反应详情

A solution of N-[2-(dimethylamino)ethyl]hydrazine (8.5 mg) in pyridine (0.5 mL) is added to 9-chloro-6-fluoro-4-(p-methoxybenzyloxy) benzo[g]isoquinoline-5,10-dione of Preparative Example 29 (13 mg) over a period of 2 minutes at 0° C. under a nitrogen blanket and the mixture is stirred for 2 h. The excess pyridine and some excess hydrazine are removed under a nitrogen stream. The residue is placed under vacuum overnight. The product is purified by thick layer chromathography (silica gel, 10 cm by 20 cm) using 4% methanol/96% dicloromethane. The major yellow band is scraped from the plate and the yellow compound extracted into 25% methanol/75% dicloromethane. Removal of the solvent gives 5-chloro-2-[2-(dimethylamino)ethyl]-10-(p-methoxybenzyloxy) isoquino[5,6,7-cd]indazole-6(2H)-one (3 mg) as an amorphous solid.

1. customThe excess pyridine and some excess hydrazine are removed under a nitrogen stream
2. customis placed under vacuum overnight
3. customThe product is purified by thick layer chromathography (silica gel, 10 cm by 20 cm)
4. extractionthe yellow compound extracted into 25% methanol/75% dicloromethane
5. customRemoval of the solvent