(2,5-Dichlorophenyl)hydrazine → 1-Allyl-2-[(2,5-dichloro-phenyl)-hydrazono]-cyclopentanecarboxylic acid ethyl ester

Participants

Reaction Steps

To a solution of 2-carbethoxy-2-allylcyclopentanone (110 mg, 0.55 mmol) in 1 mL of methanol was added (2,5-dichloro-phenyl)-hydrazine (89 mg, 0.50 mmol) and sodium acetate (62 mg, 0.75 mmol). The reaction mixture was stirred at room temperature over night. The reaction mixture was concentrated and adding 10 mL of ethyl acetate diluted the residue. The organic solution was washed with 5 mL of water and 5 mL of brine. The organic layer was dried over sodium sulfate and concentrated to give the crude product, which was directly used in next step without purification.

Provenance & Evidence