3-methylsulfonylaniline

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: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: 3-Methylsulfonylaniline (1.4 mmol, 0.3 g), 3-oxo-2-(2-oxo-2-phenyl-ethyl)-butyric acid ethyl ester (1.4 mmol, 0.35 g), triethylamine (1.4 mmol, 0.14 g), and tosic acid (0.1 g) were combined in ethanol, then heated under reflux. The resulting oil was resuspended in chloroform, then washed with water, 5% sodium bicarbonate, and brine. The organic layer was dried over NaSO4, then the solids were separated and the solvents removed under vacuum. The crude material was purified over silica gel to yield the named product as an oil. The structure of the compound was verified by 1H-NMR (CDCl3, ppm): 1.36 t (3H), 2.45 s (3H), 2.82 s (3H), 4.3 q (2H), and 6.8-7.2 m (9H). heated under reflux washed with water, 5% sodium bicarbonate, and brine The organic layer was dried over NaSO4 the solids were separated the solvents removed under vacuum The crude material was purified over silica gel

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

Procedure: (3-Nitro)phenyl methyl sulphone (prepared as described in Step 1 above) (5.396 g) reduced iron (7.5 g) and ammonium chloride (7.18 g) were mixed together in ethanol/water (2:1) (150 ml) and heated under reflux for 2 hours. The black solution was filtered through `Celite` and the pad washed with ethyl acetate. The solvents were removed under reduced pressure and the residue taken up in ethyl acetate/water. The organic layer was separated and the aqueous layer extracted with 3 further portions of ethyl acetate. The combined organic layers were washed with brine and the solvent removed under reduced pressure to give a dark orange oil (3.9275 g). This was chromatographed on silica gel using ethyl acetate-hexane (45:55 to 50:50) as eluant to give the title compound as an orange oil, yield 3.607 g. heated under reflux for 2 hours The black solution was filtered through `Celite` and the pad washed with ethyl acetate The solvents were removed under reduced pressure The organic layer was separated the aqueous layer extracted with 3 further portions of ethyl acetate The combined organic layers were washed with brine the solvent removed under reduced pressure

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: To a solution of 3-methanesulphonyl-phenylamine (2.5 g) in 6 mL HCl was added a solution of NaNO2 in 5 mL of H2O at −5° to 0° C. After stirring for 30 min the resulted diazonium salt was poured into a cold solution (−10° to −15° C.) of stannous chloride in 6 ml HCl. The mixture of resulted hydrazine hydrochloride in HCl was stored in the refrigerator overnight. The solution was basified to pH 10, by addition of a 6N solution of NaOH, and extracted with THF. The organic layer was washed, dried over MgSO4, and evaporated to yield 2 g of a light brown solid (3-methanesulfonyl-phenyl)-hydrazine. was stored in the refrigerator overnight extracted with THF The organic layer was washed dried over MgSO4 evaporated