disodium tetracarbonylosmate 、
cis-3,4-bis(trifluoromethylsulfonyloxymethyl)oxolane 、 trans-3,4-bis(trifluoromethylsulfonyloxymethyl)oxolane 以
甲醚 为溶剂,
生成 7,7,7,7-tetracarbonyl-3-oxa-7-osma-trans-bicyclo{3.3.0}octane 、 7,7,7,7-tetracarbonyl-3-oxa-7-osma-cis-bicyclo{3.3.0}octane