4-[tert-butyl(dimethyl)silyl]oxyphenol

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: A solution of 2.9 parts of imidazole, 1.99 parts of hydroquinone and 3 parts of tert-butyldimethylsilyl chloride in 10 mL of dimetylformamide was stirred at room temperature for 1 hr 45 min. The reaction was monitored by TLC showed formation of product. The reaction mixture was diluted with 50 mL of deionized water and product was extracted with 2×50 mL of ether. The combined organic layer was dried over anhydrous Na2SO4 and filtered. The filtrate was concentrated under reduced pressure and purified by column chromatography on silica gel with 5% ethyl acetate-hexanes to yield 2.24 parts 4-(tert-butyldimethylsilyloxy)phenol. NMR was used to confirm the following structure. was extracted with 2×50 mL of ether The combined organic layer was dried over anhydrous Na2SO4 filtered The filtrate was concentrated under reduced pressure purified by column chromatography on silica gel with 5% ethyl acetate-hexanes

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

Procedure: 4′-{[4-(trans-4-Hydroxycyclohexyl)-5-oxo-7-propyl-4,5-dihydro[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]methyl}biphenyl-2-carbonitrile (0.46 g), 4-{[tert-butyl(dimethyl)silyl]oxy}phenol (0.49 g) and triphenylphosphine (0.29 g) were dissolved in tetrahydrofuran (2 mL), a solution of diisopropyl azodicarboxylate (0.58 mL, 1.9 M toluene solution) in tetrahydrofuran (1 mL) was added dropwise at 0° C., and the mixture was stirred at room temperature for 45 hr. The reaction mixture was added to 1 M hydrochloric acid, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography to give the title compound as an oily compound (0.31 g, 47%). the mixture was extracted with ethyl acetate The organic layer was washed with saturated brine dried over anhydrous magnesium sulfate The solvent was evaporated under reduced pressure the residue was purified by silica gel column chromatography

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

Procedure: 4′-{[4-(trans-4-Hydroxycyclohexyl)-5-oxo-7-propyl-4,5-dihydro[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]methyl}biphenyl-2-carbonitrile (0.46 g), 4-{[tert-butyl(dimethyl)silyl]oxy}phenol (0.49 g) and triphenylphosphine (0.29 g) were dissolved in tetrahydrofuran (2 mL), a solution of diisopropyl azodicarboxylate (0.58 mL, 1.9 M toluene solution) in tetrahydrofuran (1 mL) was added dropwise at 0° C., and the mixture was stirred at room temperature for 45 hr. The reaction mixture was added to 1 M hydrochloric acid, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography to give the title compound as an oily compound (0.31 g, 47%). the mixture was extracted with ethyl acetate The organic layer was washed with saturated brine dried over anhydrous magnesium sulfate The solvent was evaporated under reduced pressure the residue was purified by silica gel column chromatography

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

Procedure: 4′-{[4-(cis-4-Hydroxycyclohexyl)-5-oxo-7-propyl-4,5-dihydro[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]methyl}biphenyl-2-carbonitrile (0.46 g), 4-{[tert-butyl(dimethyl)silyl]oxy}phenol (0.49 g) and triphenylphosphine (0.29 g) were dissolved in tetrahydrofuran (2 mL), a solution of diisopropyl azodicarboxylate (0.58 mL, 1.9 M toluene solution) in tetrahydrofuran (1 mL) was added dropwise at 0° C., and the mixture was stirred at room temperature for 45 hr. The reaction mixture was added to 1 M hydrochloric acid, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography to give the title compound as an oily compound (0.22 g, 33%). the mixture was extracted with ethyl acetate The organic layer was washed with saturated brine dried over anhydrous magnesium sulfate The solvent was evaporated under reduced pressure the residue was purified by silica gel column chromatography

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

Procedure: A solution of 2.9 parts of imidazole, 1.99 parts of hydroquinone and 3 parts of tert-butyldimethylsilyl chloride in 10 mL of dimethylformamide was stirred at room temperature for 1 hr 45 min. The reaction was monitored by TLC showed formation of product. The reaction mixture was diluted with 50 mL of deionized water and product was extracted with 2×50 mL of ether. The combined organic layer was dried over anhydrous Na2SO4 and filtered. The filtrate was concentrated under reduced pressure and purified by column chromatography on silica gel with 5% ethyl acetate-hexanes to yield 2.24 parts 4-(tert-butyldimethylsilyloxy)phenol. NMR was used to confirm the following structure. was extracted with 2×50 mL of ether The combined organic layer was dried over anhydrous Na2SO4 filtered The filtrate was concentrated under reduced pressure purified by column chromatography on silica gel with 5% ethyl acetate-hexanes

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

Procedure: Synthesis followed SP3a, using 4.1 mmol 4-(tert-Butyl-dimethyl-silanyloxy)-phenol and racemic epibromohydrine to give the title compound upon purification by Flash Master Personal (20 g silica gel cartridge, PE to PE/ethyl acetate 15:1) with 21% yield. Synthesis

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

Procedure: 4-Hydroxyphenyl benzoate (9.0 mmol) was dissolved in CH2Cl2 (9 mL/mmol), TBDMS-Cl (1.5 eq., 13.5 mmol) and imidazole (2.0 eq., 18.0 mmol) were added and the mixture was stirred at r.t. overnight. The mixture was diluted with MeOH (4.5 mL/mmol), and NaBH4 (2.5 eq., 22.5 mmol) was added slowly over 5 min (attention: vigorous gas evolution). The mixture was concentrated by removing CH2Cl2 under reduced pressure and the suspension was heated to 65° C. for 15 h. was added slowly over 5 min (attention: vigorous gas evolution) The mixture was concentrated by removing CH2Cl2 under reduced pressure the suspension was heated to 65° C. for 15 h.

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

Procedure: Synthesis followed SP3a, using 4.1 mmol 4-(tert-Butyl-dimethyl-silanyloxy)-phenol and racemic epibromohydrine to give the title compound upon purification by Flash Master Personal (20 g silica gel cartridge, PE to PE/ethyl acetate 15:1) with 21% yield. Synthesis

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

Procedure: 4-Hydroxyphenyl benzoate (9.0 mmol) was dissolved in CH2Cl2 (9 mL/mmol), TBDMS-Cl (1.5 eq., 13.5 mmol) and imidazole (2.0 eq., 18.0 mmol) were added and the mixture was stirred at r.t. overnight. The mixture was diluted with MeOH (4.5 mL/mmol), and NaBH4 (2.5 eq., 22.5 mmol) was added slowly over 5 min (attention: vigorous gas evolution). The mixture was concentrated by removing CH2Cl2 under reduced pressure and the suspension was heated to 65° C. for 15 h. was added slowly over 5 min (attention: vigorous gas evolution) The mixture was concentrated by removing CH2Cl2 under reduced pressure the suspension was heated to 65° C. for 15 h.