1,4-DIBROMO-2,3-BIS(BROMOMETHYL)-2-BUTENE

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

Procedure: 19 g of tetrakis (bromomethyl)ethylene and 9 g of p-toluene sulfonamide were disolved in 220 ml of dimethylformamide. 30 g of anhydrous potassium carbonate was added and then stirred at room temperature for 20 hours. Thereafter solvent was removed by vacuum distillation. 50 ml of ethylacetate was added to obtain solid product, and solid product was purified by silica gel column chromatography. 12 g of the title compound was obtained (yield 60%). Thereafter solvent was removed by vacuum distillation 50 ml of ethylacetate was added to obtain solid product, and solid product was purified by silica gel column chromatography

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

Procedure: 30 g of tetrakis (bromomethyl)ethylene and 30 g of p-toluene sulfonamide were dissolved in 400 ml of dimethylformamide. 150 g of potassium carbonate anhydride (or 50% sodium hydride 17 g) was added and then stirred at room temperature for 24 hours. Thereafter, this reaction mixture was distilled under vacuum to remove solvents. By adding 30 ml of water and 100 ml of ethylacetate, 17 g of the title compound was obtained as pale yellow powder (yield 50%). Thereafter, this reaction mixture was distilled under vacuum to remove solvents By adding 30 ml of water and 100 ml of ethylacetate

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

Procedure: 19 g of tetrakis (bromomethyl)ethylene and 9 g of p-toluene sulfonamide were dissolved in 220 ml of dimethylformamide. 30 g of anhydrous potassium carbonate was added and then stirred at room temperature for 20 hours. Thereafter solvent was removed by vacuum distillation. 50 ml of ethylacetate was added to obtain solid product, and solid product was purified by silica gel column chromatography. 12 g of the title compound was obtained (yield 60%). Thereafter solvent was removed by vacuum distillation 50 ml of ethylacetate was added to obtain solid product, and solid product was purified by silica gel column chromatography

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

Procedure: 30 g of tetrakis (bromomethyl)ethylene and 30 g of p-toluene sulfonamide were dissolved in 400 ml of dimethylformamide. 150 g of potassium carbonate anhydride (or 50% sodium hydride 17 g) was added and then stirred at room temperature for 24 hours. Thereafter, this reaction mixture was distilled under vacuum to remove solvents. By adding 30 ml of water and 100 ml of ethylacetate, 17 g of the title compound was obtained as pale yellow powder (yield 50%). Thereafter, this reaction mixture was distilled under vacuum to remove solvents By adding 30 ml of water and 100 ml of ethylacetate