反应详情

(3R,4S)-3-[(3S)-3-(4-Fluorophenyl)-3-hydroxypropyl]-1-phenyl-4-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]azetidin-2-one (51.3 mg, 0.102 mmol) and (1S)-2,3,4,6-tetra-O-acetyl-1,5-anhydro-1-(3-bromophenyl)-D-glucitol (35.5 mg, 0.073 mmol) were dissolved in 2.0 mL of toluene and 0.25 mL of ethanol. 0.075 mL of 4 N potassium carbonate was added to the mixture followed by 5.0 mg of tetrakis(triphenylphosphine)palladium(0). The entire reaction was degassed three times with argon then heated to reflux for 4 h. The reaction was cooled to room temperature, diluted with 5 mL of water, and extracted with ethyl acetate (3×25 mL). The organic layers were combine, dried over sodium sulfate, filtered, concentrated and purified by column chromatography (12 g silica gel, 5% to 95% ethyl acetate-hexane) to afford 10.5 mg (13%) of (1S)-2,3,4,6-tetra-O-acetyl-1,5-anhydro-1-(4′-{(2S,3R)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]-4-oxo-1-phenylazetidin-2-yl}biphenyl-3-yl)-D-glucitol as a clear oil.

1. customThe entire reaction
2. customwas degassed three times with argon
3. temperaturethen heated
4. temperatureto reflux for 4 h
5. additiondiluted with 5 mL of water
6. extractionextracted with ethyl acetate (3×25 mL)
7. dry with materialdried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated
10. custompurified by column chromatography (12 g silica gel, 5% to 95% ethyl acetate-hexane)