3-(2-hydroxyethyl)pentane-1,5-diol

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

Procedure: To an stirred ice-cooled solution of tris(2-hydroxyethyl)methane (10 g, 0.0676 mol) in dichloromethane (50 ml) was slowly dripped a solution of methanesulphonyl chloride (40 g, 0.349 mol) in dichloromethane (50 ml) under nitrogen at such a rate that the temperature did not rise above 15° C. Pyridine (21.4 g, 0.27 mol, 4 eq) dissolved in dichloromethane (50 ml) was then added drop-wise at such a rate that the temperature did not rise above 15° C., exothermic reaction. The reaction was left to stir at room temperature for 24 h and then treated with 5N hydrochloric acid solution (80 ml) and the layers separated. The aqueous layer was extracted with further dichloromethane (50 ml) and the organic extracts combined, dried over sodium sulphate, filtered and concentrated in vacuo to give tris[2-(methylsulphonyloxy)ethyl]methane contaminated with excess methanesulphonyl chloride. The theoretical yield was 25.8 g. did not rise above 15° C was then added drop-wise at such a rate that the temperature did not rise above 15° C. exothermic reaction The reaction was left the layers separated The aqueous layer was extracted with further dichloromethane (50 ml) dried over sodium sulphate filtered concentrated in vacuo

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

Procedure: To an stirred ice-cooled solution of tris(2-hydroxyethyl)methane (10 g, 0.0676 mol) in dichloromethane (50 ml) was slowly dripped a solution of methanesulphonyl chloride (40 g, 0.349 mol) in dichloromethane (50 ml) under nitrogen at such a rate that the temperature did not rise above 15° C. Pyridine (21.4 g, 0.27 mol, 4 eq) dissolved in dichloromethane (50 ml) was then added drop-wise at such a rate that the temperature did not rise above 15° C., exothermic reaction. The reaction was left to stir at room temperature for 24 h and then treated with 5N hydrochloric acid solution (80 ml) and the layers separated. The aqueous layer was extracted with further dichloromethane (50 ml) and the organic extracts combined, dried over sodium sulphate, filtered and concentrated in vacuo to give tris[2-(methylsulphonyloxy)ethyl]methane contaminated with excess methanesulphonyl chloride. The theoretical yield was 25.8 g. did not rise above 15° C was then added drop-wise at such a rate that the temperature did not rise above 15° C. exothermic reaction The reaction was left the layers separated The aqueous layer was extracted with further dichloromethane (50 ml) dried over sodium sulphate filtered concentrated in vacuo

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

Procedure: To an stirred ice-cooled solution of tris(2hydroxyethyl)methane (10 g, 0.0676 mol) in dichloromethane (50 ml) was slowly dripped a solution of methanesulphonyl chloride (40 g, 0.349 mol) in dichloromethane (50 ml) under nitrogen at such a rate that the temperature did not rise above 15° C. Pyridine (21.4 g, 0.27 mol, 4 eq) dissolved in dichloromethane (50 ml) was then added drop-wise at such a rate that the temperature did not rise above 15° C., exothermic reaction. The reaction was left to stir at room temperature for 24 h and then treated with 5 N hydrochloric acid solution (80 ml) and the layers separated. The aqueous layer was extracted with further dichloromethane (50 ml) and the organic extracts combined, dried over sodium sulphate, filtered and concentrated in vacuo to give tris[2-(methylsulphonyloxy)ethyl]methane contaminated with excess methanesulphonyl chloride. The theoretical yield was 25.8 g. did not rise above 15° C was then added drop-wise at such a rate that the temperature did not rise above 15° C. exothermic reaction The reaction was left the layers separated The aqueous layer was extracted with further dichloromethane (50 ml) dried over sodium sulphate filtered concentrated in vacuo

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

Procedure: To an stirred ice-cooled solution of tris(2-hydroxyethyl)methane (10 g, 0.0676 mol) in dichloromethane (50 ml) was slowly dripped a solution of methanesulfonyl chloride (40 g, 0.349 mol) in dichloromethane (50 ml) under nitrogen at such a rate that the temperature did not rise above 15° C. Pyridine (21.4 g, 0.27 mol, 4 eq) dissolved in dichloromethane (50 ml) was then added drop-wise at such a rate that the temperature did not rise above 15° C., exothermic reaction. The reaction was left to stir at room temperature for 24 h and then treated with 5N hydrochloric acid solution (80 ml) and the layers separated. The aqueous layer was extracted with further dichloromethane (50 ml) and the organic extracts combined, dried over sodium sulfate, filtered and concentrated in vacuo to give tris[2-(methylsulfonyloxy)ethyl]methane contaminated with excess methanesulfonyl chloride. The theoretical yield was 25.8 g. did not rise above 15° C was then added drop-wise at such a rate that the temperature did not rise above 15° C. exothermic reaction The reaction was left the layers separated The aqueous layer was extracted with further dichloromethane (50 ml) dried over sodium sulfate filtered concentrated in vacuo

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of triphenylphosphine (1.77 g, 6.8 mmol) in anhydrous THF (15 mL) was added diethyl azodicarboxylate (2.2 M in toluene, 2.4 mL, 5.4 mmol) dropwise at 0° C. After stirred at 0° C. for 55 minutes, a solution of 3-(2-hydroxyethyl)pentane-1,5-diol (740 mg, 5 mmol) and thioacetic acid (335 μL, 4.5 mmol) in dry THF (7 mL) was added dropwise. After 1 hour the ice/water bath was removed and the reaction was stirred at room temperature for 16 hours. The solvents were removed by rotary evaporation in vacuo. The residue was purified by flash chromatography (CHCl3/MeOH, 20:1, 15:1, 10:1, 4:1) to give 3-(2-acetylthioethyl)pentane-1,5-diol as white solid (350 mg) and recovered starting material triol (406 mg). 1H NMR (400 Hz, CDCl3): δ 3.65-3.63 (m, 4H), 3.45 (bs, 2H), 2.84-2.80 (m, 2H), 2.28 (s, 3H), 1.73-1.67 (m, 1H), 1.55-1.49 (m, 6H). MS (ESI): m/z 229.0 (M+Na)+. After 1 hour the ice/water bath was removed the reaction was stirred at room temperature for 16 hours The solvents were removed by rotary evaporation in vacuo The residue was purified by flash chromatography (CHCl3/MeOH, 20:1, 15:1, 10:1, 4:1)

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

Procedure: To an stirred ice-cooled solution of tris(2-hydroxyethyl)methane (10 g, 0.0676 mol) in dichloromethane (50 ml) was slowly dripped a solution of methanesulphonyl chloride (40 g, 0.349 mol) in dichloromethane (50 ml) under nitrogen at such a rate that the temperature did not rise above 15° C. Pyridine (21.4 g, 0.27 mol, 4 eq) dissolved in dichloromethane (50 ml) was then added drop-wise at such a rate that the temperature did not rise above 15° C., exothermic reaction. The reaction was left to stir at room temperature for 24 h and then treated with 5N hydrochloric acid solution (80 ml) and the layers separated. The aqueous layer was extracted with further dichloromethane (50 ml) and the organic extracts combined, dried over sodium sulphate, filtered and concentrated in vacuo to give tris(2-(methylsulphonyloxy)ethyl)methane contaminated with excess methanesulphonyl chloride. Theoretical yield was 25.8 g. did not rise above 15° C was then added drop-wise at such a rate that the temperature did not rise above 15° C. exothermic reaction The reaction was left the layers separated The aqueous layer was extracted with further dichloromethane (50 ml) dried over sodium sulphate filtered concentrated in vacuo

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

Procedure: To an stirred ice-cooled solution of tris(2-hydroxyethyl)methane (10 g, 0.0676 mol) in dichloromethane (50 ml) was slowly dripped a solution of methanesulphonyl chloride (40 g, 0.349 mol) in dichloromethane (50 ml) under nitrogen at such a rate that the temperature did not rise above 15° C. Pyridine (21.4 g, 0.27 mol, 4 eq) dissolved in dichloromethane (50 ml) was then added drop-wise at such a rate that the temperature did not rise above 15° C., exothermic reaction. The reaction was left to stir at room temperature for 24 h and then treated with 5N hydrochloric acid solution (80 ml) and the layers separated. The aqueous layer was extracted with further dichloromethane (50 ml) and the organic extracts combined, dried over sodium sulphate, filtered and concentrated in vacuo to give tris[2-(methylsulphonyloxy)ethyl]methane contaminated with excess methanesulphonyl chloride. The theoretical yield was 25.8 g. did not rise above 15° C was then added drop-wise at such a rate that the temperature did not rise above 15° C. exothermic reaction The reaction was left the layers separated The aqueous layer was extracted with further dichloromethane (50 ml) dried over sodium sulphate filtered concentrated in vacuo