N-(2-chloroethyl)benzamide

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: N-(2-chloroethyl)benzamide (4.3 g, 23.42 mmol), was dissolved in 50 mL anhydrous m-xylene under nitrogen. Phosphorus pentachloride (7.31 g, 35.1 mmol) was then carefully added and the mixture heated to reflux under nitrogen for 2 h. The solution was allowed to cooled to room temperature and 2,4-diisopropyldibenzo[b,d]thiophen-3-amine (7.30 g, 25.8 mmol) was added. The reaction mixture was heated to reflux for 20 h. After cooling, the precipitate was filtered and the solid imidazoline product was collected and washed with toluene followed by hexanes. The resultant crude product was dissolved in methylene chloride and washed twice with 50% NaOH. The organic layer was dried over MgSO4, filtered and concentrated under reduced pressure to afford title product (4.8 g, 50%). the mixture heated to reflux under nitrogen for 2 h The reaction mixture was heated to reflux for 20 h After cooling the precipitate was filtered the solid imidazoline product was collected washed with toluene The resultant crude product was dissolved in methylene chloride washed twice with 50% NaOH The organic layer was dried over MgSO4 filtered concentrated under reduced pressure

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

Procedure: N-(2-chloroethyl)benzamide (3.1 g, 16.88 mmol) was dissolved in 40 mL anhydrous m-xylene under nitrogen. Phosphorus pentachloride (5.27 g, 25.3 mmol) was then carefully added and the mixture heated to reflux under nitrogen for 2 h. The solution was allowed to cooled to room temperature and 2,4-diisobutyldibenzo[b,d]furan-3-amine (5.49 g, 18.57 mmol) was added. The reaction mixture was heated to reflux for 20 h. After cooling, the precipitate was filtered and the solid imidazoline product was collected and washed with toluene followed by hexanes. The resultant crude product was dissolved in methylene chloride and washed twice with 50% NaOH. The organic layer was dried over MgSO4, filtered and concentrated under reduced pressure to afford title product (5.5 g, 77%). the mixture heated to reflux under nitrogen for 2 h The reaction mixture was heated to reflux for 20 h After cooling the precipitate was filtered the solid imidazoline product was collected washed with toluene The resultant crude product was dissolved in methylene chloride washed twice with 50% NaOH The organic layer was dried over MgSO4 filtered concentrated under reduced pressure

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

Procedure: N-(2-chloroethyl)benzamide (6.3 g, 34 mmol) and PCl5 (7.9 g, 38 mmol) were suspended in xylene (75 mL) and refluxed for two hours. Then 1,3-diisopropyldibenzo[b,d]furan-4-amine (10 g, 38 mmol) was added. The mixture was refluxed overnight. After cooling by ice-bath, no precipitation was observed. The mixture was concentrated and the residue was washed with small amount of toluene and hexane. The crude 1-(1,3-diisopropyldibenzo[b,d]furan-4-yl)-2-phenyl-4,5-dihydro-1H-imidazole (7.5 g, 19 mmol, 54.8% yield) was used without further purification for the next step. refluxed for two hours The mixture was refluxed overnight After cooling by ice-bath no precipitation The mixture was concentrated the residue was washed with small amount of toluene and hexane

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

Procedure: N-(2-chloroethyl)benzamide (2.1 g, 11.2 mmol), PCl5 (3.5 g, 16.8 mmol) were dissolved in m-Xylene (100 mL) and refluxed for 2 h. After cooling down the reaction flask to room temperature, 2,4-diisopropyldibenzo[b,d]furan-1-amine (3.3 g, 12.3 mmol) was added to it and the reaction mixture was refluxed overnight. From the cooled reaction mixture white precipitate was filtered out. Precipitate was dissolved in ethylacetate and partitioned between ethylacetate and aqueous Na2CO3. Organic phase was extracted out and dried under vacuum. Target compound (4 g, 90% yield) was used in next step without further purification. refluxed for 2 h the reaction mixture was refluxed overnight From the cooled reaction mixture white precipitate was filtered out Precipitate was dissolved in ethylacetate partitioned between ethylacetate and aqueous Na2CO3 Organic phase was extracted out dried under vacuum

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

Procedure: N-(2-chloroethyl)benzamide (4.09 g, 22.27 mmol) and 90 mL m-xylene were added to a 250 ml, round-bottom flask. Next, phosphorus pentachloride (6.96 g, 33.4 mmol) was added carefully. The reaction mixture was heated to reflux under nitrogen for 2 h. The reaction mixture was cooled down to room temperature and 1,3-diisopropyldibenzo[b,d]furan-2-amine (6.55 g, 24.50 mmol) in 30 mL m-xylene was added. The reaction mixture was refluxed overnight under nitrogen. The reaction mixture was cooled in an ice bath. White solid was collected by filtration. The solid was washed with hexanes, dissolved in ethyl acetate, and washed twice with 10% sodium hydroxide solution. The organic layer was dried over magnesium sulfate, filtered, evaporated to a white solid which was dried under vacuum. 4.78 g (54% yield) of product was obtained. The reaction mixture was heated to reflux under nitrogen for 2 h The reaction mixture was refluxed overnight under nitrogen The reaction mixture was cooled in an ice bath White solid was collected by filtration The solid was washed with hexanes dissolved in ethyl acetate washed twice with 10% sodium hydroxide solution The organic layer was dried over magnesium sulfate filtered evaporated to a white solid which was dried under vacuum

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

Procedure: N-(2-chloroethyl)benzamide (4.12 g, 22.44 mmol) and phosphorous pentachloride (7.01 g, 33.7 mmol) were refluxed in m-xylene under nitrogen for 2 h. The reaction mixture was cooled to room temperature. To the reaction was then added 2,4-diisopropyldibenzo[b,d]furan-3-amine (6 g, 22.44 mmol). The reaction was refluxed for 16 h. After cooled to room temperature, the precipitate was collected by filtration, and washed thoroughly with toluene and hexanes. Sodium hydroxide solution was added to the solid and then ethyl acetate. The organic layer was separated and dried over MgSO4. The solvent was evaporated. 7.4 g (83% yield) of product was obtained. The reaction was refluxed for 16 h After cooled to room temperature the precipitate was collected by filtration washed thoroughly with toluene and hexanes Sodium hydroxide solution was added to the solid The organic layer was separated dried over MgSO4 The solvent was evaporated

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

Procedure: In 20 ml of dioxane were suspended 2.76 g of N-(2-chloroethyl)benzamide, 1.12 g of 1,3-dimethyl-6-(1-piperazinyl)-2,4(1H,3H)-pyrimidinedione, 3.75 g of sodium iodide and 1.4 ml of triethylamine, and the solution was heated under reflux with stirring for 15 hours. Afterward, the solvent was distilled off, and the resultant residue was dissolved in chloroform, washed with water, and then concentrated to dryness. The residue was purified through a silica gel column chromatograph (chloroform/methanol=100/1 to 100/5 in volume ratio), thereby obtaining 1.25 g of the crystals of 1,3-dimethyl-6-[4-(N-benzoyl-2-aminoethyl)piperazin-1-yl]-2,4(1H,3H)-pyrimidinedione. the solution was heated under reflux Afterward, the solvent was distilled off the resultant residue was dissolved in chloroform washed with water concentrated to dryness The residue was purified through a silica gel column chromatograph (chloroform/methanol=100/1 to 100/5 in volume ratio)