反应详情

Trans-1,2-diamino-1,2,3,4-tetrahydronaphthalene (461 mg, 2.84 m mol) was dissolved in ethanol (8 ml), water (4 ml) was added to the solution, then carbon disulfide (190 μl, 3.17 m mol) was added thereto under stirring at room temperature. The mixture was heated under reflux for 4 hours and cooled in an ice-water bath. The crystals precipitating out were separated by filtration, washed with ether and dried in vacuum to give trans-3a,4,5,9b-tetrahydronaphth[1,2-d]imidazoline-2-thione (350 mg, 1.71 m mol) in 60% yield. The data spectroscopy and elemental analysis were as follows:

1. temperatureThe mixture was heated
2. temperatureunder reflux for 4 hours
3. temperaturecooled in an ice-water bath
4. customThe crystals precipitating out
5. customwere separated by filtration
6. washwashed with ether
7. customdried in vacuum