(3-氯-2,2-二甲基-3-氧代丙基) 乙酸甲酯

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: A benzene solution (25 ml) of crude 3-acetoxy-2,2-dimethyl proprionic acid from Example 3(a) (7.4 g, 46.5 mmol), oxalyl chloride (6.45 g, 51 ml) and DMF (2 drops) was stirred at ambient temperature for 3 hours. The pale yellow solution was distilled to provide the title compound as a colorless liquid, b.p.15 85°-88° C. NMR (CDCl3) δ 4.18 (2 H, s), 2.08 (3 H, s), 1.35 (6 H, s). The pale yellow solution was distilled

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

实验步骤: A benzene solution (25 ml) of crude 3-acetoxy-2,2-dimethyl propionic acid from Example 3(a) (7.4 g, 46.5 mmol), oxalyl chloride (6.45 g, 51 ml) and DMF (2 drops) was stirred at ambient temperature for 3 hours. The pale yellow solution was distilled to provide the title compound as a colorless liquid, b.p.15 85°-88° C. NMR (CDCl3) δ4.18 (2H, s), 2.08 (3H, s), 1.35 (6H, s). The pale yellow solution was distilled

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

实验步骤: A benzene solution (25 ml) of crude 3-acetoxy-2,2-dimethyl propionic acid from Example 3(a) (7.4 g, 46.5 mmol), oxalyl chloride (6.45 g, 51 ml) and DMF (2 drops) was stirred at ambient temperature for 3 hours. The pale yellow solution was distilled to provide the title compound as a colorless liquid, b.p.15 85°-88° C. NMR (CDCl3) δ4.18 (2H, s), 2.08 (3H, s), 1.35 (6H, s). The pale yellow solution was distilled

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

实验步骤: A benzene solution (25 ml) of crude 3-acetoxy-2,2-dimethyl propionic acid from Example 3(a) (7.4 g, 46.5 mmol), oxalyl chloride (6.45 g, 51 ml) and DMF (2 drops) was stirred at ambient temperature for 3 hours. The pale yellow solution was distilled to provide the title compound as a colorless liquid, b.p.15 85°-88° C. NMR (CDCl3) δ4.18 (2H, s), 2.08 (3H, s), 1.35 (6H, s). The pale yellow solution was distilled

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The product of Step A, 2,2-dimethyl-3-acetyloxypropionic acid (11.76 g, 80 mmol) was dissolved in benzene (100 mL), and the reaction solution was cooled to 0° C., and then oxalyl chloride (15.0 g, 120 mmol) was slowly added dropwise. After 3 hours, the solvent was removed in vacuo, and the reaction mixture was distilled in vacuo to give the title compound. the solvent was removed in vacuo the reaction mixture was distilled in vacuo

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

实验步骤: A benzene solution (25 ml) of crude 3-acetoxy-2,2-dimethyl proprionic acid from Example 3(a) (7.4 g, 46.5 mmol), oxalyl chloride (6.45 g, 51 ml) and DMF (2 drops) was stirred at ambient temperature for 3 hours. The pale yellow solution was distilled to provide the title compound as a colorless liquid, b.p.15 85°-88° C. NMR (CDCl3) δ 4.18 (2 H, s), 2.08 (3 H, s), 1.35 (6 H, s). The pale yellow solution was distilled

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The product of Step A, 2,2-dimethyl-3-acetyloxypropionic acid (11.76 g, 80 mmol) was dissolved in benzene (100 mL), and the reaction solution was cooled to 0° C., and then oxalyl chloride (15.0 g, 120 mmol) was slowly added dropwise. After 3 hours, the solvent was removed in vacuo, and the reaction mixture was distilled in vacuo to give the title compound. the solvent was removed in vacuo the reaction mixture was distilled in vacuo

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

实验步骤: The title compound, a white solid, MS: m/e=363.2 (M+H+), can be prepared in accordance with the general method of example 39, step 1 from 2-amino-5-iodopyridine and acetic acid 2-chlorocarbonyl-2-methyl-propyl ester (example 40, step 2).