1: With ozone in methanol T=-78°C; 2: With dimethylsulfide; toluene-4-sulfonic acid T=-78 - 20°C; 3: With perchloric acid in tetrahydrofuran T=0 - 20°C;
参考文献
Bunce, Richard A.; Herron, Derrick M.; Lewis, Jason R.; Kotturi, Sharadsrikar V.
Journal of Heterocyclic Chemistry, 2003 , vol. 40, # 1 p. 113 - 120