An Efficient Synthesis of Pyrazolyl‐1,2,3‐thiadiazoles
<i>via</i>
Hurd–Mori Reaction
作者:Satish Gudala、Srinivasa Rao Ambati、Jeevan Lal Patel、Rajeswar Rao Vedula、Santhosh Penta
DOI:10.1002/jhet.3609
日期:2019.8
An efficient synthetic strategy has been developed for the synthesis of pyrazolyl‐1,2,3‐thiadiazoles via Hurd–Mori cyclization reaction. The reaction of various pyrazolyl‐phenylethanones with semicarbazide hydrochloride in the presence of sodium acetate/methanol gave the corresponding semicarbazones (3a–i). These semicarbazones were further reacted with thionyl chloride via the Hurd–Mori cyclization
已经开发了一种有效的合成策略,用于通过Hurd-Mori环化反应合成吡唑基1,2,3-噻二唑。在乙酸钠/甲醇存在下,各种吡唑基-苯乙酮与氨基脲盐酸盐的反应得到相应的氨基脲(3a – i)。通过Hurd-Mori环化条件,将这些半咔唑酮与亚硫酰氯进一步反应,以完成标题产物(4a – i)。本方案有利于通过以各种底物以优异的产率形成C-S,NS和C═N键来形成吡唑基半脲酮衍生物和吡唑基1,2,3-噻二唑衍生物。通过分析和光谱研究对最终化合物进行表征。