3-phenyl-1,3-dihydroindol-2-one

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

Procedure: 3-Phenyloxindole (1.15 g), 4-methylbenzenesulfonyl chloride (1.06 g) and sodium carbonate (0.41 g) are introduced as initial charge in 5.5 ml of water and 11 ml of acetone and heated to 80° C. with stirring in a preheated oil bath. After 20 minutes, 5 ml of acetone and 1 ml of water are then added and the mixture is heated for a further 30 minutes. The hot solution is filtered, and the solid is washed with 20 ml of water/acetone (1:1) and methanol and dried in vacuo. This gives 0.59 g of product in an HPLC purity of 98% (29% of theory). A structural elucidation by NMR verifies that it is the O-sulfonylated product. A further 0.67 g of product in an HPLC purity of 40% can be isolated from the filtrate (13% of theory). the mixture is heated for a further 30 minutes The hot solution is filtered the solid is washed with 20 ml of water/acetone (1:1) and methanol dried in vacuo

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

Procedure: 3-Phenyloxindole (1.15 g), 4-methylbenzenesulfonyl chloride (1.06 g) and sodium carbonate (0.41 g) are introduced as initial charge in 5.5 ml of water and 11 ml of acetone and heated to 80° C. with stirring in a preheated oil bath. After 20 minutes, 5 ml of acetone and 1 ml of water are then added and the mixture is heated for a further 30 minutes. The hot solution is filtered, and the solid is washed with 20 ml of water/acetone (1:1) and methanol and dried in vacuo. This gives 0.59 g of product in an HPLC purity of 98% (29% of theory). A structural elucidation by NMR verifies that it is the O-sulfonylated product. A further 0.67 g of product in an HPLC purity of 40% can be isolated from the filtrate (13% of theory). the mixture is heated for a further 30 minutes The hot solution is filtered the solid is washed with 20 ml of water/acetone (1:1) and methanol dried in vacuo

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

Procedure: 3-Phenyloxindole (1.15 g), 4-methylbenzenesulfonyl chloride (1.06 g) and sodium carbonate (0.41 g) are introduced as initial charge in 5.5 ml of water and 11 ml of acetone and heated to 80° C. with stirring in a preheated oil bath. After 20 minutes, 5 ml of acetone and 1 ml of water are then added and the mixture is heated for a further 30 minutes. The hot solution is filtered, and the solid is washed with 20 ml of water/acetone (1:1) and methanol and dried in vacuo. This gives 0.59 g of product in an HPLC purity of 98% (29% of theory). A structural elucidation by NMR verifies that it is the O-sulfonylated product. A further 0.67 g of product in an HPLC purity of 40% can be isolated from the filtrate (13% of theory). the mixture is heated for a further 30 minutes The hot solution is filtered the solid is washed with 20 ml of water/acetone (1:1) and methanol dried in vacuo