(3,5-二氯苄基)-肼

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

实验步骤: After adding 1 g of p-toluenesulphonic acid to a solution of 49.6 g of β-amino-β-ethoxyacrylic acid ethyl ester in 220 ml of ethanol, 59 g of 3,5-dichlorobenzylhydrazine were added dropwise under nitrogen. The solution was left to stand overnight and the solids which precipitated melted at 175°-176° after recrystallisation from ethanol. Yield: 40 g (48%) of the compound identified above. were added dropwise under nitrogen The solution was left the solids which precipitated melted at 175°-176° after recrystallisation from ethanol

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

实验步骤: After adding 1 g of p-toluenesulphonic acid to a solution of 49.6 g of β-amino-β-ethoxyacrylic acid ethyl ester in 220 ml of ethanol, 59 g of 3,5-dichlorobenzylhydrazine were added dropwise under nitrogen. The solution was left to stand overnight and the solids which precipitated melted at 175°-176° after recrystallisation from ethanol. Yield: 40 g (48%) of the compound identified above. were added dropwise under nitrogen The solution was left the solids which precipitated melted at 175°-176° after recrystallisation from ethanol

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

实验步骤: After adding 1 g of p-toluenesulphonic acid to a solution of 49.6 g of β-amino-β-ethoxyacrylic acid ethyl ester in 220 ml of ethanol, 59 g of 3,5-dichlorobenzylhydrazine were added dropwise under nitrogen. The solution was left to stand overnight and the solids which precipitated melted at 175°-176° after recrystallisation from ethanol. Yield: 40 g (48%) of the compound identified above. were added dropwise under nitrogen The solution was left the solids which precipitated melted at 175°-176° after recrystallisation from ethanol

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

实验步骤: After adding 1 g of p-toluenesulphonic acid to a solution of 49.6 g of β-amino-β-ethoxyacrylic acid ethyl ester in "ml of ethanol, 59 g of 3,5-dichlorobenzylhydrazine were added dropwise under nitrogen. The solution was left to stand overnight and the solids which precipitated melted at 175°-176° after recrystallisation from ethanol. Yield: 40 g (48%) of the compound identified above. were added dropwise under nitrogen The solution was left the solids which precipitated melted at 175°-176° after recrystallisation from ethanol

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

实验步骤: After adding 1 g of p-toluenesulphonic acid to a solution of 49.6 g of β-amino-β-ethoxyacrylic acid ethyl ester in 220 ml of ethanol, 59 g of 3,5-dichlorobenzylhydrazine were added dropwise under nitrogen. The solution was left to stand overnight and the solids which precipitated melted at 175°-176° after recrystallisation from ethanol. Yield: 40 g (48%) of the compound identified above. were added dropwise under nitrogen The solution was left the solids which precipitated melted at 175°-176° after recrystallisation from ethanol

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

实验步骤: After adding 1 g of p-toluenesulphonic acid to a solution of 49.6 g of β-amino-β-ethoxyacrylic acid ethyl ester in 220 ml of ethanol, 59 g of 3,5-dichlorobenzylhydrazine were added dropwise under nitrogen. The solution was left to stand overnight and the solids which precipitated melted at 175°-176° after recrystallisation from ethanol. Yield: 40 g (48%) of the compound identified above. were added dropwise under nitrogen The solution was left the solids which precipitated melted at 175°-176° after recrystallisation from ethanol