Boron trifluoride etherate → HCID 86714022, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of crude compound 23 (7.14 g 14.4 mmol) in CH2Cl2/CH3CN (75 mL/75 mL) were added triethylsilane (4.6 mL, 28.9 mmol) and boron trifluoride diethyl etherate (3.6 mL, 28.9 mmol) at −55° C. The mixture was allowed to slowly warm to 0° C. To a mixture was added aq. saturated NaHCO3 solution (75 mL) to quench the reaction and the mixture was evaporated in vacuo to remove CH2Cl2 and CH3CN. The mixture was extracted with EtOAc (100 mL×2). The combined organic layer was dried over MgSO4, filtered, and concentrated in vacuo. The crude (3R,4R,5S,6R)-2-(2-(allyloxy)-4-chloro-5-(4-ethoxybenzyl)phenyl)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol (24, 6.36 g) was carried on to the next step without further purification.

Provenance & Evidence