2-chloro-N-(2-methoxyethyl)acetamide → [N-(2-Methoxyethyl)carbamoyl]methyl methyl(2E)but-2-ene-1,4-dioate

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[C:1]([O:8][CH3:9])(=[O:7])/[CH:2]=[CH:3]/[C:4]([OH:6])=[O:5].[CH3:10][O:11][CH2:12][CH2:13][NH:14][C:15](=[O:18])[CH2:16]Cl.C(=O)([O-])O.[Cs+]>CN1C(=O)CCC1>[C:4]([O:6][CH2:16][C:15](=[O:18])[NH:14][CH2:13][CH2:12][O:11][CH3:10])(=[O:5])/[CH:3]=[CH:2]/[C:1]([O:8][CH3:9])=[O:7]

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실험 절차

Following general procedure A, methyl hydrogen fumarate (MHF) (0.50 g, 3.84 mmol) dissolved in NMP was reacted at ca. 55° C. with N-(2-methoxyethyl)chloroacetamide (0.69 g, 4.60 mmol) in the presence of CsHCO3 (0.89 g, 4.61 mmol) to afford 0.07 g (8% yield) of the title compound (5) as a white solid after purification by mass-guided preparative HPLC and lyophilization. 1H NMR (CDCl3, 400 MHz): δ 6.94-6.92 (m, 2H), 6.46 (br s, 1H), 4.68 (s, 2H), 3.83 (s, 3H), 3.52-3.46 (m, 4H), 3.36 (s, 3H). MS (ESI): m/z 245.98 (M+H)+.