1: 89 percent / imidazole / tetrahydrofuran / 4.5 h / Ambient temperature 2: 38 percent / Pseudomonas cepacia lipase / various solvent(s) / 4 h 3: 92 percent / Wofatit SBW (OH-) / methanol / 24 h / Ambient temperature 4: 70 percent / DEAD, Ph3P / tetrahydrofuran 5: 95 percent / aq. AcOH / tetrahydrofuran / Ambient temperature 6: 80 percent / CrO3, H2SO4 / acetone / 0.5 h / Ambient temperature 7: 91 percent / aq. MeNH2 / ethanol / 1.5 h / Ambient temperature View Scheme

3,3-dimethyldioxirane in acetone

1: 89 percent / imidazole / tetrahydrofuran / 4.5 h / Ambient temperature 3: 76 percent / DEAD, Ph3P / tetrahydrofuran 4: 78 percent / aq. AcOH / tetrahydrofuran / Ambient temperature 5: 80 percent / CrO3, H2SO4 / acetone / 0.5 h / Ambient temperature 6: 90 percent / aq. MeNH2 / ethanol / 1.5 h / Ambient temperature View Scheme