Morpholine, 4-(chloroacetyl)- → Methyl 2-morpholin-4-yl-2-oxoethyl(2E)but-2-ene-1,4-dioate

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Reaktionsschritte

Following general procedure A, methyl hydrogen fumarate (MHF) (0.50 g, 3.84 mmol) dissolved in NMP was reacted at ca. 55° C. with 4-(chloroacetyl) morpholine (0.75 g, 4.61 mmol) in the presence of CsHCO3 (0.89 g, 4.61 mmol) to afford 0.34 g (35% yield) of the title compound (3) as a white solid after purification by mass-guided preparative HPLC and lyophilization. M.p.: 124 to 126° C.; 1H NMR (CDCl3, 400 MHz): δ 6.97-6.91 (m, 2H), 4.84 (s, 2H), 3.82 (s, 3H), 3.72-3.70 (m, 4H), 3.64-3.62 (m, 2H), 3.46-3.41 (m, 2H). MS (ESI): m/z 258.04 (M+H)+.

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