4-Methylphenylhydrazine monohydrochloride → 1-(4-Methylphenyl)pyrazolidin-3-one

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

10 g of p-tolylhydrazine hydrochloride are dissolved in 100 ml of anhydrous CH2Cl2. The solution is cooled to 0° C. and 19 ml of DBU and then 6.5 mg of 3-bromopropionyl chloride are added. The mixture is stirred at ambient temperature for one hour. The reaction medium is poured onto water, extraction is carried out with CH2Cl2 and then purification is carried out by chromatography on a silica column eluted with an AcOEt/petroleum ether (v/v; 50/50) mixture. 1.3 g of crystals are obtained.

Herkunft & Nachweise