Triethylamine → (+/-)-Methanesulfonic acid 2-[(2-benzyloxy-5-fluoro-phenyl)-methanesulfonyloxy-methyl]-benzyl ester

Temperature

0 °C

To an ice-cooled solution of (±)-(2-benzyloxy-5-fluoro-phenyl)-(2-hydroxymethyl-phenyl)-methanol (500 mg, 1.48 mmol, 1.00 eq.) and DMAP (9 mg, 0.07 mmol, 0.05 eq.) in DCM (30 mL), NEt3 (0.82 mL, 5.91 mmol, 4.00 eq.) and methanesulfonyl chloride (0.24 mL, 3.10 mmol, 2.10 eq.) were added dropwise. The mixture was stirred at 0° C. for 1 hour and further at r.t. for 2 hours. The reaction mixture was diluted with H2O (50 mL) and DCM (50 mL). The layers were separated. The aq. phase was extracted with DCM (2×50 mL). The comb. org. phases were washed with water (1×150 mL), sat. aq. NaCl soln. (1×50 mL), dried over MgSO4, and concentrated in vacuo to give (±)-methanesulfonic acid 2-[(2-benzyloxy-5-fluoro-phenyl)-methanesulfonyloxy-methyl]-benzyl ester.

1. additionwere added dropwise
2. customThe layers were separated
3. extractionThe aq. phase was extracted with DCM (2×50 mL)
4. washphases were washed with water (1×150 mL), sat. aq. NaCl soln
5. dry with material(1×50 mL), dried over MgSO4
6. concentrationconcentrated in vacuo

ORD record

ord-8fb8d60eee3a4487a028808cc4f4beec

Source dataset

uspto-grants-2013_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08575158B2