Butanal, 4-[(tetrahydro-2H-pyran-2-yl)oxy]-

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a refluxing mixture of 1.26 g of magnesium turnings, 15.5 ml of 1-chlorohexadecane, and 100 ml of anhydrous diethyl ether were added 0.5 ml of a 3.2M solution of methylmagnesium bromide in diethyl ether and 0.05 ml of ethyl bromide. The reaction mixture was refluxed for a period of 6 hours. A solution of 3.0 g of 4-[(tetrahydro-2H-pyran-2-yl)oxy]butanal in 10 ml of diethyl ether was added, and the reaction mixture refluxed for an additional hour. The reaction mixture was poured into a mixture of ice and a saturated aqueous solution of ammonium chloride, and filtered. Upon standing the filtrate separated into organic and inorganic phases. The organic phase was dried over anhydrous sodium sulfate and concentrated to an oil. Flash chromatography of the oil utilizing 25% diethyl ether/petroleum ether yielded 4.8 g (70%) of 1-[(tetrahydro-2H-pyran-2-yl)oxy]eicosan-4-ol as a solid, mp 39°-43°. The reaction mixture was refluxed for a period of 6 hours the reaction mixture refluxed for an additional hour The reaction mixture was poured into a mixture of ice a saturated aqueous solution of ammonium chloride, and filtered separated into organic and inorganic phases The organic phase was dried over anhydrous sodium sulfate concentrated to an oil

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a refluxing mixture of 1.26 g of magnesium turnings, 15.5 ml of 1-chlorohexadecane, and 100 ml of anhydrous diethyl ether were added 0.5 ml of a 3.2 M solution of methylmagnesium bromide in diethyl ether and 0.05 ml of ethyl bromide. The reaction mixture was refluxed for a period of 6 hours. A solution of 3.0 g of 4-[(tetrahydro-2H-pyran-2-yl)oxy]butanal in 10 ml of diethyl ether was added, and the reaction mixture refluxed for an additional hour. The reaction mixture was poured into a mixture of ice and a saturated aqueous solution of ammonium chloride, and filtered. Upon standing the filtrate separated into organic and inorganic phases. The organic phase was dried over anhydrous sodium sulfate and concentrated to an oil. Flash chromatography of the oil utilizing 25% diethyl ether/petroleum ether yielded 4.8 g (70%) of 1-[(tetrahydro-2H-pyran-2-yl)oxy]eicosan-4-ol as a solid, mp 39-43°. The reaction mixture was refluxed for a period of 6 hours the reaction mixture refluxed for an additional hour The reaction mixture was poured into a mixture of ice a saturated aqueous solution of ammonium chloride, and filtered separated into organic and inorganic phases The organic phase was dried over anhydrous sodium sulfate concentrated to an oil

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: In an argon atmosphere, butyllithium (10%; 37 ml) was added dropwise to a suspension of (4-chlorobenzyl)triphenylphosphonium chloride (24 g) in tetrahydrofuran (70 ml) with ice-cooling and stirring. After stirring at the same temperature for 30 minutes, a solution of 4-tetrahydropyranyloxy-1-butanal (9 g) in tetrahydrofuran (30 ml) was added dropwise, and the mixture was stirred at room temperature for 2 hours. The tetrahydrofuran was distilled off under reduced pressure and water was added to the residue, followed by extraction with petroleum ether. After washing with water and drying over magnesium sulfate, the solvent was distilled off, and the residue was subjected to silica gel column chromatography, elution being carried out with chloroform to give 1-(4-chlorophenyl)-5-(2-tetrahydropyranyloxy)-1-pentene (7 g) as a light-yellow oil. cooling After stirring at the same temperature for 30 minutes the mixture was stirred at room temperature for 2 hours The tetrahydrofuran was distilled off under reduced pressure and water was added to the residue followed by extraction with petroleum ether After washing with water drying over magnesium sulfate the solvent was distilled off the residue was subjected to silica gel column chromatography, elution

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a refluxing mixture of 1.26 g of magnesium turnings, 15.5 ml of 1-chlorohexadecane, and 100 ml of anhydrous diethyl ether were added 0.5 ml of a 3.2M solution of methylmagnesium bromide in diethyl ether and 0.05 ml of ethyl bromide. The reaction mixture was refluxed for a period of 6 hours. A solution of 3.0 g of 4-[(tetrahydro-2H-pyran-2-yl)oxy]butanal in 10 ml of diethyl ether was added, and the reaction mixture refluxed for an additional hour. The reaction mixture was poured into a mixture of ice and a saturated aqueous solution of ammonium chloride, and filtered. Upon standing the filtrate separated into organic and inorganic phases. The organic phase was dried over anhydrous sodium sulfate and concentrated to an oil. Flash chromatography of the oil utilizing 25% diethyl ether/petroleum ether yielded 4.8 g (70%) of 1-[(tetrahydro-2H-pyran-2-yl)oxy]eicosan-4-ol as a solid, mp 39°-43°. The reaction mixture was refluxed for a period of 6 hours the reaction mixture refluxed for an additional hour The reaction mixture was poured into a mixture of ice a saturated aqueous solution of ammonium chloride, and filtered separated into organic and inorganic phases The organic phase was dried over anhydrous sodium sulfate concentrated to an oil