3-methoxypropyl methanesulfonate

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

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

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

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

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

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

Procedure: tert-butyl 3-(3-chlorophenyl)-3-hydroxypropyl(isopropyl)carbamate was obtained using procedures analogous to Preparation A, Steps 1-6, using isopropylamine in Step 1 and NaBH4 in Step 6. To a 0° C. solution of tert-butyl 3-(3-chlorophenyl)-3-hydroxypropyl(isopropyl)carbamate (158 mg, 0.48 mmol) in THF (5 mL) was added NaH (60 mg, 1.45 mmol) and the reaction was allowed to stir for 5 minutes. 3-methoxypropyl methanesulfonate (810 mg, 4.8 mmol) was then added and the reaction was heated to reflux for 2.5 hrs. After cooling to room temperature, the reaction was quenched with saturated ammonium chloride solution at 0° C. The aqueous layer was extracted with EtOAc (2×). The combined organic layers were dried over MgSO4, filtered, evaporated and purified via ISCO to afford tert-butyl 3-(3-chlorophenyl)-3-(3-methoxypropoxy)propyl(isopropyl)carbamate. MS ESI+ve m/z 422 (M+Na). analogous to Preparation A, Steps 1-6 the reaction was heated to reflux for 2.5 hrs the reaction was quenched with saturated ammonium chloride solution at 0° C The aqueous layer was extracted with EtOAc (2×) The combined organic layers were dried over MgSO4 filtered evaporated purified via ISCO

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

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: An oven dried flask was charged with (R)-tert-butyl 3-((R)-hydroxy(phenyl)-methyl)piperidine-1-carboxylate (162 mg, 0.557 mmol) and 60% NaH in mineral oil (112 mg, 5 equiv.). The flask was purged with N2 gas, cooled to 0° C. and anhydrous THF (6 mL) was added slowly. After 5 min, the reaction mixture was allowed to warn to rt slowly. A solution of 3-methoxypropyl methanesulfonate (468 mg, 4 equiv.) in anhydrous THF (5 mL) was added. The mixture was heated at reflux for 4 h. LC-MS indicated the reaction was complete. The reaction mixture was cooled to 0° C. and water was added dropwise. After separation, the aqueous layer was extracted with ether (3×). The combined organic layers were washed with 5% aq HCl, satd aq NaHCO3 and brine, and dried over Na2SO4. After concentration, the crude product was purified by flash chromatography on a 4-g silica gel cartridge eluted with a 0-35% EtOAc in hexanes gradient to afford (R)-tert-butyl 3-((R)-(3-methoxypropoxy)(phenyl)-methyl)piperidine-1-carboxylate (196 mg, 97% yield) as a clear oil. LC-MS (3 min) tR=2.19 min, m/z 386 (M+Na). An oven dried flask The flask was purged with N2 gas anhydrous THF (6 mL) was added slowly to warn to rt The mixture was heated at reflux for 4 h The reaction mixture was cooled to 0° C. After separation the aqueous layer was extracted with ether (3×) The combined organic layers were washed with 5% aq HCl dried over Na2SO4 After concentration the crude product was purified by flash chromatography on a 4-g silica gel cartridge eluted with a 0-35% EtOAc in hexanes gradient

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: An oven dried flask was charged with (R)-tert-butyl 3-((R)-hydroxy(phenyl)-methyl)piperidine-1-carboxylate (162 mg, 0.557 mmol) and 60% NaH in mineral oil (112 mg, 5 equiv.). The flask was purged with N2 gas, cooled to 0° C. and anhydrous THF (6 mL) was added slowly. After 5 min, the reaction mixture was allowed to warn to rt slowly. A solution of 3-methoxypropyl methanesulfonate (468 mg, 4 equiv.) in anhydrous THF (5 mL) was added. The mixture was heated at reflux for 4 h. LC-MS indicated the reaction was complete. The reaction mixture was cooled to 0° C. and water was added dropwise. After separation, the aqueous layer was extracted with ether (3×). The combined organic layers were washed with 5% aq HCl, satd aq NaHCO3 and brine, and dried over Na2SO4. After concentration, the crude product was purified by flash chromatography on a 4-g silica gel cartridge eluted with a 0-35% EtOAc in hexanes gradient to afford (R)-tert-butyl 3-((R)-(3-methoxypropoxy)(phenyl)-methyl)piperidine-1-carboxylate (196 mg, 97% yield) as a clear oil. LC-MS (3 min) tR=2.19 min, m/z 386 (M+Na). An oven dried flask The flask was purged with N2 gas anhydrous THF (6 mL) was added slowly to warn to rt The mixture was heated at reflux for 4 h The reaction mixture was cooled to 0° C. After separation the aqueous layer was extracted with ether (3×) The combined organic layers were washed with 5% aq HCl dried over Na2SO4 After concentration the crude product was purified by flash chromatography on a 4-g silica gel cartridge eluted with a 0-35% EtOAc in hexanes gradient

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Potassium carbonate (2.8 g, 20 mmol) was added to a solution of 3-methoxypropan-1-yl methansulphonate (Method 73; 3.25 g, 19.3 mmol) and 4-bromothiophenol (3.48 g, 18.4 mmol) in DMF (30 ml) and the mixture heated at 40° C. for 4 hours. The mixture was allowed to cool to ambient temperature, poured into water (100 ml) and extracted with EtOAc (2×50 ml). The extracts were combined, washed with saturated aqueous sodium hydrogen carbonate solution (50 ml) and brine (2×50 ml), dried (Chemelut column CE1010) and the volatiles removed by evaporation. The residue was dissolved in MeOH (150 ml) and water (30 ml) and oxone (13.4 g, 21.6 mmol) was added in portions. The mixture was stirred at ambient temperature for 18 hours. The MeOH was evaporated, water (50 ml) added and the solution extracted with DCM (3×50 ml). The extracts were combined, washed with brine (50 ml), dried (Chemelut column CE1010), and evaporated. The residue was purified by flash chromatography on silica gel eluting with iso-hexane:EtOAc (100:0 increasing in polarity to 90:10) to give the title compound (3.32 g, 62%) as a colourless oil. NMR 1.95 (m, 2), 3.19 (m, 2H), 3.26 (s, 3H), 3.41 (t, 2H), 7.70 (d, 2H), 7.78 (d, 2H). to cool to ambient temperature extracted with EtOAc (2×50 ml) washed with saturated aqueous sodium hydrogen carbonate solution (50 ml) and brine (2×50 ml) dried (Chemelut column CE1010) the volatiles removed by evaporation The residue was dissolved in MeOH (150 ml) The MeOH was evaporated water (50 ml) added the solution extracted with DCM (3×50 ml) washed with brine (50 ml) dried (Chemelut column CE1010) evaporated The residue was purified by flash chromatography on silica gel eluting with iso-hexane:EtOAc (100:0 increasing in polarity to 90:10)

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

Procedure: Methanesulphonyl chloride (1.75 ml, 22 mmol) was added to a solution of 3-methoxy-1-propanol (1.81 g, 20 mmol) and triethylamine (3.35 ml, 24 mmol) in DCM (40 ml) cooled in an ice bath and the mixture stirred at ambient temperature for 18 hours. DCM (25 ml) and water (50 ml) were added and the phases separated and the aqueous layer was extracted with DCM (25 ml). The extracts were combined, washed with water (50 ml) and brine (50 ml), dried (Chemelut column CE1010) and evaporated to give the title compound 3.25 g (97%) as a pale yellow oil. NMR 2.00 (m, 2H), 3.01 (s, 3H), 3.35 (s, 3H), 3.49 (t, 2H), 4.38 (t, 2H). cooled in an ice bath the phases separated the aqueous layer was extracted with DCM (25 ml) washed with water (50 ml) and brine (50 ml) dried (Chemelut column CE1010) evaporated

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

Procedure: Alkylation of 3-hydroxybenzaldehyde (11) with methanesulfonic acid 3-methoxypropyl ester following the method used in Example 34 except that the reaction solvent was DMF gave 3-(3-methoxypropoxy)benzaldehyde as a clear oil. Yield (1.32 g, 55%): 1H NMR (400 MHz, CDCl3) δ 9.97 (s, 1H), 7.40-7.47 (m, 3H), 7.15-7.20 (m, 1H), 4.12 (t, J=6.4 Hz, 2H), 3.56 (t, J=6.2 Hz, 2H), 3.35 (s, 3H), 2.05-2.11 (m, 2H).