反应详情

A solution of 1-ethoxy-3,4-dihydroisoquinoline (4.25 g.) and 1-hydrazino-3,4-dihydroisoquinoline (3.9 g.) in methanol (40 ml.) was stirred at room temperature overnight and then at reflux for a day. More 1-ethoxy-3,4-dihydroisoquinoline (1 g.) was added during the reflux period. The solution was stripped of methanol and the solid was recrystallized from 2-propanol, affording 1,1'-azinobis(1,2,3,4-tetrahydroisoquinoline) (II: Y=Y' =Z=Z' H) (first crop, 2.6 g., m.p. 178°-179° C.). In this example 1-hydrazino-3,4-dihydroisoquinoline hydrochloride can be used instead of 1-hydrazino-3,4-dihydroisoquinoline.

1. temperatureat reflux for a day
2. customthe solid was recrystallized from 2-propanol