HCID 19423821, compound → HCID 70045402, compound

Participants

Reaction Steps

Into a 250 ml four-necked flask equipped with a stirrer 25 g of 1-(3',4'-diethoxy-benzyl)6,7-diethoxy-3,4-dihydro-isoquinolinium-theophylline-7-acetate-monohydrate and 250 ml of anhydrous acetone are weighed in. The reaction mixture is stirred at room temperature for 5 hours. The crystalline product is transformed into a loose yellowish-white thick substance, which is filtered, washed twice with 20 ml of acetone each and dried. Thus 23.5 g of the desired compound are obtained, yield 96.5%. mp: 152°-154° C. The product is identical with the substance prepared according to Example 4.

Provenance & Evidence