“…Found: C,42.22;H,2.95;N,4.01. (1aRS,9aSR,2,8,9,9a,oxireno[a]indolizine ( 6) and (1aRS,9aRS,9bSR)-1a,2,8,9,9a,9b-Hexahydrobenzo[e]oxireno[a]indolizine (7). Compound 2 (0.345 g, 1.0 mmol) was added to a suspension of PtO 2 •H 2 O (0.023 g, 0.1 mmol) in MeOH (16 mL), and the mixture was stirred at room temperature under an atmospheric pressure of hydrogen for 12 h. The solution was filtered through a celite pad, washed with MeOH and CH 2 Cl 2 , and evaporated to dryness affording a mixture of 4 and 5 as the major compounds, which was dissolved in THF (12 mL) and water (4 mL), added with solid KOH (0.168 g, 3.0 mmol), and heated at 40 °C for 24 h. The reaction crude was extracted with ethyl acetate (4 × 10 mL), and the resulting organic phase was dried over anhydrous Na 2 SO 4 and evaporated under reduced pressure.…”