4-O-[2-(二乙氨基)-2-氧乙基] 1-O-甲基 (E)-丁-2-烯二酸酯

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Following general procedure A, methyl hydrogen fumarate (MHF) (0.39 g, 3.00 mmol) dissolved in NMP was reacted at ca. 55° C. with 2-chloro-N,N-diethylacetamide (0.44 g, 3.00 mmol) in the presence of CsHCO3 (0.69 g, 3.60 mmol) to afford 0.37 g (51% yield) of the title compound (1) after purification by silica gel column chromatography (Biotage) using a mixture of ethyl acetate (EtOAc) and hexanes (1:1) as eluent. M.p.: 53-56° C. 1H NMR (CDCl3, 400 MHz): δ 6.99-6.90 (m, 2H), 4.83 (s, 2H), 3.80 (s, 3H), 3.39 (q, J=7.2 Hz, 2H), 3.26 (q, J=7.2 Hz, 2H), 1.24 (t, J=7.2 Hz, 3H), 1.14 (t, J=7.2 Hz, 3H). MS (ESI): m/z 244.13 (M+H)+.

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Following general procedure A, methyl hydrogen fumarate (MHF) (0.39 g, 3.00 mmol) dissolved in NMP was reacted at ca. 55° C. with 2-chloro-N,N-diethylacetamide (0.44 g, 3.00 mmol) in the presence of CsHCO3 (0.69 g, 3.60 mmol) to afford 0.37 g (51% yield) of the title compound (1) after purification by silica gel column chromatography (Biotage) using a mixture of ethyl acetate (EtOAc) and hexanes (1:1) as eluent. M.p.: 53-56° C. 1H NMR (CDCl3, 400 MHz): δ 6.99-6.90 (m, 2H), 4.83 (s, 2H), 3.80 (s, 3H), 3.39 (q, J=7.2 Hz, 2H), 3.26 (q, J=7.2 Hz, 2H), 1.24 (t, J=7.2 Hz, 3H), 1.14 (t, J=7.2 Hz, 3H). MS (ESI): m/z 244.13 (M+H)+.

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Following general procedure A, methyl hydrogen fumarate (MHF) (0.39 g, 3.00 mmol) dissolved in NMP was reacted at ca. 55° C. with 2-chloro-N,N-diethylacetamide (0.44 g, 3.00 mmol) in the presence of CsHCO3 (0.69 g, 3.60 mmol) to afford 0.37 g (51% yield) of the title compound (1) after purification by silica gel column chromatography (Biotage) using a mixture of ethyl acetate (EtOAc) and hexanes (1:1) as eluent. M.p.: 53-56° C. 1H NMR (CDCl3, 400 MHz): δ 6.99-6.90 (m, 2H), 4.83 (s, 2H), 3.80 (s, 3H), 3.39 (q, J=7.2 Hz, 2H), 3.26 (q, J=7.2 Hz, 2H), 1.24 (t, J=7.2 Hz, 3H), 1.14 (t, J=7.2 Hz, 3H). MS (ESI): m/z 244.13 (M+H)+.

反应条件: temp:15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: At a temperature of about 50-70° C., under a nitrogen atmosphere, a slurry of mono-methyl fumarate (130 g), toluene (800 mL) and N,N-diethylchloroacetamide (157 g) is added to triethylamine (1.07 g). The temperature is adjusted to 85-95° C. and maintained there for 4 hours. Then the temperature is then adjusted to 15-25° C. and the mixture is subjected to vigorous agitation. After 30 minutes of vigorous agitation in 200 mL of water, the agitation is stopped and the phases are allowed to separate for 30 minutes. The upper organic phase is washed with additional deionized water (75 mL) with vigorous agitation for 30 minutes. The agitation is then stopped and the phases are allowed to separate for 30 minutes. The organic layer is dried over anhydrous sodium sulfate (25 g) for 2 hours. The reaction is filtered and the solution is cooled to 10-20° C. Heptane (1600 mL), at −5 to −20° C. is added over 5 minutes. The reaction is cooled to −5° C. to −10° C. for 24 to 48 hours. The resulting product is air dried for 12 hours. XRPD analysis confirms product is form 4. is adjusted to 85-95° C. maintained there for 4 hours is then adjusted to 15-25° C. to separate for 30 minutes The upper organic phase is washed with additional deionized water (75 mL) with vigorous agitation for 30 minutes to separate for 30 minutes The organic layer is dried over anhydrous sodium sulfate (25 g) for 2 hours The reaction is filtered Heptane (1600 mL), at −5 to −20° C. is added over 5 minutes The reaction is cooled to −5° C. to −10° C. for 24 to 48 hours dried for 12 hours