- An Unambiguous Synthesis of Pyrazoles by Sulphur Extrusion from 1,2,6-Thiadiazines
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Di-imines (1) react with thionyl chloride and sulphur monochloride and dichloride giving different 1,2,6-thiadiazine S-oxides (3) and 1,2,6-thiadiazines (4), respectively.These last two compounds lead, by heating, to pyrazoles (6) via thermal extrusion of
- Barluenga, Jose,Lopez-Ortiz, J. Francisco,Tomas, Miguel,Gotor, Vicente
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p. 1891 - 1895
(2007/10/02)
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