反应详情

Diethyl azodicarboxylate (0.94 g) was added to a mixture of 3-azabicyclo[3.1.0]hexane-2,4-dione (0.5 g), 1,7-heptanediol (2.46 g), triphenylphosphine (1.42 g) and 4 angstrom sieves (1.5 g) in dry tetrahydrofuran (10 ml) under a nitrogen atmosphere. The reaction mixture was stirred at room temperature for 2 days and was then filtered. The solids were washed with ethyl acetate (2×50 ml) and the combined filtrates were evaporated in vacuo. The residue was purified by chromatography on silica using 60-70% ethyl acetate/hexane as eluant, followed by kugelrohr distillation (b.p. 200-220° C. @ 1 mmHg) to give the subtitle compound as a viscous oil.

1. filtrationwas then filtered
2. washThe solids were washed with ethyl acetate (2×50 ml)
3. customthe combined filtrates were evaporated in vacuo
4. customThe residue was purified by chromatography on silica using 60-70% ethyl acetate/hexane as eluant
5. distillationfollowed by kugelrohr distillation (b.p. 200-220° C. @ 1 mmHg)