反应详情

To a solution of 5.0 g. of 2-amino-6-benzyloxy-1-hydroxy-5-nitro-1,2,3,4-tetrahydronaphthalene hydrochloride in 50 ml. of methanol are added 5.0 g. of lithium cyanoborohydride and 150 ml. of acetone, and the mixture is stirred at room temperature for 3 hours. The reaction mixture is added in water and the resulting crystals are recovered by filtration, rinsed with water, dried and dissolved in alcoholic hydrochloric acid. After treatment with activated carbon, ethyl ether is added, whereupon 4.7 g. of 6-benzyloxy-2-isopropylamino-5-nitro-1-hydroxy-1,2,3,4-tetrahydronaphthalene hydrochloride is obtained as colorless needles melting at 268°-270° C.

1. filtrationthe resulting crystals are recovered by filtration
2. washrinsed with water
3. customdried
4. dissolutiondissolved in alcoholic hydrochloric acid
5. additionAfter treatment with activated carbon, ethyl ether is added, whereupon 4.7 g