Methanesulfonamide → 3-Hydroxy-4-methanesulfonylamino-4-oxo-but-2-enoic acid (2-isopropoxy-benzyl)-methoxy-amide

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Reaction Steps

Reaction of 2-(2,2-dimethyl-5-oxo-[1,3]dioxolan-4-ylidene)-N-(2-isopropoxy-benzyl)-N-methoxy-acetamide (0.234 g, 0.67 mmol) with methanesulfonamide (0.064 g, 0.67 mmol) as described in the preparation of compound 22 gave 0.135 g (53% yield) of the title amide as a light yellow solid. 1H NMR (400 MHz, DMSO) δ: mixture of rotamers: 1.25 and 1.30 (2×3H, 2 d, J=6 Hz, CH3), 2.86 and 2.88 (3H, 2 S, SO2CH3), 3.63 and 3.67 (3H, 2 s, OCH3), 4.62 (1H, m, CH), 4.76 (2H, s, NCH2), 6.19 and 6.23 (1H, 2 s, CH), 6.8-7.2 (4H, m, aromatics). HRMS (ESI/neg) calculated for C16H21N2O7S: [M−H]−: 385.106948; found: 385.106655.

Provenance & Evidence