Herein we reported the electrochemical hydroboration of alkynes by using B2Pin2 as the boron source. This unprecedented reaction manifold was applied to a broad range of alkynes, giving the hydroboration products in good to excellent yields without the need of a metal catalyst or a hydride source. This transformation relied on the possible electrochemical oxidation of an in situ formed borate. This anodic oxidation performed in an undivided cell allowed the formation of a putative boryl radical, which reacted on the alkyne.

The electrochemical synthesis of fluorinated allyl silanes and boronates was disclosed. The addition of electrogenerated boryl or silyl radicals onto many α‐trifluoromethyl or α‐difluoromethylstyrenes in an undivided cell allowed the formation of a large panel of synthetically useful gem‐difluoro and γ‐fluoroallyl boronates and silanes (64 examples, from 31 % to 95 % yield). In addition, a scale up of the reactions under continuous flow was showcased using an electrochemical reactor with promising volumetric productivity (688 g.L−1.h−1 and 496 g.L−1.h−1). Moreover, the synthetic utility of these building blocks was highlighted through versatile transformations. Finally, plausible reaction mechanisms were suggested to explain the formation of the products.

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.