乙基 5-氧代-5-苯基戊酸甲酯

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: The expected acid is obtained in the form of a white solid with a yield of 11% by following a procedure analogous to Example 1 and starting from 4-chlorophenylhydrazine and ethyl δ-oxobenzenepentanoate.

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

实验步骤: A mixture of ethyl 5-oxo-5-phenylpentanoate (8.00 g), hydroxylamine hydrochloride (3.03 g), sodium acetate (4.47 g) and ethanol (70 ml) was heated under reflux for 15 hours. The reaction mixture was concentrated, and the residue was diluted with water and extracted with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4), and then concentrated. The residue was subjected to column chromatography on silica gel, and ethyl E-5-hydroxyimino-5-phenylpentanoate (7.55 g, yield 88%) was obtained as crystals from a fraction eluted with ethyl acetate-hexane (1:3, v/v). Recrystallization from hexane gave colorless crystals. m.p. 28-30° C. was heated under reflux for 15 hours The reaction mixture was concentrated the residue was diluted with water extracted with ethyl acetate The ethyl acetate layer was washed with water dried (MgSO4) concentrated

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

实验步骤: A mixture of ethyl 5-oxo-5-phenylpentanoate (8.00 g), hydroxylamine hydrochloride (3.03 g), sodium acetate (4.47 g) and ethanol (70 ml) was heated under reflux for 15 hours. The reaction mixture was concentrated, and the residue was diluted with water and extracted with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4), and then concentrated. The residue was subjected to column chromatography on silica gel, and ethyl E-5-hydroxyimino-5-phenylpentanoate (7.55 g, yield 88%) was obtained as crystals from a fraction eluted with ethyl acetate-hexane (1:3, v/v). Recrystallization from hexane gave colorless crystals. m.p. 28-30° C. was heated under reflux for 15 hours The reaction mixture was concentrated the residue was diluted with water extracted with ethyl acetate The ethyl acetate layer was washed with water dried (MgSO4) concentrated

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

实验步骤: The expected acid is obtained in the form of a white solid with a yield of 11% by following a procedure analogous to Example 1 and starting from 4-chlorophenylhydrazine and ethyl δ-oxobenzenepentanoate.

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

实验步骤: The expected acid is obtained in the form of a white solid with a yield of 11% by following a procedure analogous to Example 1 and starting from 4-chlorophenylhydrazine and ethyl δ-oxobenzenepentanoate.

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 mixture of ethyl 5-oxo-5-phenylpentanoate (8.00 g), hydroxylamine hydrochloride (3.03 g), sodium acetate (4.47 g) and ethanol (70 ml) was heated under reflux for 15 hours. The reaction mixture was concentrated, and the residue was diluted with water and extracted with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4), and then concentrated. The residue was subjected to column chromatography on silica gel, and ethyl E-5-hydroxyimino-5-phenylpentanoate (7.55 g, yield 88%) was obtained as crystals from a fraction eluted with ethyl acetate-hexane (1:3, v/v). Recrystallization from hexane gave colorless crystals. m.p. 28-30° C. was heated under reflux for 15 hours The reaction mixture was concentrated the residue was diluted with water extracted with ethyl acetate The ethyl acetate layer was washed with water dried (MgSO4) concentrated

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

实验步骤: A mixture of ethyl 5-oxo-5-phenylpentanoate (8.00 g), hydroxylamine hydrochloride (3.03 g), sodium acetate (4.47 g) and ethanol (70 ml) was heated under reflux for 15 hours. The reaction mixture was concentrated, and the residue was diluted with water and extracted with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4), and then concentrated. The residue was subjected to column chromatography on silica gel, and ethyl E-5-hydroxyimino-5-phenylpentanoate (7.55 g, yield 88%) was obtained as crystals from a fraction eluted with ethyl acetate-hexane (1:3, v/v). Recrystallization from hexane gave colorless crystals. m.p. 28-30° C. was heated under reflux for 15 hours The reaction mixture was concentrated the residue was diluted with water extracted with ethyl acetate The ethyl acetate layer was washed with water dried (MgSO4) concentrated

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

实验步骤: A mixture of ethyl 5-oxo-5-phenylpentanoate (8.00 g), hydroxylamine hydrochloride (3.03 g), sodium acetate (4.47 g) and ethanol (70 ml) was heated under reflux for 15 hours. The reaction mixture was concentrated, and the residue was diluted with water and extracted with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4), and then concentrated. The residue was subjected to column chromatography on silica gel, and ethyl E-5-hydroxyimino-5-phenylpentanoate (7.55 g, yield 88%) was obtained as crystals from a fraction eluted with ethyl acetate-hexane (1:3, v/v). Recrystallization from hexane gave colorless crystals. m.p. 28-30° C. was heated under reflux for 15 hours The reaction mixture was concentrated the residue was diluted with water extracted with ethyl acetate The ethyl acetate layer was washed with water dried (MgSO4) concentrated

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

实验步骤: The expected acid is obtained in the form of a white solid with a yield of 11% by following a procedure analogous to Example 1 and starting from 4-chlorophenylhydrazine and ethyl δ-oxobenzenepentanoate.