phenyl ethenesulfonate

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:

Conditions: temp:22.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 7H-Indolo[2,1-a][2]benzazepine-10-carboxylic acid, 13-cyclohexyl-3-methoxy-6-(phenoxysulfonyl)-,1,1-dimethylethyl ester. To a solution of tbutyl 3-cyclohexyl-2-(2-formyl-4-methoxyphenyl)-1H-indole-6-carboxylate (4.40 g, 11.2 mmol) in dioxane (30.0 mL) and BEMP (4.88 mL, 16.9 mmol) was added phenyl vinylsulfonate (4.14 g, 22.5 mmol). The resulting mixture was stirred at 22° C. for 1 hr and then at 110° C. in a sealed tube in a microwave for 15 min. The resulting mixture was concentrated under reduced pressure. Silica gel chromatography (1:1 EtOAc:hexanes) of the concentrate afforded the title compound (3.49 g, 52%) as a yellow oil. MS m/z 600 (MH+), ret time 3.11 min, column B, 4 minute gradient, flow rate 4 mL/min. at 110° C. in a sealed tube in a microwave for 15 min The resulting mixture was concentrated under reduced pressure

Conditions: temp:22.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 7H-Indolo[2,1-a][2]benzazepine-10-carboxylic acid, 13-cyclohexyl-3-methoxy-6-(phenoxysulfonyl)-,1,1-dimethylethyl ester. To a solution of tbutyl 3-cyclohexyl-2-(2-formyl-4-methoxyphenyl)-1H-indole-6-carboxylate (4.40 g, 11.2 mmol) in dioxane (30.0 mL) and BEMP (4.88 mL, 16.9 mmol) was added phenyl vinylsulfonate (4.14 g, 22.5 mmol). The resulting mixture was stirred at 22° C. for 1 hr and then at 110° C. in a sealed tube in a microwave for 15 min. The resulting mixture was concentrated under reduced pressure. Silica gel chromatography (1:1 EtOAc:hexanes) of the concentrate afforded the title compound (3.49 g, 52%) as a yellow oil. MS m/z 600 (MH+), ret time 3.11 min, column B, 4 minute gradient, flow rate 4 mL/min. at 110° C. in a sealed tube in a microwave for 15 min The resulting mixture was concentrated under reduced pressure

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 9.43 g of phenyl ethenesulfonate and 4.60 ml of 2-nitro-propane was heated to 80° C. and, at 80° C., 0.89 ml of ethyidiisopropylamine was added dropwise. The mixture was stirred at 80° C. for 4 hours and 30 minutes, left to stand at RT for 16 hours and then stirred at 80° C. for a further 2 hours. Cooling to RT was followed by addition of 250 ml of a 2N aqueous HCl solution and extraction 3 times with 150 ml of EA each time. Drying over Na2SO4 and removal of the solvent in vacuo were followed by coevaporation 3 times with 100 ml of toluene each time. 13.47 g of a pale yellow oil were obtained. left to stand at RT for 16 hours stirred at 80° C. for a further 2 hours Cooling to RT Drying over Na2SO4 and removal of the solvent in vacuo

Conditions: temp:22.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 7H-Indolo[2,1-a][2]benzazepine-10-carboxylic acid, 13-cyclohexyl-3-methoxy-6-(phenoxysulfonyl)-,1,1-dimethylethyl ester. To a solution of tbutyl 3-cyclohexyl-2-(2-formyl-4-methoxyphenyl)-1H-indole-6-carboxylate (4.40 g, 11.2 mmol) in dioxane (30.0 mL) and BEMP (4.88 mL, 16.9 mmol) was added phenyl vinylsulfonate (4.14 g, 22.5 mmol). The resulting mixture was stirred at 22° C. for 1 hr and then at 110° C. in a sealed tube in a microwave for 15 min. The resulting mixture was concentrated under reduced pressure. Silica gel chromatography (1:1 EtOAc:hexanes) of the concentrate afforded the title compound (3.49 g, 52%) as a yellow oil. MS m/z 600 (MH+), ret time 3.11 min, column B, 4 minute gradient, flow rate 4 mL/min. at 110° C. in a sealed tube in a microwave for 15 min The resulting mixture was concentrated under reduced pressure

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: The aryl ester of vinylsulfonic acid can be prepared by several available techniques. U.S. Pat. No. 3,121,730 teaches reacting a beta-chloroethanesulfonyl chloride with phenol in an aqueous medium at a pH of between 7.5 and 11.5. The reaction proceeds with a loss of 2 mols of hydrogen chloride to yield phenyl vinylsulfonate. U.S. Pat. No. 3,133,948 teaches reacting carbyl sulfate with an aromatic hydroxy compound in an aqueous alkaline medium at a pH between 7.5 and 11.5 to yield a aryl vinylsulfonate.

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

Procedure: To a solution of 1-(4-Methyl-benzo[b]thiophen-3-ylmethyl)-1,3-dihydro-benzimidazol-2-one (50 mg, 0.17 mmol) in THF (1.0 mL) are added Ethenesulfonic acid phenyl ester (63 mg, 0.34 mmol) and solid NaOH (14 mg, 0.34 mmol). The resulting suspension is stirred at room temperature for 0.5 hr and it turned into clear solution in about 10 min. Then saturated NH4Cl solution (5.0 mL) is added along with water (5 mL). The mixture is extracted with EtOAc (3×20 mL). The organic layers are combined, dried (MgSO4) and concentrated to give crude product. Purification by flash column chromatography using EtOAc in Hexanes (from 0% to 30%) affords 61 mg (75%) of 2-[3-(4-Methyl-benzo[b]thiophen-3-ylmethyl)-2-oxo-2,3-dihydro-benzimidazol-1-yl]-ethanesulfonic acid phenyl ester. LCMS (ESMS): m/z 479.11 (M+H+). it turned into clear solution in about 10 min The mixture is extracted with EtOAc (3×20 mL) dried (MgSO4) concentrated to give crude product Purification by flash column chromatography

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

Procedure: The aryl ester of vinylsulfonic acid can be prepared by several available techniques. One method, described in U.S. Pat. No. 3,121,730 to Distler, involves reacting a beta-chloro-ethanesulfonic acid chloride with phenol in an aqueous medium at a pH of between 7.5 and 11.5. The reaction proceeds with a loss of 2 mols of hydrogen chloride to yield phenyl vinylsulfonate. An alternative method, described in U.S. Pat. No. 3,133,948, also to Distler, involves reacting carbyl sulfate with an aromatic hydroxy compound in an aqueous alkaline medium at a pH between 7.5 and 11.5 to yield a phenyl vinylsulfonate.