Copper-catalyzed formal propargylic [3 + 2] cycloaddition for stereoselective construction of (E)-β-pyrazolylacrylates
作者:Jiao Han、You-Wei Xu、Xue-Ming Wang、Lei Zhang、Xiang-Ping Hu
DOI:10.1016/j.tetlet.2019.151409
日期:2020.1
A copper-catalyzed formal propargylic [3+2] cycloaddition between propargylic acetates and 3-(2-tosylhydrazono)propanoates for the synthesis of (E)- β -substituted- β -pyrazolylacrylates has been realized. The reaction showed broad substrate scope and excellent stereoselectivities, thus leading to a variety of (E)- β -substituted- β -pyrazolylacrylates in moderate to good yields. The employment of