2-(Met hoxymethylene)-3-methoxypropanenitrile(10). A"LParr reactor was charged with 63.4 g (1.17 mol) of freshly prepared NaOMe and 350 mL of anhydrous toluene. The mixture was cooled to ca. 10 "C and was treated with 94.5 g (1.11mol) of 3-methoqpropanenitrilefollowed by 67.0 g (1.11mol) of methyl formate. The mixture was heated to 50 "C under 50 atm of carbon monoxide for 19 h, cooled to rmm temperature, and flushed with
Ar. The solid was collected by filtration, washed with some toluene, and transferred to a 1-L, three-necked, round- bottomed flask equipped with a mechanical stirrer, condenser, and ther-mometer. Toluene (400mt)was added followed by 110 mL (146.5 g, 1.16 mol) of dimethyl sulfate. The mixture was stirred at 50 "C for 15 h, cooled to room temperature, and treated with 20.8 mL of EhN. Stirring was continued for 30 min, and the mixture was diluted with 200 mL of brine. The organic phase was col-lected, and the aqueous phase was reextracted with 150 mL of toluene. The combined extracts were dried (CaClZ)and evapo-rated to give 152.8 g of crude 10 as a pale yellow oil, which was distilled through a 1 -ft X 1-in. Vigreux column to give 112.7 g (80%)of 10 (3:2 mixture of E/Zisomers) as a colorless oil, bp 78-81 "C (0.15 Torr): UV (EtOH) 230 nm (e = 13750);IR 2220, 1648, 1450 cm-'; 'H NMR 6 3.05 3.06 (3 H, s), 3.70/3.71 (3 H, s), 3.82 (2 H, s), 6.75/6.85 (1 H, s); % NMR 6 56.98/57.46 (OCHS), 61.78/62.0 (OCH3), 64.22/68.61 (CH2), 87.02/89.58 (8, spzC), 116.10/118.20 (CN); MS m/z 127 (18, M'), 96 (100). 'H NMR of the crude product indicated the presence of ca 10% of 11, which was removed by distillation, bp 40-42 "C (0.15 Torr): 'H NMR
6 3.35 (6 H, s), 4.90 (1 H, br s), 6.18 (2 H, s).
2-(Met hoxymethylene)-3-methoxypropanenitrile(10). A"LParr reactor was charged with 63.4 g (1.17 mol) of freshly prepared NaOMe and 350 mL of anhydrous toluene. The mixture was cooled to ca. 10 "C and was treated with 94.5 g (1.11mol) of 3-methoqpropanenitrilefollowed by 67.0 g (1.11mol) of methyl formate. The mixture was heated to 50 "C under 50 atm of carbon monoxide for 19 h, cooled to rmm temperature, and flushed with
Ar. The solid was collected by filtration, washed with some toluene, and transferred to a 1-L, three-necked, round- bottomed flask equipped with a mechanical stirrer, condenser, and ther-mometer. Toluene (400mt)was added followed by 110 mL (146.5 g, 1.16 mol) of dimethyl sulfate. The mixture was stirred at 50 "C for 15 h, cooled to room temperature, and treated with 20.8 mL of EhN. Stirring was continued for 30 min, and the mixture was diluted with 200 mL of brine. The organic phase was col-lected, and the aqueous phase was reextracted with 150 mL of toluene. The combined extracts were dried (CaClZ)and evapo-rated to give 152.8 g of crude 10 as a pale yellow oil, which was distilled through a 1 -ft X 1-in. Vigreux column to give 112.7 g (80%)of 10 (3:2 mixture of E/Zisomers) as a colorless oil, bp 78-81 "C (0.15 Torr): UV (EtOH) 230 nm (e = 13750);IR 2220, 1648, 1450 cm-'; 'H NMR 6 3.05 3.06 (3 H, s), 3.70/3.71 (3 H, s), 3.82 (2 H, s), 6.75/6.85 (1 H, s); % NMR 6 56.98/57.46 (OCHS), 61.78/62.0 (OCH3), 64.22/68.61 (CH2), 87.02/89.58 (8, spzC), 116.10/118.20 (CN); MS m/z 127 (18, M'), 96 (100). 'H NMR of the crude product indicated the presence of ca 10% of 11, which was removed by distillation, bp 40-42 "C (0.15 Torr): 'H NMR
6 3.35 (6 H, s), 4.90 (1 H, br s), 6.18 (2 H, s).
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