Nucleophilic Attack on Nitrogen in Tetrazines by Silyl-Enol Ethers
作者:Simon D. Schnell、Mauro Schilling、Jan Sklyaruk、Anthony Linden、Sandra Luber、Karl Gademann
DOI:10.1021/acs.orglett.0c04113
日期:2021.4.2
The nucleophilic addition of silyl-enol ethers to nitrogen in 3-monosubstituted s-tetrazines mediated by BF3 is reported. The preference for this azaphilic addition over the usually observed inverse electron demand Diels–Alder reactions was evaluated theoretically and corroborated by experiments. The substrate dependency of this unusual reaction was rationalized by determination of the activation barriers