N-Benzyl-2-chloroacetamide → Methyl [N-benzylcarbamoyl]methyl(2E)but-2-ene-1,4-dioate

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Following general procedure A, methyl hydrogen fumarate (MHF) (0.50 g, 3.85 mmol) dissolved in NMP was reacted at ca. 55° C. with N-benzyl chloroacetamide (0.84 g, 4.61 mmol) in the presence of CsHCO3 (0.89 g, 4.61 mmol) to afford 0.56 g (53% yield) of the title compound (2) as a white solid after purification by mass-guided preparative HPLC and lyophilization. 1H NMR (CDCl3, 400 MHz): δ 7.36-7.26 (m, 5H), 6.94-6.88 (m, 2H), 6.19 (br s, 1H), 4.73 (s, 2H), 4.51 (d, J=5.6 Hz, 2H), 3.81 (s, 3H). MS (ESI): m/z 278.04 (M+H)+.

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