164162-36-1

2-(tert-butyldiMethylsilyl )oxyl alcohol trifluorin Methanesulfonate is used as organic synthesis intermediate and pharmaceutical intermediate, mainly used in laboratory research and development process and chemical production process.

The reaction was carried out under a nitrogen atmosphere. TBS- ethylene glycol prepared as per step 1 (85.10g, 0.48 mol) and 2, 6-Lutidine (84.28ml, 0.72 mol) were stirred in n-heptane (425ml) to give a clear solution which was then cooled to -15 to - 25°C. Trifluoromethanesulfonic anhydride (Tf2O) (99.74 ml, 0.590 mol) was added drop-wise over a period of 45 minutes to the n-heptane solution (white precipitate starts to form immediately) while maintaining the reaction at -15 to -25°C. The reaction mixture was kept at temperature between -15 to -25°C for 2 hours. The precipitate generated was filtered off. The filtrate was then evaporated up to ~2 volumes with respect to TBS-ethyiene glycol (~200 ml).