Copper-Promoted Aerobic Oxidative [3+2] Cycloaddition Reactions of N,N-Disubstituted Hydrazines with Alkynoates: Access to Substituted Pyrazoles
作者:Xiaoying Zou、Lvyin Zheng、Xiaoya Zhuo、Yumei Zhong、Yingying Wu、Beining Yang、Qifang He、Wei Guo
DOI:10.1021/acs.joc.2c02610
日期:2023.2.17
A copper-promoted aerobic oxidative [3+2] cycloaddition reaction for the synthesis of various substituted pyrazoles from N,N-disubstituted hydrazines with alkynoates in the presence of bases is developed. This work involves a direct C(sp3)–H functionalization and the formation of new C–C/C–N bonds. In this strategy, inexpensive and easily available Cu2O serves as the promoter and air acts as the green
开发了铜促进的有氧氧化 [3+2] 环加成反应,用于在碱存在下从 N,N-二取代肼与炔酸酯合成各种取代吡唑。这项工作涉及直接 C(sp 3 )–H 功能化和新 C–C/C–N 键的形成。在该策略中,廉价易得的Cu 2 O作为促进剂,空气作为绿色氧化剂。该反应具有原子和步骤经济性高、区域选择性高、操作简单等优点。