Isobutyryl chloride → Methyl 2-[5-isobutyryl-1-naphthyl]propionate

Beteiligte Stoffe

Reaktionsschritte

Under vigorous magnetic stirring, CH2Cl2 (125 cc) followed by AlCl3 (60 g) are added to a 500 cc three-necked flask provided with a cooling device with CaCl2 trap, a dropping funnel and a thermometer (said three-necked flask being immersed in a water-bath maintained at room temperature). Methyl 2-(1-naphthyl)-propionate (32.1 g) and isobutyryl chloride (18 cc) dissolved in CH2Cl2 (100 cc) are added thereto dropwise. The addition takes 2.5 hours. On completion of the addition, the ingredients are maintained in contact, with continued stirring. Hydrolysis is effected by pouring the reaction mixture over ice-water. The material is extracted with ether. The organic phase is washed over Na2SO4 ; the ether and CH2Cl2 are distilled off and the residual oil is distilled, to give the product named in the title.

Herkunft & Nachweise