Cross-Coupling Reactions of Monosubstituted Tetrazines
作者:Lukas V. Hoff、Simon D. Schnell、Andrea Tomio、Anthony Linden、Karl Gademann
DOI:10.1021/acs.orglett.1c01813
日期:2021.8.6
A Ag-mediated Pd-catalyzed cross-coupling method for 3-bromo-1,2,4,5-tetrazine with boronic acids is presented. Electronic modification of the 1,1′-bis(diphenylphosphine)ferrocene (dppf) ligand was found to be crucial for good turnover. Using this fast method, a variety of alkyl-, heteroatom-, and halide-substituted aryl- and heteroaryl-tetrazines were prepared (29 examples, up to 87% yield).