反应详情

To a warm (50° C.) solution of 8-t-butyl-2-(phthalimidomethyl)-1,4-dioxaspiro(4,5)decane (12.5 g, 35 mmol) in ethanol (100 ml) was added hydrazine hydrate (3.6 g, 72 mmol). The reaction mixture was kept at 50° C. for 1 hour. Light petroleum 200 ml was added and insoluble material was filtered off. The solvent was evaporated in vacuo. The residue was dissolved in toluene (100 ml) washed with brine (100 ml) and dried (MgSO4). Evaporation of the solvent yielded the title compound as a yellow oil (7.2 g). GC analysis indicated the compound as existing as a mixture of two diastereoisomers (cis, cis and cis, trans) in a ratio of 48:52. The NMR spectra are in agreement with the assigned structure.

1. filtrationinsoluble material was filtered off
2. customThe solvent was evaporated in vacuo
3. dissolutionThe residue was dissolved in toluene (100 ml)
4. washwashed with brine (100 ml)
5. dry with materialdried (MgSO4)
6. customEvaporation of the solvent