methyl 12-hydroxydodecanoate

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:22.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 12-Hydroxydodecanoic acid (10.82 g, 50 mmol) was added to 3% HCl in CH3OH (210 ml). The reaction was stirred at 22° C. for 3.5 hours and concentrated on a rotary evaporator. The residue was taken up in ethyl acetate (200 ml) and washed with 1M K2CO3 (2×150 ml), and once with saturated aqueous NaCl (150 ml), dried over Na2SO4, concentrated and vacuum distilled to yield 10.3 g of methyl 12-hydroxydodecanoate in 90% yield; mp 33.5-35.0° C., 1H NMR (CDCl3) delta 3.66 (s, 3H), 3.62 (t, 2H), 2.88 (t, 2H), 1.28 (br s, 18H). concentrated on a rotary evaporator washed with 1M K2CO3 (2×150 ml) once with saturated aqueous NaCl (150 ml), dried over Na2SO4 concentrated vacuum distilled

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

Procedure: The synthesis procedure of 15a was followed. Trityl chloride (1412 mg, 5.1 mmol), 14c (583 mg, 2.5 mmol), and pyridine (10 mL) were used and the reaction was prolonged to 3 days. The filtration step was omitted, instead the crude material was purified by flash column chromatography (10% EtOAc in hexanes) yielding 477 mg (40%) of a pale yellow oil 15c. 1H-NMR (400 MHz, CDCl3, δH ppm): 7.44 (6H, m, p-Ar), 7.28 (6H, m, m-Ar), 7.21 (3H, m, o-Ar), 3.66 (3H, s, CO2CH3), 3.03 (2H, t, 3JH—H=6.6 Hz, H)—CH2), 2.29 (2H, t, 3JH—H=7.5 Hz, CH2CO2), 1.55-1.65 (4H, m, 2CH2), 1.10-1.39 (14H, m, 7CH2). HRMS (EI): m/z calcd 472.2977 (C32H40O3), found 472.2968 [M]+. The filtration step instead the crude material was purified by flash column chromatography (10% EtOAc in hexanes)

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

Procedure: The synthesis procedure of 15a was followed. Trityl chloride (1412 mg, 5.1 mmol), 14c (583 mg, 2.5 mmol), and pyridine (10 mL) were used and the reaction was prolonged to 3 days. The filtration step was omitted, instead the crude material was purified by flash column chromatography (10% EtOAc in hexanes) yielding 477 mg (40%) of a pale yellow oil 15c. 1H-NMR (400 MHz, CDCl3, δH ppm): 7.44 (6H, m, p-Ar), 7.28 (6H, m, m-Ar), 7.21 (3H, m, o-Ar), 3.66 (3H, s, CO2CH3), 3.03 (2H, t, 3JH—H=6.6 Hz, H)—CH2), 2.29 (2H, t, 3JH—H=7.5 Hz, CH2CO2), 1.55-1.65 (4H, m, 2CH2), 1.10-1.39 (14H, m, 7CH2). HRMS (EI): m/z calcd 472.2977 (C32H40O3), found 472.2968 [M]+. The filtration step instead the crude material was purified by flash column chromatography (10% EtOAc in hexanes)

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

Procedure: Concentrated H2SO4 (0.2 mL) was added to a solution of oxacyclotridecan-2-one (850 mg, 4.3 mmol) in 20 mL of methanol and stirred for 1 day. Methanol was removed under reduced pressure and the aqueous residue was extracted with diethyl ether 3 times. The combined organic layers were washed with saturated NaHCO3, saturated NaCl, and then dried over MgSO4. The diethyl ether was removed under reduced pressure to yield 874 mg (88%) of 14c as a white solid. 1H-NMR (400 MHz, CDCl3, δH ppm): 3.65 (3H, s, CO2CH3), 3.63 (2H, t, 3JH—H=6.6 Hz, HO—CH2), 2.29 (2H, t, 3JH—H=7.6 Hz, CH2CO2), 1.50-1.66 (4H, m, 2CH2), 1.22-1.38 (14H, m, 7CH2). HRMS (EI): m/z calcd 231.1955 ([M+H]+, C13H27O3), found 231.1954 [M+H]+. Methanol was removed under reduced pressure the aqueous residue was extracted with diethyl ether 3 times The combined organic layers were washed with saturated NaHCO3, saturated NaCl dried over MgSO4 The diethyl ether was removed under reduced pressure

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

Procedure: Concentrated H2SO4 (0.2 mL) was added to a solution of oxacyclotridecan-2-one (850 mg, 4.3 mmol) in 20 mL of methanol and stirred for 1 day. Methanol was removed under reduced pressure and the aqueous residue was extracted with diethyl ether 3 times. The combined organic layers were washed with saturated NaHCO3, saturated NaCl, and then dried over MgSO4. The diethyl ether was removed under reduced pressure to yield 874 mg (88%) of 14c as a white solid. 1H-NMR (400 MHz, CDCl3, δH ppm): 3.65 (3H, s, CO2CH3), 3.63 (2H, t, 3JH—H=6.6 Hz, HO—CH2), 2.29 (2H, t, 3JH—H=7.6 Hz, CH2CO2), 1.50-1.66 (4H, m, 2CH2), 1.22-1.38 (14H, m, 7CH2). HRMS (EI): m/z calcd 231.1955 ([M+H]+, C13H27O3), found 231.1954 [M+H]+. Methanol was removed under reduced pressure the aqueous residue was extracted with diethyl ether 3 times The combined organic layers were washed with saturated NaHCO3, saturated NaCl dried over MgSO4 The diethyl ether was removed under reduced pressure

Conditions: temp:22.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 12-Hydroxydodecanoic acid (10.82 g, 50 mmol) was added to 3% HCl in CH3OH (210 ml). The reaction was stirred at 22° C. for 3.5 hours and concentrated on a rotary evaporator. The residue was taken up in ethyl acetate (200 ml) and washed with 1M K2CO3 (2×150 ml), and once with saturated aqueous NaCl (150 ml), dried over Na2SO4, concentrated and vacuum distilled to yield 10.3 g of methyl 12-hydroxydodecanoate in 90% yield; mp 33.5-35.0° C., 1H NMR (CDCl3) delta 3.66 (s, 3H), 3.62 (t, 2H), 2.88 (t, 2H), 1.28 (br s, 18H). concentrated on a rotary evaporator washed with 1M K2CO3 (2×150 ml) once with saturated aqueous NaCl (150 ml), dried over Na2SO4 concentrated vacuum distilled

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

Procedure: A 100-ml two-necked flask equipped with a stirrer and dropping funnel was charged with 9.39 g (104 mmol) of 1,3-diamino-2-propanol and 0.047 g (0.87 mmol) of sodium methoxide. While heating and stirring the contents at 80° C. in an N2 atmosphere, a THF solution of 4.00 g (17.4 mmol) of methyl 12-hydroxydodecanate was added dropwise over 2.5 hours. Precipitate formed was washed with water and recrystallized from ethyl acetate-methanol (4:1 v/v), thereby obtaining 3.80 g (yield: 75%) of the title compound (IIh-12) as colorless powder. A 100-ml two-necked flask equipped with a stirrer While heating Precipitate formed was washed with water recrystallized from ethyl acetate-methanol (4:1 v/v)

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: A 100-ml two-necked flask equipped with a stirrer and dropping funnel was charged with 9.39 g (104 mmol) of 1,3-diamino-2-propanol and 0.047 g (0.87 mmol) of sodium methoxide. While heating and stirring the contents at 80° C. in an N2 atmosphere, a THF solution of 4.00 g (17.4 mmol) of methyl 12-hydroxydodecanate was added dropwise over 2.5 hours. Precipitate formed was washed with water and recrystallized from ethyl acetate-methanol (4:1 v/v), thereby obtaining 3.80 g (yield: 75%) of the title compound (IIh-12) as colorless powder. A 100-ml two-necked flask equipped with a stirrer While heating Precipitate formed was washed with water recrystallized from ethyl acetate-methanol (4:1 v/v)

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

Procedure: The synthesis procedure of 15a was followed. Trityl chloride (1412 mg, 5.1 mmol), 14c (583 mg, 2.5 mmol), and pyridine (10 mL) were used and the reaction was prolonged to 3 days. The filtration step was omitted, instead the crude material was purified by flash column chromatography (10% EtOAc in hexanes) yielding 477 mg (40%) of a pale yellow oil 15c. 1H-NMR (400 MHz, CDCl3, δH ppm): 7.44 (6H, m, p-Ar), 7.28 (6H, m, m-Ar), 7.21 (3H, m, o-Ar), 3.66 (3H, s, CO2CH3), 3.03 (2H, t, 3JH—H=6.6 Hz, H)—CH2), 2.29 (2H, t, 3JH—H=7.5 Hz, CH2CO2), 1.55-1.65 (4H, m, 2CH2), 1.10-1.39 (14H, m, 7CH2). HRMS (EI): m/z calcd 472.2977 (C32H40O3), found 472.2968 [M]+. The filtration step instead the crude material was purified by flash column chromatography (10% EtOAc in hexanes)

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

Procedure: A 100-ml two-necked flask equipped with a stirrer and dropping funnel was charged with 9.39 g (104 mmol) of 1,3-diamino-2-propanol and 0.047 g (0.87 mmol) of sodium methoxide. While heating and stirring the contents at 80° C. in an N2 atmosphere, a THF solution of 4.00 g (17.4 mmol) of methyl 12-hydroxydodecanate was added dropwise over 2.5 hours. Precipitate formed was washed with water and recrystallized from ethyl acetate-methanol (4:1 v/v), thereby obtaining 3.80 g (yield: 75%) of the title compound (IIh-12) as colorless powder. A 100-ml two-necked flask equipped with a stirrer While heating Precipitate formed was washed with water recrystallized from ethyl acetate-methanol (4:1 v/v)