93251-37-7Relevant articles and documents
DMSO as a C1 Source for [2 + 2 + 1] Pyrazole Ring Construction via Metal-Free Annulation with Enaminones and Hydrazines
Guo, Haijin,Tian, Lihong,Liu, Yunyun,Wan, Jie-Ping
supporting information, p. 228 - 233 (2022/01/04)
A cascade reaction between enaminones, hydrazines, and dimethyl sulfoxide (DMSO) for the synthesis of 1,4-disubstituted pyrazoles catalyzed by molecular iodine in the presence of Selectfluor has been realized. DMSO plays a dual role as the C1 source and the reaction medium. In addition, the synthesis of 1,3,4-trisubstituted pyrazoles using aldehydes as alternative C1 building blocks has also been achieved.
Ring transformation of 5-acylpyrimidines into 4-acyl-pyrazoles with hydrazine and phenylhydrazine in acidic medium
Terada,Takagi,Bajinati,Hubert-Habart
, p. 1847 - 1851 (2007/10/02)
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