Ethyl-2,2-difluoro-2-(3,5-difluorophenyl)acetate

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: A solution of ethyl 3,5-difluorophenyl-α,α-difluoroacetate (from Example D24 below; 1 molar eq.) in 50% aqueous ethanol was treated with lithium hydroxide (1.5 molar eq.). The solution was stirred for 3 hours at ambient temperature then concentrated via rotary evaporation. The residue was taken up in water; a small amount of I N NaOH was added to make basic. The aqueous mixture was extracted with ether. The aqueous layer was acidified to pH 3 with 1 N HCl. The acid was extracted thrice with methylene chloride. The combined methylene chloride extracts were dried over Na2SO4, filtered, and concentrated. then concentrated via rotary evaporation a small amount of I N NaOH was added The aqueous mixture was extracted with ether The acid was extracted thrice with methylene chloride The combined methylene chloride extracts were dried over Na2SO4 filtered concentrated

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

实验步骤: A solution of ethyl 3,5-difluorophenyl-α,α-difluoroacetate (from Example D24 below; 1 molar eq.) in 50% aqueous ethanol was treated with lithium hydroxide (1.5 molar eq.). The solution was stirred for 3 hours at ambient temperature then concentrated via rotary evaporation. The residue was taken up in water; a small amount of 1 N NaOH was added to make basic. The aqueous mixture was extracted with ether. The aqueous layer was acidified to pH 3 with 1 N HCl. The acid was extracted thrice with methylene chloride. The combined methylene chloride extracts were dried over Na2SO4, filtered, and concentrated. then concentrated via rotary evaporation a small amount of 1 N NaOH was added The aqueous mixture was extracted with ether The acid was extracted thrice with methylene chloride The combined methylene chloride extracts were dried over Na2SO4 filtered concentrated

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

实验步骤: A solution of ethyl 3,5-difluorophenyl-α,α-difluoroacetate (from Example D24 below; 1 molar eq.) in 50% aqueous ethanol was treated with lithium hydroxide (1.5 molar eq.). The solution was stirred for 3 hours at ambient temperature then concentrated via rotary evaporation. The residue was taken up in water; a small amount of 1 N NaOH was added to make basic. The aqueous mixture was extracted with ether. The aqueous layer was acidified to pH 3 with 1 N HCl. The acid was extracted thrice with methylene chloride. The combined methylene chloride extracts were dried over Na2SO4, filtered, and concentrated. then concentrated via rotary evaporation a small amount of 1 N NaOH was added The aqueous mixture was extracted with ether The acid was extracted thrice with methylene chloride The combined methylene chloride extracts were dried over Na2SO4 filtered concentrated

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

实验步骤: A solution of ethyl 3,5-difluorophenyl-α,α-difluoroacetate (from Example D24 below; 1 molar eq.) in 50% aqueous ethanol was treated with lithium hydroxide (1.5 molar eq.). The solution was stirred for 3 hours at ambient temperature then concentrated via rotary evaporation. The residue was taken up in water; a small amount of 1 N NaOH was added to make basic. The aqueous mixture was extracted with ether. The aqueous layer was acidified to pH 3 with 1 N HCl. The acid was extracted thrice with methylene chloride. The combined methylene chloride extracts were dried over Na2SO4, filtered, and concentrated. then concentrated via rotary evaporation a small amount of 1 N NaOH was added The aqueous mixture was extracted with ether The acid was extracted thrice with methylene chloride The combined methylene chloride extracts were dried over Na2SO4 filtered concentrated

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

实验步骤: A solution of ethyl 3,5-difluorophenyl-α,α-difluoroacetate (from Example D24 below; 1 molar eq.) in 50% aqueous ethanol was treated with lithium hydroxide (1.5 molar eq.). The solution was stirred for 3 hours at ambient temperature then concentrated via rotary evaporation. The residue was taken up in water; a small amount of 1 N NaOH was added to make basic. The aqueous mixture was extracted with ether. The aqueous layer was acidified to pH 3 with 1 N HCl. The acid was extracted thrice with methylene chloride. The combined methylene chloride extracts were dried over Na2SO4, filtered, and concentrated. then concentrated via rotary evaporation a small amount of 1 N NaOH was added The aqueous mixture was extracted with ether The acid was extracted thrice with methylene chloride The combined methylene chloride extracts were dried over Na2SO4 filtered concentrated

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

实验步骤: A solution of ethyl 3,5-difluorophenyl-α,α-difluoroacetate (from Example D24 below; 1 molar eq.) in 50% aqueous ethanol was treated with lithium hydroxide (1.5 molar eq.). The solution was stirred for 3 hours at ambient temperature then concentrated via rotary evaporation. The residue was taken up in water; a small amount of I N NaOH was added to make basic. The aqueous mixture was extracted with ether. The aqueous layer was acidified to pH 3 with 1 N HCl. The acid was extracted thrice with methylene chloride. The combined methylene chloride extracts were dried over Na2SO4, filtered, and concentrated. then concentrated via rotary evaporation a small amount of I N NaOH was added The aqueous mixture was extracted with ether The acid was extracted thrice with methylene chloride The combined methylene chloride extracts were dried over Na2SO4 filtered concentrated

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

实验步骤: A solution of ethyl 3,5-difluorophenyl-α,α-difluoroacetate (from Example D24 below; 1 molar eq.) in 50% aqueous ethanol was treated with lithium hydroxide (1.5 molar eq.). The solution was stirred for 3 hours at ambient temperature then concentrated via rotary evaporation. The residue was taken up in water; a small amount of I N NaOH was added to make basic. The aqueous mixture was extracted with ether. The aqueous layer was acidified to pH 3 with 1 N HCl. The acid was extracted thrice with methylene chloride. The combined methylene chloride extracts were dried over Na2SO4, filtered, and concentrated. then concentrated via rotary evaporation a small amount of I N NaOH was added The aqueous mixture was extracted with ether The acid was extracted thrice with methylene chloride The combined methylene chloride extracts were dried over Na2SO4 filtered concentrated

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: A solution of ethyl 3,5-difluorophenyl-α,α-difluoroacetate (from Example D24 below; 1 molar eq.) in 50% aqueous ethanol was treated with lithium hydroxide (1.5 molar eq.). The solution was stirred for 3 hours at ambient temperature then concentrated via rotary evaporation. The residue was taken up in water; a small amount of 1 N NaOH was added to make basic. The aqueous mixture was extracted with ether. The aqueous layer was acidified to pH 3 with 1 N HCl. The acid was extracted thrice with methylene chloride. The combined methylene chloride extracts were dried over Na2SO4, filtered, and concentrated. then concentrated via rotary evaporation a small amount of 1 N NaOH was added The aqueous mixture was extracted with ether The acid was extracted thrice with methylene chloride The combined methylene chloride extracts were dried over Na2SO4 filtered concentrated

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

实验步骤: A solution of ethyl 3,5-difluorophenyl-α,α-difluoroacetate (from Example D24 below; 1 molar eq.) in 50% aqueous ethanol was treated with lithium hydroxide (1.5 molar eq.). The solution was stirred for 3 hours at ambient temperature then concentrated via rotary evaporation. The residue was taken up in water; a small amount of 1 N NaOH was added to make basic. The aqueous mixture was extracted with ether. The aqueous layer was acidified to pH 3 with 1 N HCl. The acid was extracted thrice with methylene chloride. The combined methylene chloride extracts were dried over Na2SO4, filtered, and concentrated. then concentrated via rotary evaporation a small amount of 1 N NaOH was added The aqueous mixture was extracted with ether The acid was extracted thrice with methylene chloride The combined methylene chloride extracts were dried over Na2SO4 filtered concentrated

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

实验步骤: A solution of ethyl 3,5-difluorophenyl-α,α-difluoroacetate (from Example D24 below; 1 molar eq.) in 50% aqueous ethanol was treated with lithium hydroxide (1.5 molar eq.). The solution was stirred for 3 hours at ambient temperature then concentrated via rotary evaporation. The residue was taken up in water; a small amount of 1 N NaOH was added to make basic. The aqueous mixture was extracted with ether. The aqueous layer was acidified to pH 3 with 1 N HCl. The acid was extracted thrice with methylene chloride. The combined methylene chloride extracts were dried over Na2SO4, filtered, and concentrated. then concentrated via rotary evaporation a small amount of 1 N NaOH was added The aqueous mixture was extracted with ether The acid was extracted thrice with methylene chloride The combined methylene chloride extracts were dried over Na2SO4 filtered concentrated