Acetic Acid → HCID 58781936, compound

Participants

Reaction Steps

A solution of allyl (4R,5S,6S)-3-({4-[(2R)-2-({[tert-butyl(dimethyl)silyl]oxy}methyl)-1-methyl-2,5-dihydro-1H-pyrrol-3-yl]-1,3-thiazol-2-yl}sulfanyl)-4-methyl-7-oxo-6-{(1R)-1-[(trimethylsilyl)oxy]ethyl}-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate(106 mg, 0.16 mmol) in THF (2.7 ml) was cooled at 0° C. and to the solution were added acetic acid (0.073 ml, 1.28 mmol) and tetrabutylammonium fluoride in THF (1M, 0.64 ml, 0.64 mmol). The solution was stirred at the same temperature for 1 hour and then was allowed to stand in a refrigerator for 63 hours. To the reaction mixture was added water, and the solution was extracted three times with ethyl acetate. The organic layer was washed with a saturated aqueous sodium chloride solution and dried over anhydrous sodium sulfate. After removal of the solvent in vacuo, the residue was purified with silica gel chromatography and then was subjected to de-allyl reaction in the same manner as Example 1.c) to give (4R,5S,6S)-6-[(1R)-1-hydroxyethyl]-3-({4-[(2R)-2-hydroxymethyl-1-methyl-2,5-dihydro-1H-pyrrol-3-yl]-1,3-thiazol-2-yl}sulfanyl)-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid.

Provenance & Evidence