Synthesis of difluoromethylated spiropyrazolones <i>via</i> [3 + 2] cycloaddition of difluoroacetohydrazonoyl bromides with alkylidene pyrazolones
作者:Yang Feng、Yuanyuan Ren、Duoduo Tang、Ke-Hu Wang、Junjiao Wang、Danfeng Huang、Xiaobo Lv、Yulai Hu
DOI:10.1039/d4ob00044g
日期:2024.4.3
An effective [3 + 2] cycloaddition reaction of difluoromethyl or trifluoromethyl hydrazonoyl bromides with alkylidene pyrazolones was disclosed. This method provides an efficient approach for accessing a variety of highly functionalized fluoroalkyl spiropyrazolones in good yields. This protocol also features some advantages such as easily available and stable substrates, simple operation procedures