HCID 10202989, compound → HCID 68420335, compound

Participants

Reaction Steps

1.40 g (3.25 mmol) of t-butyl 2-[4-(5H-dibenzo[a,d][7]annulen-5-ylidene)-1-piperidinyl]-2-oxoethylcarbamate was dissolved in 20 ml of 1,4-dioxane. 12 ml of 4 N hydrochloric acid/1,4-dioxane solution was added to the obtained solution, and they were stirred overnight. After the neutralization with 4 N aqueous sodium hydroxide solution, the solvent was evaporated under reduced pressure. Saturated aqueous sodium chloride solution was added to the reaction mixture. After the extraction with ethyl acetate 3 times, the extract was dried over anhydrous sodium sulfate and then the solvent was evaporated under reduced pressure. 10 ml of a solution of ethyl acetate:hexane (1:2) and then 2 ml of 4 N hydrochloric acid/1,4-dioxane solution were added to the residue. The resultant precipitates were taken by the filtration, washed with a solution of ethyl acetate:hexane (1:2) and air-dried. After further drying under reduced pressure, the title compound was obtained.

Provenance & Evidence