中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 3-nitro-1-propyl-1H-pyrazole | 1003011-58-2 | C6H9N3O2 | 155.156 |
An efficient protocol for the synthesis of fluorescent 4‐amino‐1,3′‐bipyrazoles, which are substituted at the positions N‐1′, C‐4′, C‐3 and C‐5, is described. By a two‐step synthetic strategy, an initial azo coupling of ethyl cyanoacetate and various 1‐alkylpyrazolyldiazonium chlorides gave substituted ethyl 2‐cyano‐2‐(2‐(pyrazol‐3‐yl)hydrazine‐ylidene)acetates, which were subsequently subjected to Thorpe‐Ziegler type cyclisation reactions to yield the title compounds.