乙基 3-(4-氯苯基)-2-氧代丙酸乙酯

反应条件: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of Example 52A (4.75 g, 21.0 mmol) and phenyl hydrazine (2.07 mL, 21.0 mmol) was treated with concentrated sulfuric acid (5 drops), heated to 120° C. for 15 minutes, cooled to room temperature, treated with ethanol (25 mL), treated with bubbling HCl gas for 2 minutes, and heated to reflux for 1 hour. The mixture was poured into water (30 mL) and extracted with diethyl ether. The combined extracts were washed with water and brine, dried (MgSO4), filtered, and concentrated. The concentrate was recrystallized from ethanol to provide 750 mg (12%) of the desired product. cooled to room temperature heated to reflux for 1 hour extracted with diethyl ether The combined extracts were washed with water and brine dried (MgSO4) filtered concentrated The concentrate was recrystallized from ethanol

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

实验步骤: The title compound was prepared as described for C4 using ethyl 3-(4-chlorophenyl)-2-oxopropanoate B7 (100 mg, 0.441 mmol), sodium hydride (11.65 mg, 0.485 mmol) and 2,3,4,6 tetra-O-acetyl-α-D-glucose bromide (181 mg, 0.441 mmol). The resulting compound was isolated in the form of white solid in 22% yield. The resulting compound was isolated in the form of white solid in 22% yield

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

实验步骤: This was prepared as described for C4 using ethyl 3-(4-chlorophenyl)-2-oxopropanoate B7 (100 mg, 0.441 mmol), sodium hydride (11.65 mg, 0.485 mmol) and 2,3,4,6-tetra-O-acetyl-α-D-galactose bromide (181 mg, 0.441 mmol). The resulting compound was isolated in the form of white solid in 66% yield. This was prepared The resulting compound was isolated in the form of white solid in 66% yield

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

实验步骤: The title compound was prepared as described for B4 using 4-chlorobenzyl chloride (1.250 g, 7.76 mmol), magnesium (0.208 g, 8.54 mmol) and diethyl oxalate (2.269 g, 15.53 mmol). The product was isolated in the form of colorless oil in 74% yield and used instantly in next step. The product was isolated in the form of colorless oil in 74% yield

反应条件: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of Example 52A (4.75 g, 21.0 mmol) and phenyl hydrazine (2.07 mL, 21.0 mmol) was treated with concentrated sulfuric acid (5 drops), heated to 120° C. for 15 minutes, cooled to room temperature, treated with ethanol (25 mL), treated with bubbling HCl gas for 2 minutes, and heated to reflux for 1 hour. The mixture was poured into water (30 mL) and extracted with diethyl ether. The combined extracts were washed with water and brine, dried (MgSO4), filtered, and concentrated. The concentrate was recrystallized from ethanol to provide 750 mg (12%) of the desired product. cooled to room temperature heated to reflux for 1 hour extracted with diethyl ether The combined extracts were washed with water and brine dried (MgSO4) filtered concentrated The concentrate was recrystallized from ethanol