Tetrahedron Letters

A new efficient synthesis of pyrazoles from hydrazonoyl halides and β-oxophosphonates

A Sun, JH Ye, H Yu, W Zhang, X Wang

文献索引：Sun, Aixue; Ye, Jia-Hai; Yu, Haitao; Zhang, Wenchao; Wang, Xiaolong Tetrahedron Letters, 2014 , vol. 55, # 4 p. 889 - 892

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被引用次数: 9

摘要

Abstract A new practical and efficient synthesis of 1, 3, 5-trisubstituted pyrazoles has been developed by reacting of hydrazonoyl halides with β-oxophosphonates under mild conditions in good yields with excellent regioselectivity. This process employs an addition– elimination sequence. Wide scope, functional group compatibility has been established.