methyl 2-[4-(hydroxymethyl)phenyl]acetate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To methyl 2-(4-(hydroxymethyl)phenyl)acetate (E132) in CH2Cl2 at 0° C. was added 2,6-lutidine and TIPS-OTf. The ice bath was removed and the solution was allowed to warm to room temperature and stir. After 4 h the solution was poured into NH4Cl(sat) and CH2Cl2 and the organic layer was further extracted with NH4Cl(sat). The organics were dried (MgSO4) filtered and evaporated. Column chromatography (SiO2, 0-15% EtOAc/Hexanes) gave pure methyl 2-(4-((triisopropylsilyloxy)methyl)phenyl)acetate (E133). The ice bath was removed After 4 h the solution was poured into NH4Cl(sat) and CH2Cl2 the organic layer was further extracted with NH4Cl(sat) The organics were dried (MgSO4) filtered evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 2-(4-(hydroxymethyl)phenyl)acetic acid in MeOH at 0° C. was added TMS-CHN2. The solution was stirred for 3 h then quenched with a few drops of AcOH. The solvents were evaporated. Column chromatography (SiO2, 3-15% EtOAc/Hex) gave pure methyl 2-(4-(hydroxymethyl)phenyl)acetate (E132). then quenched with a few drops of AcOH The solvents were evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 2-(4-(hydroxymethyl)phenyl)acetic acid in MeOH at 0° C. was added TMS-CHN2. The solution was stirred for 3 h then quenched with a few drops of AcOH. The solvents were evaporated. Column chromatography (SiO2, 3-15% EtOAc/Hex) gave pure methyl 2-(4-(hydroxymethyl)phenyl)acetate (E132). then quenched with a few drops of AcOH The solvents were evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To methyl 2-(4-(hydroxymethyl)phenyl)acetate (E132) in CH2Cl2 at 0° C. was added 2,6-lutidine and TIPS-OTf. The ice bath was removed and the solution was allowed to warm to room temperature and stir. After 4 h the solution was poured into NH4Cl(sat) and CH2Cl2 and the organic layer was further extracted with NH4Cl(sat). The organics were dried (MgSO4) filtered and evaporated. Column chromatography (SiO2, 0-15% EtOAc/Hexanes) gave pure methyl 2-(4-((triisopropylsilyloxy)methyl)phenyl)acetate (E133). The ice bath was removed After 4 h the solution was poured into NH4Cl(sat) and CH2Cl2 the organic layer was further extracted with NH4Cl(sat) The organics were dried (MgSO4) filtered evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 2-(4-(hydroxymethyl)phenyl)acetic acid in MeOH at 0° C. was added TMS-CHN2. The solution was stirred for 3 h then quenched with a few drops of AcOH. The solvents were evaporated. Column chromatography (SiO2, 3-15% EtOAc/Hex) gave pure methyl 2-(4-(hydroxymethyl)phenyl)acetate (E132). then quenched with a few drops of AcOH The solvents were evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirring solution of Dess-Martin Periodinane (1.5 eq) in dichloromethane (0.3 M) at room temperature under nitrogen was added a solution of 29 in dichloromethane (0.2 M). After 4 hours the reaction was diluted with ether (0.1 M). The reaction mixture was then poured into a solution of sodium thiosulfate (10.5 eq) in saturated sodium bicarbonate (0.5 M) and stirred for 30 minutes. The phases were separated and the organic phase was washed with saturated sodium bicarbonate (1×), H2O (1×) and brine (1×) then dried over sodium sulfate, filtered and concentrated in vacuo to afford the product. (94%) 1H NMR (400 MHz, CDCl3) δ 10.00 (s, 1H), 7.86 (d, 2H), 7.46 (d, 2H), 3.72 (m, 5H). The phases were separated the organic phase was washed with saturated sodium bicarbonate (1×), H2O (1×) and brine (1×) then dried over sodium sulfate filtered concentrated in vacuo to afford the product

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirring solution of 15 in dioxane (0.4 M) at room temperature under nitrogen was added calcium carbonate (5.5 eq) and H2O (0.8 M). The reaction was refluxed overnight then vacuum filtered. The dioxane was removed under reduced pressure. The reaction mixture was diluted with H2O then extracted with dichloromethane (3×). The organic phases were combined, dried over sodium sulfate, filtered and concentrated in vacuo to afford the product. (77%) 1H NMR (400 MHz, CDCl3) δ 7.33 (d, 2H), 7.27 (d, 2H), 4.67 (s, 2H), 3.69 (s, 3H), 3.63 (s, 2H), 1.78 (br s, 1H). The reaction was refluxed overnight vacuum filtered The dioxane was removed under reduced pressure The reaction mixture was diluted with H2O then extracted with dichloromethane (3×) dried over sodium sulfate filtered concentrated in vacuo to afford the product

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of methyl p-hydroxymethylphenylacetate (3.30 g, 18.3 mmol, prepared according to the method of G. Biagi et al., E. Ed. Farmaco., 43, 597 (1988)) in 6.6 ml DMF was added TBDMS-Cl (3.31 g, 22.0 mmol) and imidazole (3.12 g, 45.8 mmol), and the resulting solution was stirred at ambient temperature for 18 hours. The mixture was poured into 100 ml H2O and extracted (EtOAc, 4×50 ml). The combined extracts were dried (MgSO4), filtered and concentrated. The crude material was chromatographed (EtOAc:hexane, 5:95) to afford the title compound (5.0 g, 92% yield) as an oil. extracted (EtOAc, 4×50 ml) The combined extracts were dried (MgSO4) filtered concentrated The crude material was chromatographed (EtOAc:hexane, 5:95)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To methyl 2-(4-(hydroxymethyl)phenyl)acetate (E132) in CH2Cl2 at 0° C. was added 2,6-lutidine and TIPS-OTf. The ice bath was removed and the solution was allowed to warm to room temperature and stir. After 4 h the solution was poured into NH4Cl(sat) and CH2Cl2 and the organic layer was further extracted with NH4Cl(sat). The organics were dried (MgSO4) filtered and evaporated. Column chromatography (SiO2, 0-15% EtOAc/Hexanes) gave pure methyl 2-(4-((triisopropylsilyloxy)methyl)phenyl)acetate (E133). The ice bath was removed After 4 h the solution was poured into NH4Cl(sat) and CH2Cl2 the organic layer was further extracted with NH4Cl(sat) The organics were dried (MgSO4) filtered evaporated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 2-(4-(hydroxymethyl)phenyl)acetic acid in MeOH at 0° C. was added TMS-CHN2. The solution was stirred for 3 h then quenched with a few drops of AcOH. The solvents were evaporated. Column chromatography (SiO2, 3-15% EtOAc/Hex) gave pure methyl 2-(4-(hydroxymethyl)phenyl)acetate (E132). then quenched with a few drops of AcOH The solvents were evaporated