Potassium Phosphate, Dibasic → Benzyl ((3S,4R)-2-oxo-4-((2-oxopyridin-1(2H)-yl)methyl)azetidin-3-yl)carbamate

Participants

Reaction Conditions

Reaction Steps

Prepared in an analogous manner to example 4, step 2 using Benzyl ((3S,4R)-1-(2,4-dimethoxybenzyl)-2-oxo-4-((2-oxopyridin-1(2H)-yl)methyl)azetidin-3-yl)carbamate (361 mg, 0.622 mmol), K2S2O8 (225 mg, 0.833 mmol) and K2HPO4 (135 mg, 0.773 mmol) in ACN:water (2:1, 9.9 mL) while heating for 1.5 h at 90° C. More K2S2O8 (45 mg, 0.17 mmol) and K2HPO4 (26.9 mg, 0.155 mmol) were added and heated for another 30 min, whereupon it was concentrated, redissolved in EtOAc, washed with brine, dried over Na2SO4, and concentrated in vacuo. The crude residue was purified via silica gel chromatography (MeOH-DCM, 0-10%) to afford the title compound (157 mg, 81%). LCMS: Rt=0.56 min, m/z=328.2 (M+1) Method 2m_acidic.

Provenance & Evidence