methyl (3S)-3-hydroxytetradecanoate

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

Procedure: Pyridinium p-toluenesulfonate (90 mg) was added to a solution of methyl (S)-3-hydroxytetradecanoate (VIII, 10.32 g, 40 mmol) in 2-methoxypropen (40 mL). After stirring for 20 min at room temperature the reaction mixture was diluted with diethyl ether (30 mL) and extracted first with a saturated aqueous solution of sodium hydrogen carbonate (3 mL) and then with water (2×2 mL). The combined organic phases were dried (Na2SO4) and concentrated under reduced pressure. The residual colorless oil (13.20 g, 99%) was used in the next step without further purification. [α]25D +10.01 (c=0.5 in hexane); 1H NMR (DMSO-D6) δ 0.86 (t, J=7 Hz, 3H), 1.24-1.27 (m, 26H), 1.44-1.46 (m, 2H), 3.09 (s, 3H), 3.58 (s, 3H), 4.03-4.05 (m, 1H); 13C NMR (DMSO-D6) δ 13.85, 22.02, 22.05, 24.26, 24.86, 28.67, 28.91, 28.97, 28.98, 29.03, 30.93, 31.27, 35.13, 40.21, 48.46, 51.15, 67.67, 100.35, 171.62. Anal. Calcd for C19H38O4 : C, 69.05; H, 11.59. Found: C, 69.00; H, 11.63. extracted first with a saturated aqueous solution of sodium hydrogen carbonate (3 mL) The combined organic phases were dried (Na2SO4) concentrated under reduced pressure The residual colorless oil (13.20 g, 99%) was used in the next step without further purification

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

Procedure: 12.9 g of methyl (S)-3-hydroxytetradecanoate are dissolved in 50 ml of DMF under argon 9.0 g of t-butyldimethylchlorosilane are added thereto, 8.5 g of imidazole are then added portionwise and the mixture is left to stir for 17 hours. The reaction mixture is poured into 300 ml of water and extracted three times with 50 ml of diethyl ether. The combined organic phases are dried, filtered and evaporated. By distillation at 140°-145° C./0.07 mm there is obtained methyl (S)-3-(t-butyldimethylsiloxy)tetradecanoate as a colourless oil. are added the mixture is left extracted three times with 50 ml of diethyl ether The combined organic phases are dried filtered evaporated By distillation at 140°-145° C./0.07 mm there

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

Procedure: Pyridinium p-toluenesulfonate (90 mg) was added to a solution of methyl (S)-3-hydroxytetradecanoate (VIII, 10.32 g, 40 mmol) in 2-methoxypropen (40 mL). After stirring for 20 min at room temperature the reaction mixture was diluted with diethyl ether (30 mL) and extracted first with a saturated aqueous solution of sodium hydrogen carbonate (3 mL) and then with water (2×2 mL). The combined organic phases were dried (Na2SO4) and concentrated under reduced pressure. The residual colorless oil (13.20 g, 99%) was used in the next step without further purification. [α]25D +10.01 (c=0.5 in hexane); 1H NMR (DMSO-D6) δ 0.86 (t, J=7 Hz, 3H), 1.24-1.27 (m, 26H), 1.44-1.46 (m, 2H), 3.09 (s, 3H), 3.58 (s, 3H), 4.03-4.05 (m, 1H); 13C NMR (DMSO-D6) δ 13.85, 22.02, 22.05, 24.26, 24.86, 28.67, 28.91, 28.97, 28.98, 29.03, 30.93, 31.27, 35.13, 40.21, 48.46, 51.15, 67.67, 100.35, 171.62. Anal. Calcd for C19H38O4 : C, 69.05; H, 11.59. Found: C, 69.00; H, 11.63. extracted first with a saturated aqueous solution of sodium hydrogen carbonate (3 mL) The combined organic phases were dried (Na2SO4) concentrated under reduced pressure The residual colorless oil (13.20 g, 99%) was used in the next step without further purification

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

Procedure: 12.9 g of methyl (S)-3-hydroxytetradecanoate are dissolved in 50 ml of DMF under argon 9.0 g of t-butyldimethylchlorosilane are added thereto, 8.5 g of imidazole are then added portionwise and the mixture is left to stir for 17 hours. The reaction mixture is poured into 300 ml of water and extracted three times with 50 ml of diethyl ether. The combined organic phases are dried, filtered and evaporated. By distillation at 140°-145° C./0.07 mm there is obtained methyl (S)-3-(t-butyldimethylsiloxy)tetradecanoate as a colourless oil. are added the mixture is left extracted three times with 50 ml of diethyl ether The combined organic phases are dried filtered evaporated By distillation at 140°-145° C./0.07 mm there