N-(4-aminophenyl)sulfonylacetamide

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: 3.26 g (13.1 mmol) of 3-(3,4-dimethylbenzoyl)-2-methylpropionaldehyde ethylene acetal [prepared as described in step (ii) above] and 2.81 g (13.1 mmol) of 4-acetylaminosulfonylaniline were dissolved in a mixture of 52 ml (52 mmol) of 1N aqueous hydrochloric acid and 16 ml of tetrahydrofuran, and the mixture was heated at 70° C. for 1 hour. At the end of this time, the mixture was left to stand to allow it to cool. The mixture was then extracted three times with ethyl acetate. The organic extracts were combined and washed with a saturated aqueous solution of sodium chloride. The resulting solution was then dried over anhydrous magnesium sulfate, after which it was concentrated by evaporation under reduced pressure. The residue thus obtained was applied to a silica gel chromatography column and eluted with a 3:2 by volume mixture of hexane and ethyl acetate and crystallised from diisopropyl ether, to give 1.27 g (yield 25%) of the title compound as a white powder, melting at 192-193° C. At the end of this time, the mixture was left to cool The mixture was then extracted three times with ethyl acetate washed with a saturated aqueous solution of sodium chloride The resulting solution was then dried over anhydrous magnesium sulfate after which it was concentrated by evaporation under reduced pressure The residue thus obtained eluted with a 3:2 by volume mixture of hexane and ethyl acetate crystallised from diisopropyl ether

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

Procedure: 3.26 g (13.1 mmol) of 3-(3,4-dimethylbenzoyl)-2-methylpropionaldehyde ethylene acetal [prepared as described in step (ii) above] and 2.81 g (13.1 mmol) of 4-acetylaminosulfonylaniline were dissolved in a mixture of 52 ml (52 mmol) of 1N aqueous hydrochloric acid and 16 ml of tetrahydrofuran, and the mixture was heated at 70° C. for 1 hour. At the end of this time, the mixture was left to stand to allow it to cool. The mixture was then extracted three times with ethyl acetate. The organic extracts were combined and washed with a saturated aqueous solution of sodium chloride. The resulting solution was then dried over anhydrous magnesium sulfate, after which it was concentrated by evaporation under reduced pressure. The residue thus obtained was applied to a silica gel chromatography column and eluted with a 3:2 by volume mixture of hexane and ethyl acetate and crystallised from diisopropyl ether, to give 1.27 g (yield 25%) of the title compound as a white powder, melting at 192-193° C. At the end of this time, the mixture was left to cool The mixture was then extracted three times with ethyl acetate washed with a saturated aqueous solution of sodium chloride The resulting solution was then dried over anhydrous magnesium sulfate after which it was concentrated by evaporation under reduced pressure The residue thus obtained eluted with a 3:2 by volume mixture of hexane and ethyl acetate crystallised from diisopropyl ether

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

Procedure: The title compound was prepared in 26% yield from 8-ethoxymethylene-6,8-dihydro-1-thia-3,6-diaza-as-indacen-7-one and N-acetyl-4-aminobenzenesulfonamide according to Procedure J: 1H NMR (DMSO-d6): δ12.0 (s, 1H), 11.2 (d, 1H), 10.9 (s, 1H), 8.1 (d, 1H), 7.9 (m, 3H), 7.6 (d, 2H), 7.1 (d, 1H), 2.0 (s, 3H); ESI−MS m/z413 (M−H)−.

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

Procedure: The title compound was prepared in 26% yield from 8-ethoxymethylene-6,8-dihydro-1-thia-3,6-diaza-as-indacen-7-one and N-acetyl-4-aminobenzenesulfonamide according to Procedure J: 1H NMR (DMSO-d6): δ12.0 (s, 1H), 11.2 (d, 1H), 10.9 (s, 1H), 8.1 (d, 1H), 7.9 (m, 3H), 7.6 (d, 2H), 7.1 (d, 1H), 2.0 (s, 3H); ESI−MS m/z413 (M−H)−.

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

Procedure: The title compound was prepared from 2-butyl-4-chloro-5-phenylisothiazol-3(2H)-one 1,1-dioxide and N-[(4-aminophenyl)sulfonyl]acetamide in a similar manner as described for e.g. Examples 6-9, 22-25, 28 and 32-35. 1H NMR (500 MHz, CD3CN): δ 1.00 (t, 3H), 1.43-1.52 (m, 2H), 1.78-1.85 (m, 2H), 1.94 (s, 3H), 3.76 (t, 2H), 6.88-6.92 (m, 2H), 7.16-7.24 (m, 4H), 7.29-7.34 (m, 1H), 7.54-7.57 (m, 2H), 8.03 (bs, 1H), 9.26 (bs, 1H).

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

Procedure: The title compound was prepared from 2-butyl-4-chloro-5-phenylisothiazol-3(2H)-one 1,1-dioxide and N-[(4-aminophenyl)sulfonyl]acetamide in a similar manner as described for e.g. Examples 6-9, 22-25, 28 and 32-35. 1H NMR (500 MHz, CD3CN): δ 1.00 (t, 3H), 1.43-1.52 (m, 2H), 1.78-1.85 (m, 2H), 1.94 (s, 3H), 3.76 (t, 2H), 6.88-6.92 (m, 2H), 7.16-7.24 (m, 4H), 7.29-7.34 (m, 1H), 7.54-7.57 (m, 2H), 8.03 (bs, 1H), 9.26 (bs, 1H).

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

Procedure: The compound was prepared according to the general method of Preparation 9 using 2,2'-dithiobisbenzoyl chloride (3.0 g, 8.0 mmol) in 30 mL of dichloromethane and 4-[(acetylamino)sulfonyl]aniline (5.6 g, 26.0 mmol) in 100 mL of pyridine. The crude product was purified on a silica gel column using chloroform/methanol (1:1 v/v) as the mobile phase. The pure fractions were pooled, concentrated in vacuo, and the solid was crystallized from ethanol/water (1:1 v/v) to yield 0.5 g of the title compound, mp 180-182° C. The compound was prepared The crude product was purified on a silica gel column concentrated in vacuo the solid was crystallized from ethanol/water (1:1 v/v)

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

Procedure: The compound was prepared according to the general method of Preparation 9 using 2,2'-dithiobisbenzoyl chloride (3.0 g, 8.0 mmol) in 30 mL of dichloromethane and 4-[(acetylamino)sulfonyl]aniline (5.6 g, 26.0 mmol) in 100 mL of pyridine. The crude product was purified on a silica gel column using chloroform/methanol (1:1 v/v) as the mobile phase. The pure fractions were pooled, concentrated in vacuo, and the solid was crystallized from ethanol/water (1:1 v/v) to yield 0.5 g of the title compound, mp 180-182° C. The compound was prepared The crude product was purified on a silica gel column concentrated in vacuo the solid was crystallized from ethanol/water (1:1 v/v)

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

Procedure: The compound was prepared according to the general method of Preparation 9 using 2,2'-dithiobisbenzoyl chloride (3.0 g, 8.0 mmol) in 30 mL of dichloromethane and 4-[(acetylamino)sulfonyl]aniline (5.6 g, 26.0 mmol) in 100 mL of pyridine. The crude product was purified on a silica gel column using chloroform/methanol (1:1 v/v) as the mobile phase. The pure fractions were pooled, concentrated in vacuo, and the solid was crystallized from ethanol/water (1:1 v/v) to yield 0.5 g of the title compound, mp 180°-182° C. The compound was prepared The crude product was purified on a silica gel column concentrated in vacuo the solid was crystallized from ethanol/water (1:1 v/v)

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

Procedure: The compound was prepared according to the general method of Preparation 9 using 2,2'-dithiobisbenzoyl chloride (3.0 g, 8.0 mmol) in 30 mL of dichloromethane and 4-[(acetylamino) sulfonyl]aniline (5.6 g, 26.0 mmol) in 100 mL of pyridine. The crude product was purified on a silica gel column using chloroform/methanol (1:1 v/v) as the mobile phase. The pure fractions were pooled, concentrated in vacuo, and the solid was crystallized from ethanol/water (1:1 v/v) to yield 0.5 g of the title compound, mp 180°-182° C. The compound was prepared The crude product was purified on a silica gel column concentrated in vacuo the solid was crystallized from ethanol/water (1:1 v/v)