vacuum The residue was extracted with 90 mL of toluene filtered The filtrate was evaporated under vacuum The residue was triturated with 80 mL of hexane cooled with dry ice filtered

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

Procedure: 1 g (5 mmol) of 2-(2,5-dimethyl-1H-pyrrol-1-yl)-4,6-dimethylpyridine (prepared from the 6-amino-2,4-lutidine according to J. Chem. Soc., Perkin Trans., 1984, 12, 2801) is dissolved, under an argon atmosphere, in 10 ml of anhydrous ethyl ether and 1.132 ml (7.5 mmol) of N,N,N,N-tetramethylethylenediamine (TMEDA). The reaction mixture is cooled down to −20° C. and 2.4 ml (6 mmol) of a 2.5 M solution of BuLi in hexane is added dropwise. After 5 hours at −20° C., the reaction mixture is cooled down to −45° C. and 1.68 g (6 mmol) of 1-(3-bromopropyl)-2,2,5,5-tetramethyl-1-aza-2,5-disilacyclopentane is added and the temperature is allowed to return to ambient temperature overnight. 50 ml of a saturated solution of ammonium chloride is added and the mixture is agitated for 2 hours at 25° C. The organic phase is decanted and washed successively with 40 ml of water and 40 ml of salt water, dried over magnesium sulphate, filtered and concentrated under vacuum. The residue obtained is purified on a silica column (eluent=dichloromethane with 5% ethanol) in order to produce a yellow oil with a yield of 62%. the reaction mixture is cooled down to −45° C. to return to ambient temperature overnight The organic phase is decanted washed successively with 40 ml of water and 40 ml of salt water dried over magnesium sulphate filtered concentrated under vacuum The residue obtained is purified on a silica column (eluent=dichloromethane with 5% ethanol) in order to produce a yellow oil with a yield of 62%

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

Procedure: To a solution of diethyl 1H-pyrrolo[2,3-b]pyridine-2,6-dicarboxylate (Intermediate D, 2.00 g, 7.23 mmol) in NMP (20 mL) is added potassium carbonate (3.16 g, 22.9 mmol) and 1-(3-bromopropyl)-2,2,5,5-tetramethyl-1-aza-2,5-disilacyclopentane (2.28 mL, 9.15 mmol). The mixture is stirred at room temperature for 16 h. 1M TBAF in THF (9.15 mL, 9.15 mmol) is added and the mixture is stirred at room temperature for 3 h. The reaction is poured over ice and the resulting solid is collected by filtration. The crude material is purified via trituration with CH2Cl2/diethyl ether to afford the title compound as a yellow solid (1.84 g, 88%). LCMS: 274.70 (M+H+). the mixture is stirred at room temperature for 3 h The reaction is poured over ice the resulting solid is collected by filtration The crude material is purified via trituration with CH2Cl2/diethyl ether

Conditions: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: About 3.36 g of potassium phthalimide, 4.89 g of 1-(3-bromopropyl)-2,2,5,5-tetramethyl-1-aza-2,5-disilacyclopentane, and 12 mL of N,N-dimethylformamide were mixed in a flask. The mixture was stirred for 5 hour while the flask was kept in an oil bath maintained at 75° C. The N,N-dimethylformamide was removed under vacuum. The residue was extracted with 90 mL of toluene and filtered. The filtrate was evaporated under vacuum. The residue was triturated with 80 mL of hexane, cooled with dry ice, and then filtered to give N-[3-(2,2,5,5-tetramethyl-1-aza-2,5-disila-1-cyclopentyl)-1-propyl]phthalimide (TMADSCPPI) as a white solid (4.3 g, 68% yield). 1H NMR data (C6D6, 25° C., referenced to tetramethylsilane) of the product: δ 7.41 (multiplet, 2H, aromatic protons), 6.81 (multiplet, 2H, aromatic protons), 3.55 (multiplet, 2H, CH2 protons), 2.79 (multiplet, 2H, CH2 protons), 1.77 (multiplet, 2 H, CH2 protons), 0.70 (singlet, 4H, CH2—Si protons), 0.06 (singlet, 12H, Si—CH3 protons). was kept in an oil bath The N,N-dimethylformamide was removed under vacuum The residue was extracted with 90 mL of toluene filtered The filtrate was evaporated under vacuum The residue was triturated with 80 mL of hexane cooled with dry ice filtered