Synthesis of Selenadiazoles

Synthesis of Selenadiazoles.—One important selenium-transfer reagent is selenium dioxide, which reacts with hydrazones such as (140) to form 1,2,3-selenadiazoles (141) steroid-like compounds (142 = H, Me, or OMe) can be made in this 

Durgeat, M. Guyot, C. Brassy, and B. Bachet, Tetrahedron Lett., 1980, 21, 1457. 

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SCHEME 10 Synthesis of selenadiazoles and thiadiazoles from IL-supported hydrazine. 

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