Hydrochloric Acid → HCID 18399389, compound

Participants

Reaction Steps

The compound obtained in Example 5 (10.0 g) is dissolved in chloroform (20 ml), and thereto are added a 4M solution of hydrogen chloride in ethyl acetate (60 ml). The mixture is stirred at room temperature overnight. The resulting suspension is neutralized with 2M aqueous sodium hydroxide solution (120 ml) under ice-cooling, and the mixture is extracted with ethyl acetate. The ethyl acetate layer is separated, washed, dried, and concentrated under reduced pressure. The residue is dissolved in a small amount of ethyl acetate, and crystallized from diethyl ether to give 2-(4-aminophenyl)-7-hydroxy-6-methoxy-3-methoxycarbonyl-4-(3,4,5-trimethoxyphenyl)-1(2H)-isoquinolinone (5.47 g).

Provenance & Evidence