2-(2-methoxyethoxy)ethanethioamide

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-(2-methoxyethoxyl)ethanethioamide (Example 6B, 3.26 g, 21.85 mmol) in ethanol (60 mL) was added dropwise ethylbromopyruvate (3.7 mL, 29.5 mmol) and the mixture was refluxed for 18 hours. The reaction was then concentrated under vacuum, diluted with ethyl acetate, washed with water (1×), brine (1×), dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified by silica gel column chromatography (3.5×10 cm, 30% ethyl acetate/CH2Cl2) to give the title material (4.36 g, 81%) as an oil. LC (Method F): 1.791 min. 1H NMR (CDCl3, 400 MHz) δ ppm: 8.16 (s, 1H), 4.87 (s, 2H), 4.41 (q, J=7.10 Hz, 2H), 3.74-3.77 (m, 2H), 3.57-3.60 (m, 2H), 3.39 (s, 3H), 1.39 (t, J=7.10 Hz, 3H). the mixture was refluxed for 18 hours The reaction was then concentrated under vacuum diluted with ethyl acetate washed with water (1×), brine (1×) dried over anhydrous magnesium sulfate filtered concentrated The residue was purified by silica gel column chromatography (3.5×10 cm, 30% ethyl acetate/CH2Cl2)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 2-(2-methoxyethoxyl)acetamide (Example 6A, 3.39 g, 25.5 mmol) in THF (40 mL) was treated with Lawesson's reagent (6.55 g, 16.19 mmol) and the reaction was refluxed for 18 hours. The reaction was then allowed to cool down to RT and was concentrated under vacuum, diluted with ethyl acetate, washed with sat. NaHCO3 (1×) and brine (1×). The aqueous phases were extracted with ethyl acetate (2×200 mL) and the organic extracts were dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified by silica gel chromatography (3.5×11 cm, 30% AcOEt/CH2Cl2) to give the title material (3.26 g, 86%) as a yellow oil. 1H NMR (CDCl3, 400 MHz) δ ppm: 8.58 (very broad s, 1H), 7.50 (very broad s, 1H), 4.36 (s, 2H), 3.66-3.69 (m, 2H), 3.53-3.56 (m, 2H), 3.39 (s, 3H). the reaction was refluxed for 18 hours was concentrated under vacuum diluted with ethyl acetate washed with sat. NaHCO3 (1×) and brine (1×) The aqueous phases were extracted with ethyl acetate (2×200 mL) the organic extracts were dried over anhydrous magnesium sulfate filtered concentrated The residue was purified by silica gel chromatography (3.5×11 cm, 30% AcOEt/CH2Cl2)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-(2-methoxyethoxy)ethanethioamide (Example 6B, 3.26 g, 21.85 mmol) in ethanol (60 mL) was added dropwise ethylbromopyruvate (3.7 mL, 29.5 mmol) and the mixture was refluxed for 18 hours. The reaction was then concentrated under vacuum, diluted with ethyl acetate, washed with water (1×), brine (1×), dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified by silica gel column chromatography (3.5×10 cm, 30% ethyl acetate/CH2Cl2) to give the title material (4.36 g, 81%) as an oil. LC (Method F): 1.791 min. 1H NMR (CDCl3, 400 MHz) δ ppm: 8.16 (s, 1H), 4.87 (s, 2H), 4.41 (q, J=7.10 Hz, 2H), 3.74-3.77 (m, 2H), 3.57-3.60 (m, 2H), 3.39 (s, 3H), 1.39 (t, J=7.10 Hz, 3H). the mixture was refluxed for 18 hours The reaction was then concentrated under vacuum diluted with ethyl acetate washed with water (1×), brine (1×) dried over anhydrous magnesium sulfate filtered concentrated The residue was purified by silica gel column chromatography (3.5×10 cm, 30% ethyl acetate/CH2Cl2)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 2-(2-methoxyethoxy)acetamide (Example 6A, 3.39 g, 25.5 mmol) in THF (40 mL) was treated with Lawesson's reagent (6.55 g, 16.19 mmol) and the reaction was refluxed for 18 hours. The reaction was then allowed to cool down to RT and was concentrated under vacuum, diluted with ethyl acetate, washed with sat. NaHCO3 (1×) and brine (1×). The aqueous phases were extracted with ethyl acetate (2×200 mL) and the organic extracts were dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified by silica gel chromatography (3.5×11 cm, 30% AcOEt/CH2Cl2) to give the title material (3.26 g, 86%) as a yellow oil. 1H NMR (CDCl3, 400 MHz) δ ppm: 8.58 (very broad s, 1H), 7.50 (very broad s, 1H), 4.36 (s, 2H), 3.66-3.69 (m, 2H), 3.53-3.56 (m, 2H), 3.39 (s, 3H). the reaction was refluxed for 18 hours was concentrated under vacuum diluted with ethyl acetate washed with sat. NaHCO3 (1×) and brine (1×) The aqueous phases were extracted with ethyl acetate (2×200 mL) the organic extracts were dried over anhydrous magnesium sulfate filtered concentrated The residue was purified by silica gel chromatography (3.5×11 cm, 30% AcOEt/CH2Cl2)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-(2-methoxyethoxyl)ethanethioamide (Example 6B, 3.26 g, 21.85 mmol) in ethanol (60 mL) was added dropwise ethylbromopyruvate (3.7 mL, 29.5 mmol) and the mixture was refluxed for 18 hours. The reaction was then concentrated under vacuum, diluted with ethyl acetate, washed with water (1×), brine (1×), dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified by silica gel column chromatography (3.5×10 cm, 30% ethyl acetate/CH2Cl2) to give the title material (4.36 g, 81%) as an oil. LC (Method F): 1.791 min. 1H NMR (CDCl3, 400 MHz) δ ppm: 8.16 (s, 1H), 4.87 (s, 2H), 4.41 (q, J=7.10 Hz, 2H), 3.74-3.77 (m, 2H), 3.57-3.60 (m, 2H), 3.39 (s, 3H), 1.39 (t, J=7.10 Hz, 3H). the mixture was refluxed for 18 hours The reaction was then concentrated under vacuum diluted with ethyl acetate washed with water (1×), brine (1×) dried over anhydrous magnesium sulfate filtered concentrated The residue was purified by silica gel column chromatography (3.5×10 cm, 30% ethyl acetate/CH2Cl2)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 2-(2-methoxyethoxyl)acetamide (Example 6A, 3.39 g, 25.5 mmol) in THF (40 mL) was treated with Lawesson's reagent (6.55 g, 16.19 mmol) and the reaction was refluxed for 18 hours. The reaction was then allowed to cool down to RT and was concentrated under vacuum, diluted with ethyl acetate, washed with sat. NaHCO3 (1×) and brine (1×). The aqueous phases were extracted with ethyl acetate (2×200 mL) and the organic extracts were dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified by silica gel chromatography (3.5×11 cm, 30% AcOEt/CH2Cl2) to give the title material (3.26 g, 86%) as a yellow oil. 1H NMR (CDCl3, 400 MHz) δ ppm: 8.58 (very broad s, 1H), 7.50 (very broad s, 1H), 4.36 (s, 2H), 3.66-3.69 (m, 2H), 3.53-3.56 (m, 2H), 3.39 (s, 3H). the reaction was refluxed for 18 hours was concentrated under vacuum diluted with ethyl acetate washed with sat. NaHCO3 (1×) and brine (1×) The aqueous phases were extracted with ethyl acetate (2×200 mL) the organic extracts were dried over anhydrous magnesium sulfate filtered concentrated The residue was purified by silica gel chromatography (3.5×11 cm, 30% AcOEt/CH2Cl2)