5H-benzo[b][1,4]benzothiazepin-6-one

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

Procedure: As described for in Reference Example 12, a mixture of 3.3 g of 10,11-dihydro-11-oxodibenz[b,f][1,4]thiazepine, 25 ml of tetrahydrofuran, 4.0 ml of 10 molar borane-dimethylsulfide (2.67 equivalents) in tetrahydrofuran is stirred at room temperature 18 hours to give, after work-up, 10,11-dihydrodibenz[b,f][1,4]thiazepine as white crystals, m.p. 145°-148° C. The preceding compound (3.5 g) is suspended in 25 ml of dichloromethane and a solution of 1.8 g of 4-[(2-methylbenzoyl)amino]benzoyl chloride in 50 ml of dichloromethane added. To the stirred mixture is added 4 ml of triethylamine and 0.2 g of 4-(dimethylamino) pyridine. The mixture is stirred at room temperature for 20 hours. The mixture is filtered and the filtrate concentrated. The residue is purified by chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solvent to give 2.2 g of yellow crystals. A sample (0.80 g) is further purified by thick layer chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solvent to give 0.50 g of crystals, 76°-78° C. to give The mixture is stirred at room temperature for 20 hours The mixture is filtered the filtrate concentrated The residue is purified by chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solvent

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

Procedure: To a mixture of 3.3 g of 10,11-dihydro-11-oxodibenz[b,f][1,4]thiazepine in 25 ml of tetrahydrofuran is added 4.0 ml of 10 molar borane-dimethylsulfide in tetrahydrofuran. The mixture is stirred at room temperature for 18 hours, 50 ml of anhydrous methanol added and the solvent removed. An additional 30 ml of methanol is added and the solvent removed to give white crystals. A sample is purified by chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solvent to give white crystals, m.p. 145°-148° C. the solvent removed An additional 30 ml of methanol is added the solvent removed to give white crystals A sample is purified by chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solvent to give white crystals, m.p. 145°-148° C.

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

Procedure: As described for in Reference Example 12, a mixture of 3.3 g of 10,11-dihydro-11-oxodibenz[b,f] [1,4]thiazepine, 25 ml of tetrahydrofuran, 4.0 ml of 10 molar borane-dimethylsulfide (2.67 equiyalents) in tetrahydrofuran is stirred at room temperature 18 hours to give, after work-up, 10,11-dihydrodibenz[b,f][1,4] thiazepine as white crystals, m.p. 145°-148° C. The preceding compound (3.5 g) is suspended in 25 ml of dichloromethane and a solution of 1.8 g of 4-[(2-methylbenzoyl) amino]benzoyl chloride in 50 ml of di-chloromethane added. To the stirred mixture is added 4 ml of triethylamine and 0.2 g of 4-(dimethylamino) pyridine. The mixture is stirred at room temperature for 20 hours. The mixture is filtered and the filtrate concentrated. The residue is purified by chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solyent to give 2.2 g of yel]ow crystals. A sample (0.80 g) is further purified by thick layer chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solvent to give 0.50 g of crystals, 76°-78° C. to give The mixture is stirred at room temperature for 20 hours The mixture is filtered the filtrate concentrated The residue is purified by chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solyent to give 2.2 g of yel]ow crystals A sample (0.80 g) is further purified by thick layer chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solvent

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

Procedure: To a mixture of 3.3 g of 10,11-dihydro-11-oxodibenz[b,f][1,4]thiazepine in 25 ml of tetrahydrofuran is added 4.0 ml of 10 molar borane-dimethylsulfide in tetrahydrofuran. The mixture is stirred at room temperature for 18 hours, 50 ml of anhydrous methanol added and the solvent removed. An additional 30 ml of methanol is added and the solvent removed to give white crystals. A sample is purified by chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solvent to give white crystals, m.p. 145°-148° C. the solvent removed An additional 30 ml of methanol is added the solvent removed to give white crystals A sample is purified by chromatography on silica gel with hexane-chloroform-ethyl acetate (2:1:1) as solvent to give white crystals, m.p. 145°-148° C.

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: Phosphorus pentasulphide (1.2 eq) was added to a solution of 10,11-dihydrodibenzo[b,f][1,4]thiazepin-11-one (1.14 g, 5 mmol) in pyridine (40 ml) and heated under reflux for 15 hr. The mixture was allowed to cool and poured into hydrochloric acid (1.3M) at 0° C. Filtration of the yellow precipitate and purification by chromatography on silica (eluting with dichloromethane/methanol, 99:1) followed by recrystallisation from ethanol gave the title compound as yellow crystals (700 mg, m.p. 245°-246° C., Rf 0.81, CH2Cl2/MeOH9:1). heated under reflux for 15 hr to cool Filtration of the yellow precipitate and purification by chromatography on silica (eluting with dichloromethane/methanol, 99:1) followed by recrystallisation from ethanol

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

Procedure: 2-(2-Aminophenylthio)benzonitrile (3.72 g, 16 mmol) was dissolved in water (35 ml), acetic acid (35 ml) and concentrated sulphuric acid (35 ml) and stirred and heated under reflux for 3 hr. The mixture was allowed to cool and poured onto crushed ice (600 ml) and adjusted to pH 6 with sodium hydroxide solution (10N). The product was extracted into dichloromethane (700 ml), dried (MgSO4) and evaporated in vacuo. The residue was dissolved in xylene (250 ml) and refluxed in a Dean-Stark apparatus for 72 hr. Filtration of the cold reaction mixture and recrystallisation from ethanol gave the title compound as a white crystals (2.99 g, m.p. 255°-256° C., Rf 0.68, CH2Cl2 /MeOH 19:1). heated under reflux for 3 hr to cool poured The product was extracted into dichloromethane (700 ml) dried (MgSO4) evaporated in vacuo The residue was dissolved in xylene (250 ml) refluxed in a Dean-Stark apparatus for 72 hr Filtration of the cold reaction mixture and recrystallisation from ethanol

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

Procedure: A solution of MCPBA (1 eq) in chloroform (5 ml) was added to a stirred solution of 10,11-dihydrodibenzo[b,f][1,4] thiazepin-11-one (114 mg, 0.5 mmol) in chloroform (30 ml). After 0.5 hr the reaction mixture was poured into sodium bicarbonate solution (5%, 30 ml), separated and the aqueous layer washed with chloroform (30 ml). The combined organic fractions were dried (MgSO4) and evaporated. Recrystallisation from toluene gave the title compound as off-white crystals (76 mg, m.p. 308°-310° C., Rf 0.16, CH2Cl2 /MeOH 50:1). separated the aqueous layer washed with chloroform (30 ml) The combined organic fractions were dried (MgSO4) evaporated Recrystallisation from toluene