4-[(2S,3R)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]-1-(4-{3-[(methylsulfonyl)amino]propyl}phenyl)-4-oxoazetidin-2-yl]phenyl methyl beta-D-glucopyranosiduronate → 4-[(2S,3R)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]-1-(4-{3-[(methylsulfonyl)amino]propyl}phenyl)-4-oxoazetidin-2-yl]phenyl beta-D-glucopyranosiduronic acid

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Reaction Steps

A solution of 9a in methanol/water/triethylamine (1:7:2, 1 mL) was stirred at room temperature for approximately 1 h. The volatiles were evaporated in vacuo and the crude residue purified by preparative reversed phase high performance liquid chromatography on YMC Pack Pro C18 phase (gradient elution; 10-65% acetonitrile/water as eluent, 0.1% TFA modifier) to give the title compound (9b); m/z (ES) 735 (M+Na)+, 685 (M-OH)+, 509 (M-sugar-OH)+; HRMS (ES) m/z calc'd for C34H39FN2O11S (MH+) 703.2337, found 703.2337.

Provenance & Evidence