1-isothiocyanatoethylbenzene

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

Procedure: 15.1 g (122 mmol) of potassium tert-butoxide are dissolved in 200 ml of tetrahydrofuran in a 500 ml, three-necked, round-bottomed flask under a dry argon atmosphere. The solution is cooled to -70° C. A solution containing 20 g (122 mmol) of alpha-methylbenzyl isothiocyanate, 16.55 g (122 mmol) of phenyl isothiocyanate and 50 ml of tetrahydrofuran is run in dropwise while keeping the temperature of the mixture below -60° C. On completion of addition, the mixture is held for 0.5 hour at -70° C. and then is left to return to more temperature. The mixture is poured into 500 ml of water. The mixture is acidified to pH=1 by addition of N hydrochloric acid. The product is extracted with ethyl acetate (2 extractions, each with 150 ml of solvent). The solution is dried over magnesium sulfate. The solution is concentrated under reduced pressure. The product is crystallized from 50 ml of ether. The precipitate is filtered. 21 g (yield: 58%) of 3,5-diphenyl-5-methyldithiohydantoin are thus obtained as a yellow powder melting at 157° C. the temperature of the mixture below -60° C On completion of addition is left The product is extracted with ethyl acetate ( 2 extractions The solution is dried over magnesium sulfate The solution is concentrated under reduced pressure The product is crystallized from 50 ml of ether The precipitate is filtered

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

Procedure: 15.1 g (122 mmol) of potassium tert-butoxide are dissolved in 200 ml of tetrahydrofuran in a 500 ml, three-necked, round-bottomed flask under a dry argon atmosphere. The solution is cooled to -70° C. A solution containing 20 g (122 mmol) of alpha-methylbenzyl isothiocyanate, 16.55 g (122 mmol) of phenyl isothiocyanate and 50 ml of tetrahydrofuran is run in dropwise while keeping the temperature of the mixture below -60° C. On completion of addition, the mixture is held for 0.5 hour at -70° C. and then is left to return to more temperature. The mixture is poured into 500 ml of water. The mixture is acidified to pH=1 by addition of N hydrochloric acid. The product is extracted with ethyl acetate (2 extractions, each with 150 ml of solvent). The solution is dried over magnesium sulfate. The solution is concentrated under reduced pressure. The product is crystallized from 50 ml of ether. The precipitate is filtered. 21 g (yield: 58%) of 3,5-diphenyl-5-methyldithiohydantoin are thus obtained as a yellow powder melting at 157° C. the temperature of the mixture below -60° C On completion of addition is left The product is extracted with ethyl acetate ( 2 extractions The solution is dried over magnesium sulfate The solution is concentrated under reduced pressure The product is crystallized from 50 ml of ether The precipitate is filtered

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

Procedure: 15.1 g (122 mmol) of potassium tert-butoxide are dissolved in 200 ml of tetrahydrofuran in a 500 ml, three-necked, round-bottomed flask under a dry argon atmosphere. The solution is cooled to -70° C. A solution containing 20 g (122 mmol) of alpha-methylbenzyl isothiocyanate, 16.55 g (122 mmol) of phenyl isothiocyanate and 50 ml of tetrahydrofuran is run in dropwise while keeping the temperature of the mixture below -60° C. On completion of addition, the mixture is held for 0.5 hour at -70° C. and then is left to return to room temperature. The mixture is poured into 500 ml of water. The mixture is acidified to pH=1 by addition of N hydrochloric acid. The product is extracted with ethyl acetate (2 extractions, each with 150 ml of solvent). The solution is dried over magnesium sulfate. The solution is concentrated under reduced pressure. The product is crystallized from 50 ml of ether. The precipitate is filtered. 21 g (yield: 58%) of 3,5-diphenyl-5-methyldithiohydantoin are thus obtained as a yellow powder melting at 157° C. the temperature of the mixture below -60° C On completion of addition is left to return to room temperature The product is extracted with ethyl acetate ( 2 extractions The solution is dried over magnesium sulfate The solution is concentrated under reduced pressure The product is crystallized from 50 ml of ether The precipitate is filtered

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

Procedure: 15.1 g (122 mmol) of potassium tert-butoxide are dissolved in 200 ml of tetrahydrofuran in a 500 ml, three-necked, round-bottomed flask under a dry argon atmosphere. The solution is cooled to -70° C. A solution containing 20 g (122 mmol) of alpha-methylbenzyl isothiocyanate, 16.55 g (122 mmol) of phenyl isothiocyanate and 50 ml of tetrahydrofuran is run in dropwise while keeping the temperature of the mixture below -60° C. On completion of addition, the mixture is held for 0.5 hour at -70° C. and then is left to return to room temperature. The mixture is poured into 500 ml of water. The mixture is acidified to pH=1 by addition of N hydrochloric acid. The product is extracted with ethyl acetate (2 extractions, each with 150 ml of solvent). The solution is dried over magnesium sulfate. The solution is concentrated under reduced pressure. The product is crystallized from 50 ml of ether. The precipitate is filtered. 21 g (yield: 58%) of 3,5-diphenyl-5-methyldithiohydantoin are thus obtained as a yellow powder melting at 157° C. the temperature of the mixture below -60° C On completion of addition is left to return to room temperature The product is extracted with ethyl acetate ( 2 extractions The solution is dried over magnesium sulfate The solution is concentrated under reduced pressure The product is crystallized from 50 ml of ether The precipitate is filtered

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

Procedure: 15.1 g (122 mmol) of potassium tert-butoxide are dissolved in 200 ml of tetrahydrofuran in a 500 ml, three-necked, round-bottomed flask under a dry argon atmosphere. The solution is cooled to -70° C. A solution containing 20 g (122 mmol) of alpha-methylbenzyl isothiocyanate, 16.55 g (122 mmol) of phenyl isothiocyanate and 50 ml of tetrahydrofuran is run in dropwise while keeping the temperature of the mixture below -60° C. On completion of addition, the mixture is held for 0.5 hour at -70° C. and then is left to return to room temperature. The mixture is poured into 500 ml of water. The mixture is acidified to pH=1 by addition of N hydrochloric acid. The product is extracted with ethyl acetate (2 extractions, each with 150 ml of solvent). The solution is dried over magnesium sulfate. The solution is concentrated under reduced pressure. The product is crystallized from 50 ml of ether. The precipitate is filtered. 21 g (yield: 58%) of 3,5-diphenyl-5-methyldithiohydantoin are thus obtained as a yellow powder melting at 157° C. the temperature of the mixture below -60° C On completion of addition is left to return to room temperature The product is extracted with ethyl acetate ( 2 extractions The solution is dried over magnesium sulfate The solution is concentrated under reduced pressure The product is crystallized from 50 ml of ether The precipitate is filtered

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

Procedure: 15.1 g (122 mmol) of potassium tert-butoxide are dissolved in 200 ml of tetrahydrofuran in a 500 ml, three-necked, round-bottomed flask under a dry argon atmosphere. The solution is cooled to -70° C. A solution containing 20 g (122 mmol) of alpha-methylbenzyl isothiocyanate, 16.55 g (122 mmol) of phenyl isothiocyanate and 50 ml of tetrahydrofuran is run in dropwise while keeping the temperature of the mixture below -60° C. On completion of addition, the mixture is held for 0.5 hour at -70° C. and then is left to return to room temperature. The mixture is poured into 500 ml of water. The mixture is acidified to pH=1 by addition of N hydrochloric acid. The product is extracted with ethyl acetate (2 extractions, each with 150 ml of solvent). The solution is dried over magnesium sulfate. The solution is concentrated under reduced pressure. The product is crystallized from 50 ml of ether. The precipitate is filtered. 21 g (yield: 58%) of 3,5-diphenyl-5-methyldithiohydantoin are thus obtained as a yellow powder melting at 157° C. the temperature of the mixture below -60° C On completion of addition is left to return to room temperature The product is extracted with ethyl acetate ( 2 extractions The solution is dried over magnesium sulfate The solution is concentrated under reduced pressure The product is crystallized from 50 ml of ether The precipitate is filtered

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

Procedure: 15.1 g (122 mmol) of potassium tert-butoxide are dissolved in 200 ml of tetrahydrofuran in a 500 ml, three-necked, round-bottomed flask under a dry argon atmosphere. The solution is cooled to -70° C. A solution containing 20 g (122 mmol) of alpha-methylbenzyl isothiocyanate, 16.55 g (122 mmol) of phenyl isothiocyanate and 50 ml of tetrahydrofuran is run in dropwise while keeping the temperature of the mixture below -60° C. On completion of addition, the mixture is held for 0.5 hour at -70° C. and then is left to return to more temperature. The mixture is poured into 500 ml of water. The mixture is acidified to pH=1 by addition of N hydrochloric acid. The product is extracted with ethyl acetate (2 extractions, each with 150 ml of solvent). The solution is dried over magnesium sulfate. The solution is concentrated under reduced pressure. The product is crystallized from 50 ml of ether. The precipitate is filtered. 21 g (yield: 58%) of 3,5-diphenyl-5-methyldithiohydantoin are thus obtained as a yellow powder melting at 157° C. the temperature of the mixture below -60° C On completion of addition is left The product is extracted with ethyl acetate ( 2 extractions The solution is dried over magnesium sulfate The solution is concentrated under reduced pressure The product is crystallized from 50 ml of ether The precipitate is filtered

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

Procedure: The title compound was prepared from 3-amino-5-chlorothiophene-2-sulfonamide hydrochloride and D-α-methylbenzyl isothiocyanate by a procedure analogous to the procedure described in example 3-a (yield 96% impure product); 1H-NMR (DMSO-d6): δ1.46 (d, 3H, CH3), 5.36 (quint, 1H, CH), 6.45 (br s, 2H, NH2), 6.64 (s, 1H, H-4), 7.2-7.4 (m, 5H, ArH), 8.53 (br d, 1H, NH), 11.3 (br s, 1H).

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

Procedure: 15.1 g (122 mmol) of potassium tert-butoxide are dissolved in 200 ml of tetrahydrofuran in a 500 ml, three-necked, round-bottomed flask under a dry argon atmosphere. The solution is cooled to −70° C. A solution containing 20 g (122 mmol) of alpha-methylbenzyl isothiocyanate, 16.55 g (122 mmol) of phenyl isothiocyanate and 50 ml of tetrahydrofuran is run in dropwise while keeping the temperature of the mixture below −60° C. On completion of addition, the mixture is held for 0.5 hour at −70° C. and then is left to return to room temperature. The mixture is poured into 500 ml of water. The mixture is acidified to pH=1 by addition of N hydrochloric acid. The product is extracted with ethyl acetate (2 extractions, each with 150 ml of solvent). The solution is dried over magnesium sulfate. The solution is concentrated under reduced pressure. The product is crystallized from 50 ml of ether. The precipitate is filtered. 21 g (yield: 58%) of 3,5-diphenyl-5-methyldithiohydantoin are thus obtained as a yellow powder melting at 157° C. the temperature of the mixture below −60° C On completion of addition is left to return to room temperature The product is extracted with ethyl acetate ( 2 extractions The solution is dried over magnesium sulfate The solution is concentrated under reduced pressure The product is crystallized from 50 ml of ether The precipitate is filtered

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

Procedure: 15.1 g (122 mmol) of potassium tert-butoxide are dissolved in 200 ml of tetrahydrofuran in a 500 ml, three-necked, round-bottomed flask under a dry argon atmosphere. The solution is cooled to -70° C. A solution containing 20 g (122 mmol) of alpha-methylbenzyl isothiocyanate, 16.55 g (122 mmol) of phenyl isothiocyanate and 50 ml of tetrahydrofuran is run in dropwise while keeping the temperature of the mixture below -60° C. On completion of addition, the mixture is held for 0.5 hour at -70° C. and then is left to return to room temperature. The mixture is poured into 500 ml of water. The mixture is acidified to pH=1 by addition of N hydrochloric acid. The product is extracted with ethyl acetate (2 extractions, each with 150 ml of solvent). The solution is dried over magnesium sulfate. The solution is concentrated under reduced pressure. The product is crystallized from 50 ml of ether. The precipitate is filtered. 21 g (yield: 58%) of 3,5-diphenyl-5-methyldithiohydantoin are thus obtained as a yellow powder melting at 157° C. the temperature of the mixture below -60° C On completion of addition is left to return to room temperature The product is extracted with ethyl acetate ( 2 extractions The solution is dried over magnesium sulfate The solution is concentrated under reduced pressure The product is crystallized from 50 ml of ether The precipitate is filtered

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

Procedure: The title compound was prepared from 3-amino-5-chlorothiophene-2-sulfonamide hydrochloride and L-α-methylbenzyl isothiocyanate by a procedure analogous to the procedure described in example 3Bc-d; mp 195°-204° C. (ethyl acetate), 1H-NMR (DMSO-d6): δ 1.46 (d, 3H), 4.95 (m, 1H), 7.1 (s, 1H), 7.2-7.45 (m, 5H), 7.78 (br. s, 1H), 10.85 (s, 1H).

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

Procedure: 15.1 g (122 mmol) of potassium tert-butoxide are dissolved in 200 ml of tetrahydrofuran in a 500 ml, three-necked, round-bottomed flask under a dry argon atmosphere. The solution is cooled to -70° C. A solution containing 20 g (122 mmol) of alpha-methylbenzyl isothiocyanate, 16.55 g (122 mmol) of phenyl isothiocyanate and 50 ml of tetrahydrofuran is run in dropwise while keeping the temperature of the mixture below -60° C. On completion of addition, the mixture is held for 0.5 hour at -70° C. and then is left to return to room temperature. The mixture is poured into 500 ml of water. The mixture is acidified to pH=1 by addition of N hydrochloric acid. The product is extracted with ethyl acetate (2 extractions, each with 150 ml of solvent). The solution is dried over magnesium sulfate. The solution is concentrated under reduced pressure. The product is crystallized from 50 ml of ether. The precipitate is filtered. 21 g (yield: 58%) of 3,5-diphenyl-5-methyldithiohydantoin are thus obtained as a yellow powder melting at 157° C. the temperature of the mixture below -60° C On completion of addition is left to return to room temperature The product is extracted with ethyl acetate ( 2 extractions The solution is dried over magnesium sulfate The solution is concentrated under reduced pressure The product is crystallized from 50 ml of ether The precipitate is filtered