1-[butoxy(chloro)phosphoryl]oxybutane

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 di-n-butyl chlorophosphate (130.3 g, 0.57 mole) in 600 mL of dichloromethane containing 55.37 g (0.70 mole) of pyridine was cooled to 0° C. Isobutanol (42.25 g, 0.57 mole) was added dropwise over 1 hour. The formation of a white precipitate was immediately observed. The reaction mixture was then stirred for 24 hours at room temperature. The pyridinium hydrochloride was filtered off, and the solution was washed with water (2×250 mL), aqueous 0.5 N HCl (2×250 mL) and water (25×250 mL). The organic phase was dried over anhydrous magnesium sulfate for 12 hours. Filtration of the drying agent, followed by the removal of the solvent using a Roto-vap, yielded di-n-butyl isobutyl phosphate as a clear colorless liquid. Distillation of the crude product (68° C. at 0.02 torr) gave 125 g of 94.8% di-n-butyl isobutyl phosphate (DBIBP). The pyridinium hydrochloride was filtered off the solution was washed with water (2×250 mL), aqueous 0.5 N HCl (2×250 mL) and water (25×250 mL) The organic phase was dried over anhydrous magnesium sulfate for 12 hours Filtration of the drying agent followed by the removal of the solvent

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

Procedure: Dibutylphosphorochloridate (3.74 g) was added to a solution of 2-(di-n-butyl methylsilyl)-ethanol (3 g) and pyridine (1.04 g) in carbon tetrachloride (10 ml). The mixture was left overnight, filtered, and the filtrate passed through an alumina column (20 g), eluting with a further 3 × 20 ml of carbon tetrachloride. Removal of the solvent under vacuum left the phosphate as a colourless oil (2.7 g). filtered eluting with a further 3 × 20 ml of carbon tetrachloride Removal of the solvent under vacuum left the phosphate as a colourless oil (2.7 g)

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

Procedure: Analogously to Example 1, 200 g of dibutoxyphosphinic acid chloride were reacted with 58 g of sodium cyanate in 350 ml of absolute acetonitrile. 142 g of a faintly yellowish liquid (69% of theory) having a boiling point of 80°-83° C./0.67 Pa were isolated. were isolated

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

Procedure: A solution of di-n-butyl chlorophosphate (130.3 g, 0.57 mole) in 600 mL of dichloromethane containing 55.37 g (0.70 mole) of pyridine was cooled to 0° C. Isobutanol (42.25 g, 0.57 mole) was added dropwise over 1 hour. The formation of a white precipitate was immediately observed. The reaction mixture was then stirred for 24 hours at room temperature. The pyridinium hydrochloride was filtered off, and the solution was washed with water (2×250 mL), aqueous 0.5 N HCl (2×250 mL) and water (25×250 mL). The organic phase was dried over anhydrous magnesium sulfate for 12 hours. Filtration of the drying agent, followed by the removal of the solvent using a Roto-vap, yielded di-n-butyl isobutyl phosphate as a clear colorless liquid. Distillation of the crude product (68° C. at 0.02 torr) gave 125 g of 94.8% di-n-butyl isobutyl phosphate (DBIBP). The pyridinium hydrochloride was filtered off the solution was washed with water (2×250 mL), aqueous 0.5 N HCl (2×250 mL) and water (25×250 mL) The organic phase was dried over anhydrous magnesium sulfate for 12 hours Filtration of the drying agent followed by the removal of the solvent

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

Procedure: A solution of di-n-butyl chlorophosphate (130.3 g, 0.57 mole) in 600 mL of dichloromethane containing 55.37 g (0.70 mole) of pyridine was cooled to 0° C. Isobutanol (42.25 g, 0.57 mole) was added dropwise over 1 hour. The formation of a white precipitate was immediately observed. The reaction mixture was then stirred for 24 hours at room temperature. The pyridinium hydrochloride was filtered off, and the solution was washed with water (2×250 mL), aqueous 0.5 N HCl (2×250 mL) and water (25×250 mL). The organic phase was dried over anhydrous magnesium sulfate for 12 hours. Filtration of the drying agent, followed by the removal of the solvent using a Roto-vap, yielded di-n-butyl isobutyl phosphate as a clear colorless liquid. Distillation of the crude product (68° C. at 0.02 torr) gave 125 g of 94.8% di-n-butyl isobutyl phosphate (DBIBP). The pyridinium hydrochloride was filtered off the solution was washed with water (2×250 mL), aqueous 0.5 N HCl (2×250 mL) and water (25×250 mL) The organic phase was dried over anhydrous magnesium sulfate for 12 hours Filtration of the drying agent followed by the removal of the solvent