2-(4-fluorophenyl)ethyl methanesulfonate

Conditions: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suitable reactor maintained under nitrogen was charged with 4-fluorophenethyl alcohol (2.6 kg, 18.6 mol) and 18 L of methylene chloride. The stirred solution was cooled to and maintained at 0-5° C. while triethylamine 2.85 kg (28.2 mol) was added fairly rapidly. The reaction temperature was maintained at 0-5° C. while adding methanesulfonyl chloride (2.5 kg, 21.8 mol) over 1 hour. The stirred reaction mixture was maintained at 0-5° C. for 1 hour, then it was warmed to room temperature within approximately 2 hours. The reaction mixture was diluted with a solution of 0.5 kg of 33% hydrochloric acid in 10 L of water. The organic phase was separated and washed with a solution of 0.2 kg of 33% hydrochloric acid in 5 L of water. Both acidic extracts were combined and extracted with 5 L of methylene chloride. Both organic phases were combined, washed with 2×15 L of water, then dried with sodium sulfate (2 kg). Drying agent was filtered off and washed with 2×5 L of methylene chloride. The majority of the solvent was boiled off at atmospheric pressure, with the final amount distilled off at 35° C./500 torr to give 4-fluorophenethyl alcohol methanesulfonate (4.17 kg.) A suitable reactor maintained under nitrogen The stirred solution was cooled to and was added fairly rapidly The stirred reaction mixture was maintained at 0-5° C. for 1 hour it was warmed to room temperature within approximately 2 hours The organic phase was separated washed with a solution of 0.2 kg of 33% hydrochloric acid in 5 L of water extracted with 5 L of methylene chloride washed with 2×15 L of water dried with sodium sulfate (2 kg) Drying agent was filtered off washed with 2×5 L of methylene chloride with the final amount distilled off at 35° C./500 torr

Conditions: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suitable reactor maintained under nitrogen was charged with 4-fluorophenethyl alcohol (2.6 kg, 18.6 mol) and 18 L of methylene chloride. The stirred solution was cooled to and maintained at 0-5° C. while triethylamine 2.85 kg (28.2 mol) was added fairly rapidly. The reaction temperature was maintained at 0-5° C. while adding methanesulfonyl chloride (2.5 kg, 21.8 mol) over 1 hour. The stirred reaction mixture was maintained at 0-5° C. for 1 hour, then it was warmed to room temperature within approximately 2 hours. The reaction mixture was diluted with a solution of 0.5 kg of 33% hydrochloric acid in 10 L of water. The organic phase was separated and washed with a solution of 0.2 kg of 33% hydrochloric acid in 5 L of water. Both acidic extracts were combined and extracted with 5 L of methylene chloride. Both organic phases were combined, washed with 2×15 L of water, then dried with sodium sulfate (2 kg). Drying agent was filtered off and washed with 2×5 L of methylene chloride. The majority of the solvent was boiled off at atmospheric pressure, with the final amount distilled off at 35° C./500 torr to give 4-fluorophenethyl alcohol methanesulfonate (4.17 kg.) A suitable reactor maintained under nitrogen The stirred solution was cooled to and was added fairly rapidly The stirred reaction mixture was maintained at 0-5° C. for 1 hour it was warmed to room temperature within approximately 2 hours The organic phase was separated washed with a solution of 0.2 kg of 33% hydrochloric acid in 5 L of water extracted with 5 L of methylene chloride washed with 2×15 L of water dried with sodium sulfate (2 kg) Drying agent was filtered off washed with 2×5 L of methylene chloride with the final amount distilled off at 35° C./500 torr

Conditions: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suitable reactor maintained under nitrogen was charged with 4-fluorophenethyl alcohol (2.6 kg, 18.6 mol) and 18 L of methylene chloride. The stirred solution was cooled to and maintained at 0-5° C. while triethylamine 2.85 kg (28.2 mol) was added fairly rapidly. The reaction temperature was maintained at 0-5° C. while adding methanesulfonyl chloride (2.5 kg, 21.8 mol) over 1 hour. The stirred reaction mixture was maintained at 0-5° C. for 1 hour, then it was warmed to room temperature within approximately 2 hours. The reaction mixture was diluted with a solution of 0.5 kg of 33% hydrochloric acid in 10 L of water. The organic phase was separated and washed with a solution of 0.2 kg of 33% hydrochloric acid in 5 L of water. Both acidic extracts were combined and extracted with 5 L of methylene chloride. Both organic phases were combined, washed with 2×15 L of water, then dried with sodium sulfate (2 kg). Drying agent was filtered off and washed with 2×5 L of methylene chloride. The majority of the solvent was boiled off at atmospheric pressure, with the final amount distilled off at 35° C./500 torr to give 4-fluorophenethyl alcohol methanesulfonate (4.17 kg.) A suitable reactor maintained under nitrogen The stirred solution was cooled to and was added fairly rapidly The stirred reaction mixture was maintained at 0-5° C. for 1 hour it was warmed to room temperature within approximately 2 hours The organic phase was separated washed with a solution of 0.2 kg of 33% hydrochloric acid in 5 L of water extracted with 5 L of methylene chloride washed with 2×15 L of water dried with sodium sulfate (2 kg) Drying agent was filtered off washed with 2×5 L of methylene chloride with the final amount distilled off at 35° C./500 torr

Conditions: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suitable reactor maintained under nitrogen was charged with 4-fluorophenethyl alcohol (2.6 kg, 18.6 mol) and 18 L of methylene chloride. The stirred solution was cooled to and maintained at 0-5° C. while triethylamine 2.85 kg (28.2 mol) was added fairly rapidly. The reaction temperature was maintained at 0-5° C. while adding methanesulfonyl chloride (2.5 kg, 21.8 mol) over 1 hour. The stirred reaction mixture was maintained at 0-5° C. for 1 hour, then it was warmed to room temperature within approximately 2 hours. The reaction mixture was diluted with a solution of 0.5 kg of 33% hydrochloric acid in 10 L of water. The organic phase was separated and washed with a solution of 0.2 kg of 33% hydrochloric acid in 5 L of water. Both acidic extracts were combined and extracted with 5 L of methylene chloride. Both organic phases were combined, washed with 2×15 L of water, then dried with sodium sulfate (2 kg). Drying agent was filtered off and washed with 2×5 L of methylene chloride. The majority of the solvent was boiled off at atmospheric pressure, with the final amount distilled off at 35° C./500 torr to give 4-fluorophenethyl alcohol methanesulfonate (4.17 kg.) A suitable reactor maintained under nitrogen The stirred solution was cooled to and was added fairly rapidly The stirred reaction mixture was maintained at 0-5° C. for 1 hour it was warmed to room temperature within approximately 2 hours The organic phase was separated washed with a solution of 0.2 kg of 33% hydrochloric acid in 5 L of water extracted with 5 L of methylene chloride washed with 2×15 L of water dried with sodium sulfate (2 kg) Drying agent was filtered off washed with 2×5 L of methylene chloride with the final amount distilled off at 35° C./500 torr