2-iodobenzenesulfonyl chloride

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:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2-Iodobenzenesulphonyl chloride (obtained as described in J Org Chem, 1977, 42, 3265) (12.1 g) was added to a solution of 2-amino-3-methoxy-5-methylpyrazine (5.6 g) in pyridine (100 ml) and the solution was heated at 70° C. for 8 hours. Volatile material was removed by evaporation and water (200 ml) was added to the residue. The mixture was extracted with ethyl acetate (2×200 ml) and the extracts were washed with 2M hydrochloric acid (200 ml) and water (200 ml). The extracts were dried (MgSO4) and the solvent was removed by evaporation. The residue was triturated with ether to give N-(3-methoxy-5-methyl-2-pyrazinyl)-2-iodobenzenesulphonamide (7.2 g), m.p. 136°-138° C.; 1H NMR (d6 -DMSO): 2.3 (s,3H), 3.9 (s,3H), 7.3 (dt,1H), 7.5-7.65 (m,2H), 8.05-8.15 (m,2H), 10.7-10.8 (br s, 1H). Volatile material was removed by evaporation and water (200 ml) was added to the residue The mixture was extracted with ethyl acetate (2×200 ml) the extracts were washed with 2M hydrochloric acid (200 ml) and water (200 ml) The extracts were dried (MgSO4) the solvent was removed by evaporation The residue was triturated with ether

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

Procedure: A solution of 2-iodobenzenesulphonyl chloride (obtained as described in J. Org. Chem. 1977, 42, 3265) (8.28 g) and 4-nitrophenol (3.81 g) in pyridine (50 ml) was heated at 100° C. for 3 hours. Volatile material was removed by evaporation and water (200 ml) was added to the residue. The mixture was extracted with ethyl acetate (2×200 ml) and the combined extracts were washed with 1M hydrochloric acid (2×200 ml) and dried (MgSO4). Solvent was removed by evaporation and the residue was recrystallised from a mixture of ethyl acetate and hexane to give 4-nitrophenyl 2-iodobenzenesulphonate (7.83 g), m.p. 131°-133° C.; mass spectrum (+ve CI): 405 (M+). Volatile material was removed by evaporation and water (200 ml) was added to the residue The mixture was extracted with ethyl acetate (2×200 ml) the combined extracts were washed with 1M hydrochloric acid (2×200 ml) dried (MgSO4) Solvent was removed by evaporation the residue was recrystallised from a mixture of ethyl acetate and hexane

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:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 19.6 g (80 mmol) of 1-bromocarbazole are initially introduced in 1000 ml of THF, and 8.9 g (223.3 mmol) of NaH (60% in oil) are added at 0° C. 24 g (80 mmol) of 2-iodobenzenesulfonyl chloride are subsequently added to the mixture, which is then stirred at 40° C. for 12 h. The organic phase is dried over MgSO4, and the solvent is removed in vacuo. The residue is recrystallised from acetone and finally sublimed in a high vacuum. Yield: 29 g (574 mmol), 72% of theory, purity according to HPLC 99.9%. The organic phase is dried over MgSO4 the solvent is removed in vacuo The residue is recrystallised from acetone

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 19.6 g (80 mmol) of 1-bromocarbazole are initially introduced in 1000 ml of THF, and 8.9 g (223.3 mmol) of NaH (60% in oil) are added at 0° C. 24 g (80 mmol) of 2-iodobenzenesulfonyl chloride are subsequently added to the mixture, which is then stirred at 40° C. for 12 h. The organic phase is dried over MgSO4, and the solvent is removed in vacuo. The residue is recrystallised from acetone and finally sublimed in a high vacuum. Yield: 29 g (574 mmol), 72% of theory, purity according to HPLC 99.9%. The organic phase is dried over MgSO4 the solvent is removed in vacuo The residue is recrystallised from acetone

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 43 g (169 mmol) of 11,12-dihydroindolo[2,3-a]carbazole are initially introduced in 1000 ml of THF, and 8.9 g (223.3 mmol) of NaH (60% in oil) are added at 0° C. 24 g (80 mmol) of 2-iodobenzenesulfonyl chloride are subsequently added to the mixture, which is then stirred at 40° C. for 12 h. The organic phase is dried over MgSO4, and the solvent is removed in vacuo. The residue is recrystallised from acetone and finally sublimed in a high vacuum. Yield: 29 g (574 mmol), 72% of theory, purity according to HPLC 99.9%. The organic phase is dried over MgSO4 the solvent is removed in vacuo The residue is recrystallised from acetone

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2-Iodobenzenesulphonyl chloride (obtained as described in J Org Chem, 1977, 42, 3265) (12.1 g) was added to a solution of 2-amino-3-methoxy-5-methylpyrazine (5.6 g) in pyridine (100 ml) and the solution was heated at 70° C. for 8 hours. Volatile material was removed by evaporation and water (200 ml) was added to the residue. The mixture was extracted with ethyl acetate (2×200 ml) and the extracts were washed with 2M hydrochloric acid (200 ml) and water (200 ml). The extracts were dried (MgSO4) and the solvent was removed by evaporation. The residue was triturated with ether to give N-(3-methoxy-5-methyl-2-pyrazinyl)-2-iodobenzenesulphonamide (7.2 g), m.p. 136°-138° C.; 1H NMR (d6 -DMSO): 2.3 (s,3H), 3.9 (s,3H), 7.3 (dt,1H), 7.5-7.65 (m,2H), 8.05-8.15 (m,2H), 10.7-10.8 (br s, 1H). Volatile material was removed by evaporation and water (200 ml) was added to the residue The mixture was extracted with ethyl acetate (2×200 ml) the extracts were washed with 2M hydrochloric acid (200 ml) and water (200 ml) The extracts were dried (MgSO4) the solvent was removed by evaporation The residue was triturated with ether