3-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]propanoic acid

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To tert-butyl 2,5,8,11-tetraoxatetradecan-14-oate (65 g, 222.6 mmol) (example-1), was added p-toluenesulfonic acid (21.16 g, 111 mmol) and water (31.7 mL). The contents were heated to 80° C. and stirred at that temperature for 2 h. The completion of the reaction was monitor by TLC. The reaction mixture was cooled to 0° C. and basified to pH 10 to 11 using sodium hydroxide solution (17.7 g dissolved in 65 mL water). The contents were stirred at 25-30° C. for 10 minutes. Added Ethyl acetate (65 mL×2), stirred and separated the layer. The aqueous layer was cooled to 0 to 5° C. and the pH was adjusted to 3.5 to 4 using 11 N HCl solution and the product was extracted to methylene chloride (120 ml×2). The combined organic layer was washed with water, brine solution and dried over sodium sulphate. The solvent was removed under vacuum to afford 2,5,8,11-tetraoxatetradecan-14-oic acid (40.5 g, 77.1%). The reaction mixture was cooled to 0° C. and basified to pH 10 to 11 The contents were stirred at 25-30° C. for 10 minutes separated the layer The aqueous layer was cooled to 0 to 5° C. the product was extracted to methylene chloride (120 ml×2) The combined organic layer was washed with water, brine solution dried over sodium sulphate The solvent was removed under vacuum

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To tert-butyl 2,5,8,11-tetraoxatetradecan-14-oate (65 g, 222.6 mmol) (example-1), was added p-toluenesulfonic acid (21.16 g, 111 mmol) and water (31.7 mL). The contents were heated to 80° C. and stirred at that temperature for 2 h. The completion of the reaction was monitor by TLC. The reaction mixture was cooled to 0° C. and basified to pH 10 to 11 using sodium hydroxide solution (17.7 g dissolved in 65 mL water). The contents were stirred at 25-30° C. for 10 minutes. Added Ethyl acetate (65 mL×2), stirred and separated the layer. The aqueous layer was cooled to 0 to 5° C. and the pH was adjusted to 3.5 to 4 using 11 N HCl solution and the product was extracted to methylene chloride (120 ml×2). The combined organic layer was washed with water, brine solution and dried over sodium sulphate. The solvent was removed under vacuum to afford 2,5,8,11-tetraoxatetradecan-14-oic acid (40.5 g, 77.1%). The reaction mixture was cooled to 0° C. and basified to pH 10 to 11 The contents were stirred at 25-30° C. for 10 minutes separated the layer The aqueous layer was cooled to 0 to 5° C. the product was extracted to methylene chloride (120 ml×2) The combined organic layer was washed with water, brine solution dried over sodium sulphate The solvent was removed under vacuum

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To tert-butyl 2,5,8,11-tetraoxatetradecan-14-oate (65 g, 222.6 mmol) (example-1), was added p-toluenesulfonic acid (21.16 g, 111 mmol) and water (31.7 mL). The contents were heated to 80° C. and stirred at that temperature for 2 h. The completion of the reaction was monitor by TLC. The reaction mixture was cooled to 0° C. and basified to pH 10 to 11 using sodium hydroxide solution (17.7 g dissolved in 65 mL water). The contents were stirred at 25-30° C. for 10 minutes. Added Ethyl acetate (65 mL×2), stirred and separated the layer. The aqueous layer was cooled to 0 to 5° C. and the pH was adjusted to 3.5 to 4 using 11 N HCl solution and the product was extracted to methylene chloride (120 ml×2). The combined organic layer was washed with water, brine solution and dried over sodium sulphate. The solvent was removed under vacuum to afford 2,5,8,11-tetraoxatetradecan-14-oic acid (40.5 g, 77.1%). The reaction mixture was cooled to 0° C. and basified to pH 10 to 11 The contents were stirred at 25-30° C. for 10 minutes separated the layer The aqueous layer was cooled to 0 to 5° C. the product was extracted to methylene chloride (120 ml×2) The combined organic layer was washed with water, brine solution dried over sodium sulphate The solvent was removed under vacuum