Electrochemical Borylation of Electron-Deficient Alkenes and Allenoates

The electrochemical borylation of electro-deficient alkenes and allenoates is disclosed. In an undivided cell and under galvanostatic conditions a panel of Michael acceptor and allenoates was readily reacted. The reaction offered an access to versatile borylated building blocks in good to excellent yields (20 examples, 47 % to 91 % yields). A plausible reaction mechanism, based on the literature precedent was suggested.