反应详情

To a solution of (Z)-2-((1-((benzhydryloxy)carbonyl)cyclopropoxy)imino)-2-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)acetic acid (prepared according to Yamawaki et al. Bioorg. Med. Chem. Lett. 2007, 15, 6716-6732) (150 mg, 0.279 mmol) in DCM:DMF (1:1, 2.8 mL) at 0° C. was added DIPEA (146 μL, 0.837 mmol) followed by HATU (127 mg, 0.335 mmol). To the resulting solution, after 20 min, was added a solution of (3S,4R)-4-((1H-1,2,4-triazol-1-yl)methyl)-3-aminoazetidin-2-one (51 mg, 0.31 mmol) in DCM. After 1 h of stirring it was diluted with EtOAc, washed with water, brine, dried over Na2SO4 and concentrated in vacuo. The crude residue was purified via silica gel chromatography (Acetone-DCM) to afford the title compound (147 mg, 77%). LCMS: Rt=0.98 min, m/z=687.1 (M+1) Method 2m_acidic.

1. washwashed with water, brine
2. dry with materialdried over Na2SO4
3. concentrationconcentrated in vacuo
4. customThe crude residue was purified via silica gel chromatography (Acetone-DCM)